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Bourgou, Larbouga, Windpouiré Vianney Tarpaga, Sidiki K. Diane i Denys Sanfo. "Evaluation et sélection d’une variété de cotonnier (FK64, Gossypium hirsutum L.) au Burkina Faso". International Journal of Biological and Chemical Sciences 14, nr 3 (18.06.2020): 869–82. http://dx.doi.org/10.4314/ijbcs.v14i3.18.
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Le coton du Burkina Faso est presqu’entièrement exporté ; les variétés cultivées doivent régulièrement répondre aux exigences du marché. Une fratrie de lignées de cotonnier a été comparée à deux variétés, FK37 et Stam 59A, respectivement dans les zones cotonnières humides et sèches de 2006 à 2009, pour mettre en exergue celle qui améliore les performances agronomiques et technologiques de fibre de ces témoins. A l’issue d’évaluations multilocales, FK64 et FK69 ont été identifiées comme de potentielles nouvelles variétés et testées en milieu paysan. Dans les zones humides, FK64 et FK69 n’ont pas apporté d’amélioration significative ; il est inopportun de les y vulgariser. Dans les zones sèches, FK64 a le mieux performé et a été retenue pour y être vulgarisée. Elle apporte un surplus en pourcentage fibre (+ 0,41%) et en seed index (+ 0,35 g). Aussi, elle apparait meilleure que Stam 59A pour la longueur (+ 1,44 mm) et la ténacité (+ 1,90 g/tex), deux caractéristiques déterminantes du marketing de la fibre. Avec la suspension du coton Bt et le retour à la culture conventionnelle, FK64 lancée en culture commerciale a convaincu. Elle pourrait être candidate à la transformation en cas de retour dans la technologie Bt.Mots clés: Evaluations multilocales, tests variétaux, caractéristiques agronomiques, caractéristiques technologiques, Burkina Faso.
English Title: Assessment and selection of a cultivar of cotton (FK64, Gossypium hirsutum L.) in Burkina Faso
Cotton produced in Burkina Faso is almost entirely exported; so cultivars must be developed following the market demand. A sibling of cotton lines was compared to two varieties, FK37 and Stam 59A, respectively in humid and dry cotton production areas between 2006 and 2009 to highlight which one enhances agronomic and fiber quality performances compared to the local control. After multilocation trials, FK64 and FK69 were highlighted as promising news varieties then evaluated under farmer’s conditions of production. In the humid areas, FK64 as well as FK69 did not bring any significant improvement; it was not recommended to release any of them there. In the dry production areas, FK64 performed better, then it was retained to be possibly popularized. It brings a surplus in terms of ginning out turn (+ 0,41%) and seed index (+ 0,35 g). Moreover, it outperformed Stam 59A in fiber length (+ 1,44 mm) and strength (+ 1,90 g/tex), two major cotton fiber marketing properties. At the morrow of the suspension of the Bt cotton and back to conventional production, FK64 was launched in commercial production and it convinced. It could be aspirant to Bt introgression in case country resumes back to the technology.Keywords: multilocation trials, varietal trials, agronomical characteristics, fiber properties, Burkina Faso.
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Alexis, Hougni, Imorou Lucien, Dagoudo Augustin i Zoumarou-Wallis Nouhoun. "Caractérisation Agro-Morphologique De Variétés De Cotonnier (Gossypium Hirsutum) Pour Une Régionalisation Economique Pour La Production Du Coton Au Bénin". European Scientific Journal, ESJ 12, nr 36 (31.12.2016): 210. http://dx.doi.org/10.19044/esj.2016.v12n36p210.
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To take more account of the terroir effect in varietal choice and address the concerns of cotton farmers who disapprove the agricultural policy of single variety, research on varietal regionalization was initiated during four campaigns, by the Agricultural Research Center for Cotton Fibers. This idea is reinforced by the diversity of agro-ecological zones of the country. The nonrenewal of the variety in extension since the 2002-2003 campaign is also an element of justification concerns of industry players. This study aims to exploit the terroir effect to identify the most suitable varieties for each agroecological zone and meet the needs of industry players including producers and ginners. The experiment was conducted in 2011-2012 on Angaradébou sites, Okpara, Savalou and Ketou respectively representing the zones 1 (Alibori / Atakora); 2 (Borgou / Donga); 3 (Hills) and 4 (Zou / Ouemé Plateau / Mono-Couffo). The adopted experimental device is a Fisher block with four replicate and eight treatments or varieties H 279-1 in extension witness. Other varieties include E 944-2; E 956-2; H 769-5; H 782-3; I 875-3; K 768-3 and K 787-2.The measured parameters are the earliness of production, seed cotton yield in the field, the weight of 100 seeds and the fiber ginning outturn. Data analysis revealed significant differences between and inside sites for most measured parameters. The results showed that varieties E 956-2 (1983.85 kg / ha), H 769-5 (1820.49 kg / ha), K 768-3 (1735.42 kg / ha) and H 782-3 (1533.59 kg / ha) in terms of seed cotton yield in the field and compared their performance to shattering were the best respectively in zones 1, 2, 3 and 4.
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Long, Robert L., Christopher D. Delhom i Michael P. Bange. "Effects of cotton genotype, defoliation timing and season on fiber cross-sectional properties and yarn performance". Textile Research Journal 91, nr 17-18 (10.02.2021): 1943–56. http://dx.doi.org/10.1177/0040517521992769.
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Cotton fiber cross-sectional properties influence the performance of ring spun yarns. The spinning performance of two Gossypium hirsutum L. Upland cotton genotypes known to have inherently different fiber fineness properties were compared. Genotypes were grown together in field experiments conducted over two growing seasons, and crops were subjected to early and late defoliation treatments. The aim was to quantify the differences in yarn properties following changes targeting fiber fineness properties in isolation from other fiber properties. For the first time, the percentage difference in yarn properties was captured along with the associated changes made to alternative fiber fineness properties within the base micronaire 3.50 to 4.90 G5 range. As expected the genotype with lower fiber micronaire, linear density, and perimeter, spun yarns that were stronger and more even. Late defoliated cotton plants produced fibers that were higher in micronaire and maturity ratio, and were bigger in perimeter, which demonstrated that the fibers had expanded during the secondary wall thickening phase of development. However, the defoliation treatment effect on fiber fineness properties was smaller compared with the effect of genotype, and no change to any yarn property was detected. In terms of environmental effects, the first season cotton had smaller perimeter finer fibers that spun stronger and more even yarns. In contrast, the second season cotton had bigger perimeter fibers that spun weaker and less even yarns.
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Yu, Chongwen, Weiying Tao i Timothy A. Calamari. "Treatment and Characterization of Kenaf for Nonwoven and Woven Applications". International Nonwovens Journal os-9, nr 4 (grudzień 2000): 1558925000OS—90. http://dx.doi.org/10.1177/1558925000os-900409.
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A kenaf bast fiber is comprised of a bundle of single fibers bound by lignin and pectins. It offers the advantages of being renewable, biodegradable and environmentally safe. However, it is difficult to process kenaf fibers because of the coarseness, stiffness and low cohesion of the fiber bundles. In this research, kenaf fiber bundles have been treated by both alkaline sulfide and a modified chemical degumming methods to improve fiber properties. Tensile properties, fineness, length and softness of the kenaf fiber bundles after the treatments were determined. It was found that both treatments improved the fiber fineness, softness and elongation; however, fiber bundle strength was decreased. The modified chemical degumming method was more effective. Under the optimum modified chemical degumming condition, the fineness of the kenaf fiber bundle was improved more than 50% and the fiber bundle was more than twice as soft as the raw material. These kenaf fiber bundles were much finer and softer and found to be easier to process than those obtained in earlier studies. The treated kenaf fiber bundles can be blended with cotton fibers and easily carded on a cotton card with minimum losses. The carded batts can be further processed for either nonwoven or woven applications.
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Zhang, Wei Hao, Guo Zhong Li i Min Rong Liu. "Properties Research of Cotton Fiber Reinforced Gypsum Based Composites". Advanced Materials Research 194-196 (luty 2011): 1759–62. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.1759.
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Cotton fibers and gypsum were taken as the raw materials to manufacture cotton fiber reinforced gypsum based composites. Optimum length and dosage of cotton fiber and mixing method were confirmed in the experiments. The effect of cotton fiber on mechanical properties and waterproof properties of composites were studied. The reinforcement mechanism of cotton fibers on composites was discussed.
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Balakrishnan, Subashini, GL Dharmasri Wickramasinghe i UG Samudrika Wijayapala. "Study on dyeing behavior of banana fiber with reactive dyes". Journal of Engineered Fibers and Fabrics 14 (styczeń 2019): 155892501988447. http://dx.doi.org/10.1177/1558925019884478.
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The objective of this research paper is to establish a suitable reactive dyeing process for banana fiber and comparison between dyeing behaviors of banana fibers with cotton fibers. Ambon (Cavendish type) banana variety was selected for this research study. Data accumulation is done by quantitative research methodology and experimental research strategies for this investigation; 5% enzyme and 6% H2O2-, 2% Na2SiO3-, and 3% NaOH-treated banana fibers were dyed with reactive dye. Banana fibers were dyed with three standard colors (red, blue, and yellow) each with four different concentrations (0.25, 1%, 4%, and 6%) of reactive dye. Testing was conducted to assess the color properties between pretreated banana fiber, dyed banana fiber, and cotton fiber. Color measurement was performed by using a Datacolour 600 spectrophotometers. The ΔE* values were used to determine the degree of color deterioration. Results showed that pretreated fibers become brighter (whiteness) than the raw banana fibers. Reflectance curves of dyed banana fibers were found similar to cotton in all the experiments and confirming the dye absorption tendency is more similar to cotton. Further results indicate that the dyeing behavior of banana is similar to cotton. Therefore, cotton dyeing process can be applied for the banana fibers. Dyeing of banana fiber was carried out with a reactive type of dye, which provided better washing fastness properties than cotton fibers.
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Saputra, Ardian Dwi, M. Fahrur Rozy H, Agus Triono i Imam Sholahuddin. "ORIENTASI SUDUT LILITAN BENANG KATUN TERHADAP KEKUATAN TARIK PADA PIPA KOMPOSIT FILAMENT WINDING". ROTOR 10, nr 1 (1.04.2017): 1. http://dx.doi.org/10.19184/rotor.v10i1.5138.
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Cotton fibers currently use in many industries textiles, easy gotten in the market, and a cheap price. Using of fiber would be able to solve the environtment problems, reduce the metal using, particularly in the oil and gas industries. In this study, composite pipes are made by cotton fibers as reinforcement, particles of montmorillonite as filler, and unsaturated polyester as matrix. From that consideration this study was conducted to obtain that analysis of tensile strength composite cotton fibers. With the pattern of variation woven fiber direction angle towards the corner fibers 450, 550, 650, 750, and 850. From the test results the highest tensile strength values is obtained by a composite pipe with fiber direction angle of 850. The test results showed that the tensile strength of the cotton fiber reinforced composite pipe with direction of 450 angle fiber is 3.76 MPa, for direction of 550 angle fiber tensile strength is 1.28 MPa, for direction of 650 angle fiber tensile strength is 10.691 Mpa, for direction of 750 angle fiber tensile strength is 14.465 Mpa, and for direction of 850 angle fiber tensile strength 28.617 MPa.
Keywords: Cotton fiber, unsaturated polyester, filament winding method, montmorillonite, Tensile Strength
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Moghassem, A. R. "Study on the Dyed Cotton Fibers Damage in Spinning Processes and its Effect on the Cotton Mélange Yarn Properties". Research Journal of Textile and Apparel 12, nr 1 (1.02.2008): 71–78. http://dx.doi.org/10.1108/rjta-12-01-2008-b009.
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Grey cotton fibers with a mean fiber length and fineness of 29 mm and 4.2 micronair was pretreated, scoured and dyed. Three ring yarns were spun separately from 100% grey cotton (R.R.Y.), 50% dyed and 50% grey cotton blend (M.R.Y.) and 100% dyed cotton (D.R.Y.). The extent of fiber damage was assessed by measuring the length and the mechanical characteristics of cotton fibers after passing the fibers through the lap machine and the draw frame II. Properties of R.R.Y., M.R.Y. and D.R.Y. samples were examined. In terms of tenacity and elongation at break, grey and dyed cotton fibers, which were selected after being processed by the lap machine and the draw frame II, were very similar. The fiber length by number and weight of grey cotton was longer than that of dyed cotton, while the amount of fiber nep and short fiber content of dyed cotton were more than those of grey cotton. The three yarn samples were the same in terms of elongation at break. The tenacity of R.R.Y. was the highest but the yarn sample was the lowest in terms of coefficients of mass variation (Cv%), imperfection and hairiness in comparison with the M.R.Y. and D.R.Y. samples.
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Liyanage, Sumedha, i Noureddine Abidi. "Molecular weight and organization of cellulose at different stages of cotton fiber development". Textile Research Journal 89, nr 5 (23.01.2018): 726–38. http://dx.doi.org/10.1177/0040517517753642.
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There is a continuous change in cell wall composition and organization during cotton fiber development. Cotton fiber strength correlates to the molecular weight (MW) and molecular weight distribution (MWD), and organization of cellulose chains in the secondary cell wall. These parameters change drastically during fiber development. This study reports on the MW, MWD, and organization of cellulose in cotton fibers harvested from two cotton cultivars of Gossypium hirsutum L., (Texas Marker-1 and TX55) at different levels of maturity. Fiber dissolution is necessary to estimate the molecular properties of cellulose. Cellulose in mature cotton fibers is larger in MW and highly crystalline and, therefore, poorly dissolves in common solvent systems. To facilitate the dissolution, fibers were first pretreated with 23% sodium hydroxide and then dissolved in a dimethylacetamide/lithium chloride solvent system. Gel permeation chromatography of dissolved fibers indicated that cellulose in both cultivars reaches its maximum MW around 30 days post anthesis. Fourier transform infrared microspectroscopy imaging in the transmission mode indicates changes in cellulose distribution in cotton fibers with fiber development. The distributions of infrared vibrations of cellulose at 897 (β-linkage of cellulose), 1161 (anti-symmetrical C-O-C stretching of cellulose), and 1429 cm−1 (CH2 scissoring of cellulose) provided information on cellulose deposition in intact cotton fibers.
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Zhogashtiev, N., Y. Tashpolotov i N. Kalmurzaev. "Study of Cotton Fiber Surface After Thermal Processing in the Vacuum Chamber by the Method of Scanning Electron Microscopy". Bulletin of Science and Practice 6, nr 8 (15.08.2020): 34–38. http://dx.doi.org/10.33619/2414-2948/57/03.
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The article presents the results of a study of the surface of cotton fibers before and after thermal processing in a vacuum chamber by scanning electron microscopy. It has been established that various factors affect the structural and physicochemical properties of an ultrathin composite material based on ultra-dispersed carbon fiber. In this work, the microstructures of an ultrathin composite material obtained based on ultrafine cotton fibers were investigated and a chemical analysis of these fibers was carried out. Based on chemical analysis, it was found that the content of heat-treated cotton fiber is 98.62% during heat treatment (from 1000 to 1200 °C). Along with this, the resulting powder had carbon fibers with sizes from 2.42 to 9.18 μm, and thus ultra-thin fibers have high chemical activity. It is shown that heat treatment of the fiber leads to molecular bonding of the outer layer of the cotton fiber.
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Erdumlu, N., W. Oxenham i B. Ozipek. "The impact of combing and processing parameters on the structure and properties of fine count vortex yarns". Textile Research Journal 83, nr 4 (26.10.2012): 396–405. http://dx.doi.org/10.1177/0040517512464296.
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In this paper, the impact of short fiber content, yarn count and yarn delivery speed on the structure and properties of fine count cotton vortex yarns were investigated. The factors affecting the fine count yarn spinning on a vortex spinning system were determined on the basis of yarn structure and properties by using the linear regression technique. Moreover, the spinning limits of combed cotton vortex spun yarns were investigated. The results of the experiments revealed that the short fiber content in the cotton sliver is an important parameter in spinning fine count vortex spun yarns. The lower short fiber content in the sliver allows finer counts to be spun in the vortex spinning system. It was also observed that yarn delivery speed influences the yarn structure, and hence the yarn properties significantly, since it determines the residence time of the fibers in the yarn formation zone, and also affects the fiber control due to the air flow caused by the surface speed of the delivery rollers. In addition, the structure and properties of vortex spun yarns change significantly with regard to yarn count.
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Liu, Xinjin, Xuzhong Su, Juan Song i Yafang Zhang. "Research on properties of modified nylon blend yarn and fabric". International Journal of Clothing Science and Technology 32, nr 3 (14.11.2019): 322–37. http://dx.doi.org/10.1108/ijcst-06-2019-0076.
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Purpose Due to the excellent functionality of graphene, the research on fiber modification by graphene has been receiving more and more attentions recently, and many research findings have been conducted. However, the purpose of this paper is to focus on the fiber modification method and corresponding modified fiber properties, but the research on processing of the modified fiber, especially the textile process, is little. Therefore, in the paper, the properties of one kind of textile GN fiber and the spinning method of the GN fiber blend yarn and the functionalities of corresponding fabric are studied. Design/methodology/approach In the paper, the properties of nylon fiber modified by graphene (GN) were studied first. Then, according to the tested results, one new blending process of the GN fiber and cotton fiber was given, and corresponding properties of the blend yarns were tested and analyzed. Finally, the knitted fabrics were produced using the spun blend yarns, and the antibacterial property, electromagnetic shielding property, anti-ultraviolet performance, anti-static performance and conventional mechanical, and appearance thermal-wet comfort properties were tested and comparatively analyzed. Findings The tested results showed that the functionality of all fabrics was effective due to the addition of the graphene in the fiber, especially the antibacterial property. With the increasing of the GN fiber in the blend yarns, the functionality of all fabrics was also increased first and then achieved stability. Originality/value One new blending process of the GN fiber and cotton fiber was given. In the spinning, the combed cotton sliver was produced first, and then was torn into small parts of combed cotton sliver fiber by hand. Then, the treated GN fibers and cotton fibers were mixed for the first time, and corresponding GN/C carding sliver was produced. In this blend processing, the mixed cotton fiber was used to improve the sliver processing of the GN fiber. Then, in the drawing process, the required number of GN/C carding sliver and combed cotton sliver were fed simultaneously, and GN fibers and cotton fibers were mixed for the second time, and corresponding four kinds of GN/JC blend yarns were produced. In this blend processing, the mixed cotton fiber was used to regulate the blending ratio.
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HASNAM, EMY SULISTYOWATI, SIWI SUMARTINI, FITRINTNGDYAH TRI KADARWATI i PRIMA D. RIAJAYA. "KEMAJUAN GENETDX PADA DUA VARIETAS BARU KAPAS, KANESIA 8 DAN KANESIA". Jurnal Penelitian Tanaman Industri 10, nr 2 (15.07.2020): 66. http://dx.doi.org/10.21082/jlittri.v10n2.2004.66-73.
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<p>Tujuan utama pemuliaan kapas di Indonesia adalah meningkatkan produktivitas dan kualitas serat dalam upaya meningkatkan pendapatan petani dan memperbaiki mutu benang tcnun seta kualitas tekstil yang harus bersaing di pasar internasional. Scjumlah enam persilangan telah dilakukan antara dua varietas dai India. I.RA 5166 dan SRT-1 dengan dua varietas dai Amerika Serikat, Dcltapine 55 dan Deltapinc Acala 90 dan satu vaietas dai Australia, Siokra. Seleksi individu, seleksi galur dan seleksi individu dalam galur dilaksanakan pada generasi F2 sampai F5 berdasarkan jumlah buah, tingkat kerusakan daun terhadap Sundapteryx biguttula. dan mutu serat; semua proses di atas dilakukan pada kondisi lahan tadah hujan, dan tanpa penggunaan insektisida terhadap tanaman; dari proses di atas diperoleh 12 galur harapan. Sejumlah 13 percobaan dilakukan antara tahun 1993 sampai dengan 2001 untuk mengamati kcragaan galur-galur baru tersebut; pengujian dilakukan di Jawa Timur dan Sulawesi Selatan, menggunakan teknik-teknik penelitian standar. Dengan proscdur ini dapat diidcntifikasi beberapa galur yang menunjuk¬ kan perbaikan serenlak hasil dan kualitas serat kapas. Beberapa penelitian juga dilakukan untuk mcngcvaluasi tanggap galur-galur tersebut pada tumpangsari dengan kedelai dan kacang hijau di Jawa Timur. Dua galur, 88003/16/2 dan 92016/6 (sudah dilepas dengan nama vaietas Kanesia 8 dan Kanesia 9 pada bulan Juni 2003), menunjukkan produktivitas dan kualitas serai yang lebih linggi. Rata-rata, kedua vaietas menghasilkan 1.85 ton dan 191 ton kapas berbiji per hektar atau 8-12% lebih tinggi dai hasil vaietas Kanesia 7 yang sudah dilepas sebelumnya. Persentase serat 35.2%, kekuatan serat berkisar antara 22.6-24.7 gram tex'1, serat lebih panjang dan berkisar 29.2-30.3 mm sedangkan angka mikroncr lebih rendah yang menyatakan bahwa serat lebih halus. Semua perbaikan di atas menunjukkan perbaikan mutu serat. Kanesia 8 dan Kanesia 9 juga menunjukkan peningkatan ketahanan terhadap Sundapteryx biguttula dan komplcks hama kapas. Kanesia 8 dan Kanesia 9 kurang kompctitif dalam tumpang sari dengan kedelai jika dibandingkan dengan Kanesia 7. Pada tumpang sari dengan kacang hijau Kanesia 8 juga mengalami kehilangan hasil yang tinggi, sedangkan Kanesia 9 menunjukkan toleransi yang tinggi dalam kompctisi dengan kacang hijau. Pelepasan Kanesia 8 dan Kanesia 9 akan memberikan pilihan varietas yang lebih banyak bagi petani dan perusahaan pemintalan untuk menyesuaikan dengan produk akhirnya.</p><p>Kata kunci : Gossypium hirsutum, prosedur pemuliaan, produktivitas, kualitas serat, Sundapteryx biguttula, tumpangsari</p><p> </p><p><strong>ABSTRACT </strong></p><p><strong>Genetic improvement on two new cotton varieties, Kanesia 8 and Kanesia 9</strong></p><p>The main objective of cotton breeding in Indonesia is to improve productivity and fiber quality which is aimed to increase farmers' income and to make beter yam and textile quality that has to compete in international market Six crosses were made between two Indian varieties, LRA 5166 and SRT-1 with two USA vaieties, Deltapine 55 and Deltapinc Acala 90 and one Australian variety, Siokra. Individual plants, lines and individual within lines were selected on F2-F5 generations based on boll- counts, leaf-damage by jassids and fiber traits, those were conducted under rainfed and insecticide-ree condition; twelve promising lines were produced from this process. A total of 13 trials were carried out to observe performance of these new lines during 1993 to 2001; those were located in East Java and South Sulawesi using the standardized experimental techniques. By these procedures make it possible to identify several breeding lines showing simultaneous improvement in yield and fiber quality. Several tests were also made to evaluate response of those lines under intercropping with soybean and mungbean, which were located in East Java. Two breeding lines, 88003/16/2 and 92016/6 (those have been released as Kanesia 8 and Kanesia 9 in 2003), showed higher productivity and fiber quality. In average, these new vaieties produced 1.85 and 1.91 ton ha'1 seed cotton respectively or 8 to 12% higher than those on Kanesia 7, the previously released vaiety. Lint turn-out was 35.2% fiber-strength was varied from 22.6 to 24.7 gram tex'1 , fiber lengths ranged from 29.2 to 30.3 mm with lower micronaire-valucs indicating better fiber-ineness. All of those improvements represented a trend toward a higher quality iber. Kanesia 8 and Kanesia 9 also showed a slight improvement in resistance to jasssids and insect pest-complex. Kanesia 8 and Kanesia 9 performed lower competitive ability under intercropping with soybean in comparison with Kanesia 7. Under intercropping with mungbean Kanesia 8 also suffered high yield loss, wherein Kanesia 9 showed good tolerance to mungbean. The release of Kanesia 8 and Kanesia 9 is expected to give a broader choice for the cotton growers and spinning-mills to match with their inal product.</p><p>Key words: Coton (Gossypium hirsutum), breeding procedure, productivity, liber quality, Sundapteryx bigullul. inter¬ cropping.</p>
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Xu, Yun Hui, i Yong Jin Deng. "Crosslinking Properties on Oxidized Cotton Cellulose and Chitosan with Low Molecular Weight". Advanced Materials Research 332-334 (wrzesień 2011): 100–103. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.100.
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For exploiting green ecological cotton fiber products with the multifunction, a new cotton fiber crosslinked with chitosan of low molecular weight (CCCF) was prepared through the sodium periodate oxidation method. The reaction between amino groups of chitosan and aldehyde groups in the oxidized cotton cellulose occurred to obtain the CCCF in aqueous acetic acid solutions. The aldehyde group content in oxidized cotton cellulose increased markedly with the sodium periodate concentration, and the maximum weight gain of chitosan introduced on cotton fiber was 11.63% of the weight of cotton fibers. Furthermore, the crosslinking properties were respectively investigated by measurements of FT-IR and XPS spectra, the analysis indicated that the chitosan molecule was crosslinked on the surface of cotton fiber by the C=N covalent bond. This resulting CCCF is a novel ecological fiber and has more abilities of potential modification, which suggested useful information in planning applications for these modified cotton fibers.
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Silva, P. S. L., J. C. V. Silva, L. P. Carvalho, K. M. B. Silva i F. C. L. Freitas. "Weed control via intercropping with gliricidia: I. cotton crop". Planta Daninha 27, nr 1 (marzec 2009): 97–104. http://dx.doi.org/10.1590/s0100-83582009000100013.
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The majority of cotton grown commercially in the world has white lint, but recently, there has been a growing interest in colored lint cotton in several countries, including Brazil. The use of naturally-colored fiber reduces chemical pollution. The objective of this paper was to evaluate cotton cultivar fiber yield in response to weed control via intercropping with gliricídia. Cultivars BRS-Verde (greenish fibers), BRS-Rubi (reddish brown fibers), BRS-Safira (brown fibers), and BRS-187 8H (white fibers) were submitted to the following treatments: no hoeing, two hoeings (at 20 and 40 days after transplanting), and cotton intercropped with gliricídia. In the intercropped treatment, gliricídia was planted between rows of cotton plants, using one seedling pit-1, in pits spaced 50.0 cm apart. Twelve weed species predominated in the experiment, many of them belonging to the Poaceae family. Weeds occurred at different frequencies and in a non-uniform manner in the experimental area. Cultivars did not influence weed dry matter. Intercropping with gliricídia reduced weed dry matter but did not prevent reductions in cotton fiber and seed cotton yield, which were higher in hoed plots. Cultivar BRS Safira had the highest fiber yield, but no differences were observed between cultivars regarding to seed cotton yield.
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Kelly, Brendan R., i Eric F. Hequet. "Variation in the advanced fiber information system cotton fiber length-by-number distribution captured by high volume instrument fiber length parameters". Textile Research Journal 88, nr 7 (1.02.2017): 754–65. http://dx.doi.org/10.1177/0040517516688628.
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Variation in cotton fiber length impacts processability at the mill and the quality of spun yarns. The High Volume Instrument (HVI) and Advanced Fiber Information System (AFIS) are cotton fiber quality assessment instruments able to quickly assess a myriad of fiber quality characteristics. HVI testing provides the fiber length parameters most widely utilized by the cotton industry, Upper Half Mean Length and Uniformity Index. However, HVI fiber length parameters do not account for the complete within-sample variation in fiber length, such as the shortest fibers in the sample. AFIS testing is able to characterize the complete within-sample distribution of fiber length within a sample of cotton by evaluating individual fibers. Within-sample variation in fiber length is an important cotton fiber quality concern because it impacts processing performance and yarn quality. In this paper, the fiber length for 9127 commercial cotton bales was evaluated on both HVI and AFIS. The AFIS length distributions are used to characterize the complete distribution of fiber length within each bale. A novel statistical technique is introduced and is used to characterize a set of multivariate axes that characterize the total within-bale variation in fiber length among the complete set of commercial bales. These results suggest that less than half of the variation in cotton fiber length captured by the AFIS length distributions is captured by the two length parameters provided by HVI testing. If an experimental factor has no significant impact on an HVI fiber quality parameter, an alternative cotton fiber length measurement such as the AFIS length distribution should be considered.
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R., Giridharan, i Jenarthanan M.P. "Preparation and characterisation of glass and cotton fibers reinforced epoxy hybrid composites". Pigment & Resin Technology 48, nr 4 (1.07.2019): 272–76. http://dx.doi.org/10.1108/prt-05-2018-0044.
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Purpose Natural fiber composites have been proven an alternative to conventional composites in many applications such as automotive and transportation industries owing to their eco-friendliness and abundant availability. Also, they are recyclable and biodegradable. Therefore, the need for composites having superior performance is increasing consistently, which has prompted the research reported in this paper. This paper aims to fabricate and evaluate the properties of hybrid composites using glass and cotton fiber with epoxy resin. Design/methodology/approach They were prepared by hand lay-up method, using e-glass and cotton fibers. Epoxy resin used in the preparation of composites. The composites were hybridized at two weight percentages (20 and 30 Wt.%). The prepared samples were tested to evaluate its properties, such as tensile strength, flexural strength, impact strength and scanning electron microscope . Findings Microscopic examination revealed the morphological features. Hybrid fiber reinforced epoxy composite (HFREC) exhibited better mechanical properties than the individual samples. It is clear that 30 Wt.% fraction of fiber is better in mechanical properties than 20 Wt.% fraction of fiber reinforcement in both glass fiber and cotton fiber as reinforcement. Also, the hybridization of fibers resulted in increase in properties. Research limitations/implications As cotton fibers are biodegradable, recyclable and lightweight, it has many applications and is mainly used as automotive components, aerospace parts, sporting goods and building industry when reinforced with glass and epoxy. With this scenario, the obtained results of cotton fiber reinforced composites are not ignorable, which could be of potential use, as it leads to better use of available natural fibers. Originality/value This work discovered the properties of e-glass and cotton fiber reinforced epoxy resin hybrid composites (hybridized at different weight percentages), which has not been attempted so far.
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Hsieh, Y. L., X. P. Hu i A. Nguyen. "Strength and Crystalline Structure of Developing Acala Cotton". Textile Research Journal 67, nr 7 (lipiec 1997): 529–36. http://dx.doi.org/10.1177/004051759706700708.
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Single fiber strengths and crystalline structures of greenhouse-grown Maxxa Acala cotton fibers at varying stages of development and at maturity are reported and compared with those of SJ-2 cotton fibers. Single fiber breaking forces of the Maxxa variety increase most significantly during the fourth week of fiber development; these increases correlate to the 60 to 90 mg seed fiber weight range. The forces required to break single fibers are similar for the SJ-2 and Maxxa varieties through the end of the fourth week of development. Beyond 30 dpa, both single fiber breaking forces and tenacities of the Maxxa cotton fibers are higher than those of the SJ-2 cotton fibers. Four waxd peaks located near 2θ angles of 14.7, 16.6, 22.7, and 34.4° are characteristic of the 101, 101, 002, and 040 reflections of cellulose I, respectively. The 002 peak intensity increases greatly during cellulose biosynthesis, indicating improved alignment of the glucosidic rings and improved order of atoms located within the glucosidic rings as the secondary cell wall thickens. The overall crystallinity and apparent crystallite sizes normal to the 101, 101, and 002 planes increase with fiber development for both varieties. Within each variety, the single fiber breaking forces are positively related to both the overall crystallinity and crystallite sizes. Between these two varieties, increasing breaking forces and tenacities appear to be related more to crystallite size than to crystallinity.
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Hosseinali, Farzad, i J. Thomasson. "Multiscale Frictional Properties of Cotton Fibers: A Review". Fibers 6, nr 3 (13.07.2018): 49. http://dx.doi.org/10.3390/fib6030049.
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This review discusses the important concept of cotton fiber friction at both the macro- and nanoscale. First, the technological importance of fiber friction and its role in fiber breakage during fiber processing is discussed. Next, previous studies on frictional properties of cotton fibers are reviewed and different experimental procedures to measure friction between fibers or against another surface are evaluated. Friction models developed to explain friction process during various experimental procedures are considered and their limitations are discussed. Since interpretation of friction processes at the macroscale can be challenging (mainly due to difficulties in analyzing the multiple asperities in contact), a separate section is devoted to surveying studies on the emerging field of single-asperity friction experiments with atomic force microscope (AFM). Special attention is given to studies on nanoscale frictional characteristics of rough viscoelastic surfaces (e.g., plant cuticular biopolymers and cotton fibers). Due to the close relationship between friction and adhesion hysteresis at the nanoscale, adhesion studies with AFM on viscoelastic surfaces are also reviewed. Lastly, recommendations are made for future research in the field of frictional properties of cotton fibers.
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Rahman, Md Mizanur, Md Rezaur Rahman, Sinin Hamdan, Md Faruk Hossen, Josephine Chang Hui Lai i Fui Kiew Liew. "Synthesis of Cotton from Tossa Jute Fiber and Comparison with Original Cotton". International Journal of Polymer Science 2015 (2015): 1–4. http://dx.doi.org/10.1155/2015/470928.
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Cotton fibers were synthesized from tossa jute and characteristics were compared with original cotton by using FTIR and TGA. The FTIR results indicated that the peak intensity of OH group from jute cotton fibers occurred at 3336 cm−1whereas the peak intensity of original cotton fibers occurred at 3338 cm−1. This indicated that the synthesized cotton fiber properties were very similar to the original cotton fibers. The TGA result showed that maximum rate of mass loss, the onset of decomposition, end of decomposition, and activation energy of synthesized cotton were higher than original cotton. The activation energy of jute cotton fibers was higher than the original cotton fibers.
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Guan, Saipeng, Hai Zhong, Jianping Yang i Chongwen Yu. "Study on the processing of stretch-broken ramie yarns in a cotton spinning system". Textile Research Journal 87, nr 16 (11.08.2016): 2018–27. http://dx.doi.org/10.1177/0040517516663153.
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In this study, conventional long ramie fiber was stretch-broken into short fibers with lengths of 30 mm, 35 mm, 40 mm, 45 mm, and 50 mm. Then, these stretch-broken fibers were processed in a cotton spinning system. The results show that, compared to long ramie fibers processed in a conventional ramie spinning system, the stretch-broken fibers, with reasonable fiber length and high length uniformity, can be processed in a cotton spinning system with high efficiency and generally have better resultant yarn quality. For all of the stretch-broken yarns, the yarn processed from fiber with 40 mm length shows the best comprehensive performance.
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Hung, On-na, Chee-kooi Chan, Chi-wai Kan i Chun-wah Marcus Yuen. "Microscopic study of the surface morphology of CO2 laser-treated cotton and cotton/polyester blended fabric". Textile Research Journal 87, nr 9 (9.08.2016): 1107–20. http://dx.doi.org/10.1177/0040517516648511.
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This paper presents how the morphology of fibers is affected by CO2 laser treatment. The change in morphology of fibers induced by a laser affects the physical and mechanical properties of the fabric, such as water absorption, dye uptake, resistance to wrinkles and adhesion to other materials, etc. The morphology of laser-treated fibers was analyzed by scanning electron microscopy (SEM). Samples of cotton twill fabric, cotton/polyester blended twill fabric and cotton knitted fabrics with different yarn counts were studied before and after laser treatment. SEM images reveal different sizes of pores and cracks on the surface of cotton fibers. In the case of cotton/polyester blended twill fabric, the two types of fibers responded differently to laser treatment; the change in cotton fibers was slightly different from the SEM images of 100% cotton twill fabric. The number of pores and cracks on the fiber surface of cotton/polyester fabric was lower than that found in 100% cotton twill fabric. Polyester fibers melt and flow while cotton fibers are encased in resolidified polyester. For 100% cotton knitted fabrics, the thickest yarn with the lowest yarn twist exhibited the largest change when compared with fabrics knitted with lower yarn counts. The degree of change of fiber surface modification was enhanced with an increase of laser processing variables.
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Nadeem, Muhammad, Nadia Iqbal, Ummara Waheed, Zia Ullah Zia i Muqarrab Ali. "Comparative Expression Studies of Fiber Related Genes in Cotton Spp." Journal of Bioresource Management 8, nr 1 (15.03.2021): 138–53. http://dx.doi.org/10.35691/jbm.1202.0173.
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Cotton fibers are the seed trichomes that are developed around the seed and are used to make clothes and yarn for the textile industry. Expression profiling of cotton fiber genes is very important to estimate the differential gene expression level at different fiber developmental stages. Expression analysis of fiber developing genes are very important to enhance the fiber length of cotton. The expression profiling of three gene families in five stages (0, 5, 10, 15 and 20 DPA) of cotton fiber tissues was carried out through real-time PCR. Expression analysis revealed that transcripts of GA-20 Oxidase, XTH, and PEPc were elevated from 5 to 20 days post-anthesis (DPA) fibers. Total RNA was extracted from various stages of cotton fiber development and was reverse transcribed to cDNA for PCR amplification. For data normalization, 18s rRNA was used as an internal control. The objective of this study was to explore the expression level of fiber developing genes at specific stages of fiber development. The results showed that most of the genes were expressed during the elongation phase in between 5 DPA to 15 DPA. Results obtained from this study may be helpful for the further identification of fiber genes and the improvement of fiber characteristics in cotton. PEPc and XTH genes that are expressed with a high rate during the fiber development may be used in breeding programmes for the improvement of fiber quality and quantity.
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Mikučioniene, Daiva, Lina Čepukone i Daiva Milašiene. "Investigation on mechanical and thermal properties of knits from peat fibers and their combination with other natural fibers". Textile Research Journal 88, nr 14 (20.04.2017): 1660–70. http://dx.doi.org/10.1177/0040517517705633.
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Newly designed knits of highly eco-friendly peat fibers and their combination with widely used cotton and wool fibers have been analyzed in this study. The present investigation is focused on the thermal and mechanical properties of weft knits made of peat fiber yarns and their combinations (in various percentages) with other natural fiber yarns, such as cotton and woolen yarns, as well as with elastomeric yarn, as newly developed knits are designed for clothing. It was found that newly developed knitted fabrics with peat fibers have an optimal structure for use. The renewable peat fiber yarns, spun from two kinds of natural cellulose fibers – decomposed Eriophorum vaginatum (cotton grass) sedge stems and cotton – have intermediate strength and elongation values between cotton and flax yarns, and thus are fit for knitting. All the newly designed knitted fabrics have high abrasion resistance and can be used for clothing manufacture. It was found that the nature of the yarn’s raw material and the number of different yarns in one stitch influence the heat transfer dynamic. The heat transfer dynamic through the peat fiber knit is slower than that through the cotton fabric, but it is faster than through the woolen fabric. When the heat transfer process through knitted fabric is faster, this structure may be recommended for warmer seasons.
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Nafissatou, Nacoulima Lalaissa, Diouf Fatimata Hassedine, Konan N’guessan Olivier i Mergeai Guy. "Production of New Cotton Interspecific Hybrids with Enhanced Fiber Fineness". Journal of Agricultural Science 8, nr 2 (17.01.2016): 46. http://dx.doi.org/10.5539/jas.v8n2p46.
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<p>To improve cotton fiber fineness, the (<em>Gossypium hirsutum</em> L. × <em>Gossypium longicalyx </em>Hutch. & Lee)² allohexaploid and the [(<em>Gossypium hirsutum</em> L. × <em>Gossypium thurberi </em>Tod.)² × <em>G. longicalyx</em>] allotetraploid were backcrossed to <em>G. hirsutum</em> to produce introgressed genetic stocks. The ribbon width (RW) of 600 swelled fibers produced by the hybrids, their parents, and their backcross progeny were analyzed for each compared genotype using an optical microscope. The RWs varied between 6.41±2.15 µm for <em>G. longicalyx</em> to 17.45±2.98 µm for the <em>G. hirsutum</em> parent cultivar C2. Fibers produced by the trispecific hybrids and their progeny were finer than the bispecific hybrid material. For the introgressed stocks, the lowest RWs were observed for the trispecific hybrid (10.79±2.14 µm) and certain backcross progenies (between 11.98±1.27 µm to 12.71±1.61 µm). The allohexaploid RW was 13.58±1.41 µm. One of its tetraploid progeny produced approximately the same value (13.94±2.48 µm). These results show that <em>G. longicalyx </em>is a potential genetic stock for cotton fiber fineness improvement. The genetic stocks produced are valuable materials for improve the fineness of cotton fiber.</p>
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Wang, Ya Chen, Yi Wen Luo, Qi Ran Sun i Qing Hua Zhang. "Identification for Disperse Dyes on Single Cotton Fiber by SERS". Key Engineering Materials 845 (maj 2020): 109–14. http://dx.doi.org/10.4028/www.scientific.net/kem.845.109.
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In the present study, an application of Ag nanoparticles (AgNPs) in order to obtain Surface-enhanced Raman spectroscopy (SERS) of disperse dyes on single cotton fiber is presented. In detail, we prepared colloid Ag by use of citrate reduction method. Add one drop of the colloid on single colored fiber and then Raman spectra recorded with excitation wavelength at 785 nm were carried out on a Renishaw Raman spectrometer coupled to a 20x object lens. Cotton fibers dyed by disperse red 17 (DR17) and disperse blue 35 (DB35) are characterized and analyzed. This method was found out to be an effectively way to identify both DR17 and DB35 on single cotton fibers. Furthermore, SERS expands methods for identification disperse dyes on fibers, and provide a good method for verify colored cotton fibers.
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Herring, KM, i DH Richie. "Friction blisters and sock fiber composition. A double-blind study". Journal of the American Podiatric Medical Association 80, nr 2 (1.02.1990): 63–71. http://dx.doi.org/10.7547/87507315-80-2-63.
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A longitudinal double-blind study was conducted to determine the effect of sock fiber composition on the frequency and size of blistering events in long-distance runners. Thirty-five long-distance runners participated in this study. Two different socks were tested, which were identical in every aspect of construction except fiber composition. One test sock was composed of 100% acrylic fibers, and the other test sock was composed of 100% natural cotton fibers. The results showed that acrylic fiber socks were associated with fewer blistering events and smaller blisters (mm2), when compared directly to cotton fiber socks.
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Liu, Quan Xiao, Dan Xi Li i Wen Cai Xu. "Study on Effort of Ultrasonic Treatment on Water Retention Value of Pulp Fiber". Advanced Materials Research 1030-1032 (wrzesień 2014): 458–61. http://dx.doi.org/10.4028/www.scientific.net/amr.1030-1032.458.
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Effects of ultrasonic processing conditions on water retention value of bleaching coniferous wood pulp fibers, absorbent cotton pulp fiber and straw pulp fiber were discussed. Results showed that ultrasonic power and processing time have an significant impact on water retention value of three kinds of pulp, the effort of ultrasonic treatment temperature on water retention value of three kinds of pulp is less. The water retention value of bleaching coniferous wood pulp fibers, absorbent cotton pulp fiber and straw pulp fiber, respectively, reach the maximum at power of 300W, 500W, 400W, and processing time of 60min, 120min, 60min.
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YASAR, Seyhan, i Emine KARADEMIR. "DETERMINATION OF THE FACTORS LIMITING COTTON FIBER QUALITY IN TURKEY". Spring 185, nr 1 (24.05.2021): 85–99. http://dx.doi.org/10.46909/journalalse-2021-009.
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This study aims to determine the variation of fiber quality in cotton varieties produced in the Southeastern Anatolia Region and Sanliurfa, Diyarbakir provinces. 1090 fiber samples were obtained from 6 cotton varieties (Lima, Stoneville 468, Candia and Babylon for Sanliurfa, Lima, Stoneville 468, Lodos and Gloria for Diyarbakir) collected from ginning factories in Sanliurfa and Diyarbakir. Statistical analyzes were done with HVI device and obtained data were analyzed by using Excel and TOTEMSTAT programs. In the frequency distribution, cotton varieties of the region are in the medium and long fiber group in terms of fiber length. They were in the medium (only two samples), strong and very strong group in terms of fiber strength. They were generally in the medium and thick group in terms of fiber fineness (micronaire). In terms of fiber uniformity index, the majority of the fibers were in the middle group. In terms of short fiber index, most of the fibers were in the very low and low groups. The majority of the samples were in the high and medium group in terms of fiber elongation, in the mature and very mature group in terms of fiber maturity. In terms of spinning consistency index (SCI) 59,2% of the fibers were between 119,41 and 135,83; 31,3% of them, were between 135,83 and 152,24, 58,2% of the material has a reflectance value of 74 and above. All materials were in white and light-yellow groups in terms of yellowness. It has been observed that the majority of the fibers (66%) are in the low group in terms of trash count. The results obtained from the study of cotton produce of Southeastern Anatolia Region of Turkey has shown that good fiber quality and to meet the demand of textile industry.
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Jamshaid, Hafsa, Rajesh Mishra, Muhammad Zeeshan, Bilal Zahid, Sikandar Abbas Basra, Martin Tichy i Miroslav Muller. "Mechanical Performance of Knitted Hollow Composites from Recycled Cotton and Glass Fibers for Packaging Applications". Polymers 13, nr 14 (20.07.2021): 2381. http://dx.doi.org/10.3390/polym13142381.
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This research deals with the development of knitted hollow composites from recycled cotton fibers (RCF) and glass fibers (GF). These knitted hollow composites can be used for packaging of heavy weight products and components in aircrafts, marine crafts, automobiles, civil infrastructure, etc. They can also be used in medical prosthesis or in sports equipment. Glass fiber-based hollow composites can be used as an alternative to steel or wooden construction materials for interior applications. Developed composite samples were subjected to hardness, compression, flexural, and impact testing. Recycled cotton fiber, which is a waste material from industrial processes, was chosen as an ecofriendly alternative to cardboard-based packaging material. The desired mechanical performance of knitted hollow composites was achieved by changing the tube diameter and/or thickness. Glass fiber-reinforced knitted hollow composites were compared with RC fiber composites. They exhibited substantially higher compression strength as compared to cotton fiber-reinforced composites based on the fiber tensile strength. However, RC fiber-reinforced hollow composites showed higher compression modulus as compared to glass fiber-based composites due to much lower deformation during compression loading. Compression strength of both RCF- and GF-reinforced hollow composites decreases with increasing tube diameter. The RCF-based hollow composites were further compared with double-layered cardboard packaging material of similar thickness. It was observed that cotton-fiber-reinforced composites show higher compression strength, as well as compression modulus, as compared to the cardboard material of similar thickness. No brittle failure was observed during the flexural test, and samples with smaller tube diameter exhibited higher stiffness. The flexural properties of glass fiber-reinforced composites were compared with RCF composites. It was observed that GF composites exhibit superior flexural properties as compared to the cotton fiber-based samples. Flexural strength of RC fiber-reinforced hollow composites was also compared to that of cardboard packaging material. The composites from recycled cotton fibers showed substantially higher flexural stiffness as compared to double-layered cardboard material. Impact energy absorption was measured for GF and RCF composites, as well as cardboard material. All GF-reinforced composites exhibited higher absorption of impact energy as compared to RCF-based samples. Significant increase in absorption of impact energy was achieved by the specimens with higher tube thickness in the case of both types of reinforcing fibers. By comparing the impact performance of cotton fiber-based composites with cardboard packaging material, it was observed that the RC fiber-based hollow composites absorb much higher impact energy as compared to the cardboard-based packaging material. The current paper summarizes a comparative analysis of mechanical performance in the case of glass fiber-reinforced hollow composites vis-à-vis recycled cotton fiber-reinforced hollow composites. The use of recycled fibers is a positive step in the direction of ecofriendly materials and waste utilization. Their performance is compared with commercial packaging material for a possible replacement and reducing burden on the environment.
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Gurarslan, Alper, i Muhammed Erkam Narinç. "Investigating the rose oil and toluene absorption of populus fiber". Textile Research Journal 89, nr 10 (20.06.2018): 1952–63. http://dx.doi.org/10.1177/0040517518783338.
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The genus populus provides creamy white, lustrous, lightweight fibers that grow on seeds. Since populus fibers obtained from populus nigra italica are too short (0.25–0.42 cm) to be spun into yarns, populus fibers were spray coated with dimethylacetamide/Spandex solution in order to form non-woven structures. In this study, the oil absorption capacity of non-woven populus fiber pads was investigated and compared to non-woven long cotton fiber and non-woven short cotton fiber pads. The hollow structure and the oleophilic properties of populus fibers make them promising and sustainable oil absorbent candidates. The average short-term rose oil absorption capacity of non-woven populus fiber pads is 32.96798 g/g, while the long-term rose oil absorption capacity of non-woven populus fiber pads is 34.52854 g/g. Furthermore, the toluene absorption capacity of non-woven populus fiber pads is on average 23.16986 g/g for the short-term test and 24.01588 g/g for the long-term test. Moreover, non-woven populus fiber pads preserve 81.75% of rose oil even after remaining in water for 45 minutes.
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Guo, Hui Fen, Chenxiao Yang i Li Li. "Study on the dynamics of chitosan/cotton fiber in an airflow around two rotating cylinders". Textile Research Journal 88, nr 18 (20.06.2017): 2035–43. http://dx.doi.org/10.1177/0040517517715082.
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To predict chitosan/cotton yarn properties in ring spinning, a particle-level simulation method has been used to simulate the dynamics of the fibers with different initial positions in three-dimensional airflow around counter-rotating cylinders. The results show that the fibers near the cylinder end-face can leave two cylinders’ nip and move around the top cylinder, thus form fly waste. It is good to entangle other fibers as this gives the fiber greater bending energy. Compared with cotton fiber, the axial-direction deflections of the tail-ends of chitosan fibers near the cylinder center are much greater, while their bending energies are much lower, thus forming a wide triangle zone and reduced fiber–fiber cohesion force and yarn strength. To demonstrate the simulation results, a series of spinning experiments are completed, which tally with the predictions.
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Wang, Jia Fu, Yu Hong Du, Xiu Ming Jiang, Yong Heng Luo i Xing Li. "Classification Processing Method of Cotton Foreign Fibers Based on Probability Statistics and BP Neural Network". Applied Mechanics and Materials 598 (lipiec 2014): 428–31. http://dx.doi.org/10.4028/www.scientific.net/amm.598.428.
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A classification processing method of cotton foreign fibers was proposed based on probability statistics and BP neural network. Due to the origin was wide, the type was complex and the characteristic of cotton foreign fibers was different, it was difficult to build a model on classification and identification of cotton foreign fibers in the detection process of cotton spinning enterprises. This method could solve this question elegantly. Firstly, obtained the sample data by extracting the mean value of R, G, B in the fiber image and built a model about BP neural network. Then, classified 2-types cotton foreign fibers by calculating absolute value and variance of the feature vector based on probability statistics. Finally, processed the extraction features according to the different types image. The cross-validation experiment, the results show that the method combining the probability statistics and BP neural network can classify the cotton foreign fibers efficiently, and the effect is better when the types of cotton foreign fibers corresponding to the different features extraction methods The cross validation experiment, results showed that the combination can effectively identify the classification of foreign fibers and BP network based on probability and statistics, and different types of contton foreign fiber used different feature extraction methods, the effect is remarkable.
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Azizov, Shuhrat, Farhod Uzoqov, Mirshoroffiddin Mirzakarimov i Oybek Usmanov. "Analysis of Namangan 77 cotton in production line with different saw gins for short fiber yield". E3S Web of Conferences 273 (2021): 07021. http://dx.doi.org/10.1051/e3sconf/202127307021.
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For the accuracy of the results, the study was carried out for three years. The average of each factory gins was chosen. Comparison of fiber properties processed in different cotton processing plants, with different models of fiber separators. Each sample of fiber grade 1 Namangan 77 raw cotton was obtained as a result of ginning with such factory gins 4DP-130.5 DP-130, 3HDD and Lummus gins in Namangan region. The Fiber properties of all samples were measured with the Advanced HVI Fiber Information System, to determine the yield of short fibers. The main purpose of the study is to determine which model of sawing gin to produce more short fibers. For next modernization working parts of other model gin for increasing quality of fiber.
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Wang, Qin, Xiao Jiang, Elena Stojanovska, Long Di Cheng i Wen Hong Fan. "Study on Processing of Cotton / Akund Fibers Blended Yarn". Applied Mechanics and Materials 217-219 (listopad 2012): 599–602. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.599.
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Basic properties of akund fibers are introduced briefly. Cotton and akund fibers are spun into 18.45tex, 40/60 and 18.45tex, 33/67 cotton/akund blended yarns. The influence of carding processing length is studied. When the carding processing length is longer than the main length of akund fiber, the carded sliver has the lowest short fiber and neps content. This result is proved by a series of experimental tests, such as yarn tensile strength, yarn hairiness and irregularity. The results of both yarns are compared and analyzed. The overall qualities of cotton and akund /cotton blended yarn can meet the basic requirments of aparrel and home textile
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Xue, Tao, Jia Guang Meng, Yao Song i Shu Zhao. "Study on Preparation of Nano-SiC Fibers by Template Method Based on Waste Cotton Linter". Materials Science Forum 724 (czerwiec 2012): 265–68. http://dx.doi.org/10.4028/www.scientific.net/msf.724.265.
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Waste cotton linters from textile industry were used as templates to be transformed as cotton fiber/SiO complex after sol impregnation, carbonization, carbon thermal reduction reaction, to prepare nanoSiC fibers and nanoparticles. The phase of final products were identified by XRD as β-SiC, and the diameter size of nanoSiC fiber was ranged as 20~100mm analyzed by SEM and TEM. Based on the thermodynamic analysis of each step in the thermal reduction on carbon / SiO composite to generate nanoSiC fibers, the nanoSiC fibers were generated by the vapor reaction between SiO and CO, and its growth mechanism was deduced as vapor-solid. For the reuse of cotton linter, thus the research provides a new solution.
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Wei, Wei, Chen Zhang i Dexiang Deng. "Content Estimation of Foreign Fibers in Cotton Based on Deep Learning". Electronics 9, nr 11 (29.10.2020): 1795. http://dx.doi.org/10.3390/electronics9111795.
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Cotton foreign fibers directly affect the quality of a textile product; the less foreign fibers in raw cotton, the higher the quality grade of the textile product. Based on the foreign fiber clean machine, this paper proposed an evaluation method of foreign fiber content using deep learning. First of all, a large number of images of foreign fibers were collected from different production lines and annotated to obtain the mask image dataset of foreign fibers. Secondly, by comparing the image segmentation algorithm based on deep learning, tests showed that U-Net has a better performance on different segment metrics evaluations, and U-Net is improved to realize the real-time segmentation of foreign fiber images. The actual size of the foreign fiber could be calculated through the combination of the segment result and the mechanical parameters of the machine. Finally, the test results showed that the relative error between the estimated size and the actual size was less than 4%. After the prototype test, the algorithm was deployed on the actual production line and, by comparing the algorithm data in a random time with the actual foreign fiber statistical data, the overall error was less than 2%. The test showed that the new evaluation method can fully reflect the content of foreign fiber in raw cotton.
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Yan, Guang Song, Yu Heng Su i Chong Wen Yu. "A Stochastic Simulation of Cotton Combing Process". Advanced Materials Research 331 (wrzesień 2011): 31–35. http://dx.doi.org/10.4028/www.scientific.net/amr.331.31.
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The properties of plain fiber assembly are discussed, and the fiber alignment in the assembly is investigated. Some theories in yarn irregularity research are applied to the study of the random and parallel fibers in fiber assembly and a stochastic method is used to generate the fiber assembly. For a given fiber length distribution, the combing process is simulated on the basis of the plain fiber assembly. If the main parameters in cotton combing are known, the simulation can be conducted, yielding the fiber length distributions in combed cotton slivers and in waste cotton that is combed down. With the variation of combing parameters, the influence of combing parameters on the combing results can be discussed from the simulation.
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Liu, Guoyuan, Ji Liu, Wenfeng Pei, Xihua Li, Nuohan Wang, Jianjiang Ma, Xinshan Zang i in. "Analysis of the MIR160 gene family and the role of MIR160a_A05 in regulating fiber length in cotton". Planta 250, nr 6 (16.10.2019): 2147–58. http://dx.doi.org/10.1007/s00425-019-03271-7.
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Abstract Main conclusion The MIR160 family in Gossypium hirsutum and G. barbadense was characterized, and miR160a_A05 was found to increase cotton-fiber length by downregulating its target gene (ARF17) and several GH3 genes. Abstract Cotton fiber is the most important raw material for the textile industry. MicroRNAs are involved in regulating cotton-fiber development, but a role in fiber elongation has not been demonstrated. In this study, miR160a was found to be differentially expressed in elongating fibers between two interspecific (between Gossypium hirsutum and G. barbadense) backcross inbred lines (BILs) with different fiber lengths. The gene MIR160 colocalized with a previously mapped fiber-length quantitative trait locus. Its target gene ARF17 was differentially expressed between the two BILs during fiber elongation, but in the inverse fashion. Bioinformatics was used to analyze the MIR160 family in both G. hirsutum and G. barbadense. Moreover, qRT–PCR analysis identified MIR160a as the functional MIR160 gene encoding the miR160a precursor during fiber elongation. Using virus-induced gene silencing and overexpression, overexpressed MIR160a_A05 resulted in significantly longer fibers compared with wild type, whereas suppression of miR160 resulted in significantly shorter fibers. Expression levels of the target gene auxin-response factor 17 (ARF17) and related genes GH3 in the two BILs and/or the virus-infected plants demonstrated similar changes in response to modulation of miR160a level. Finally, overexpression or suppression of miR160 increased or decreased, respectively, the cellular level of indole-3-acetic acid, which is involved in fiber elongation. These results describe a specific regulatory mechanism for fiber elongation in cotton that can be utilized for future crop improvement.
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Lindström, Katarina, Therese Sjöblom, Anders Persson i Nawar Kadi. "Improving Mechanical Textile Recycling by Lubricant Pre-Treatment to Mitigate Length Loss of Fibers". Sustainability 12, nr 20 (20.10.2020): 8706. http://dx.doi.org/10.3390/su12208706.
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Although there has been some research on how to use short fibers from mechanically recycled textiles, little is known about how to preserve the length of recycled fibers, and thus maintain their properties. The aim of this study is to investigate whether a pre-treatment with lubricant could mitigate fiber length reduction from tearing. This could facilitate the spinning of a 100% recycled yarn. Additionally, this study set out to develop a new test method to assess the effect of lubricant loading. Inter-fiber cohesion was measured in a tensile tester on carded fiber webs. We used polyethylene glycol (PEG) 4000 aqueous solution as a lubricant to treat fibers and woven fabrics of cotton, polyester (PES), and cotton/polyester. Measurements of fiber length and percentage of unopened material showed the harshness and efficiency of the tearing process. Treatment with PEG 4000 decreased inter-fiber cohesion, reduced fiber length loss, and facilitated a more efficient tearing process, especially for PES. The study showed that treating fabric with PEG enabled rotor spinning of 100% recycled fibers. The inter-fiber cohesion test method suggested appropriate lubricant loadings, which were shown to mitigate tearing harshness and facilitate fabric disintegration in recycling.
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Tan, Jiafu, Sally-Anne Walford, Elizabeth S. Dennis i Danny J. Llewellyn. "Trichomes at the Base of the Petal Are Regulated by the Same Transcription Factors as Cotton Seed Fibers". Plant and Cell Physiology 61, nr 9 (24.06.2020): 1590–99. http://dx.doi.org/10.1093/pcp/pcaa082.
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Abstract Many polypetalous plants have a constriction at the base of the petal that leaves a small gap that can provide entry into the young flower bud before the reproductive organs are fully developed. In cotton (Gossypium hirsutum L.), this gap is occluded by tufts of short unicellular trichomes superficially resembling the fibers found on cotton seeds. We are just beginning to understand the developmental regulation of the seed fibers and have previously characterized several MIXTA-like MYB transcription factors (TFs) that are critical for correct seed fiber development but know little about the molecular regulation of other types of cotton trichomes. Here, using RNAi or dominant suppression transgenic cotton lines and natural fiber mutants, we investigated the development and regulation of the petal base trichomes. Petal base trichomes and seed trichomes were also examined across several different species within and outside of the Malvoideae. We found that the petal base trichomes are regulated by the same MYB TFs as cotton seed fibers and, since they are more widely distributed across different taxa than the seed fibers, could have preceded them in the evolution of these important textile fibers produced by some cotton species.
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Liu, Hai-Feng, Cheng Luo, Wu Song, Haitao Shen, Guoliang Li, Zhi-Gang He, Wen-Gang Chen i in. "Flavonoid biosynthesis controls fiber color in naturally colored cotton". PeerJ 6 (18.04.2018): e4537. http://dx.doi.org/10.7717/peerj.4537.
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The existence of only natural brown and green cotton fibers (BCF and GCF, respectively), as well as poor fiber quality, limits the use of naturally colored cotton (Gossypium hirsutum L.). A better understanding of fiber pigment regulation is needed to surmount these obstacles. In this work, transcriptome analysis and quantitative reverse transcription PCR revealed that 13 and 9 phenylpropanoid (metabolic) pathway genes were enriched during pigment synthesis, while the differential expression of phenylpropanoid (metabolic) and flavonoid metabolic pathway genes occurred among BCF, GCF, and white cotton fibers (WCF). Silencing the chalcone flavanone isomerase gene in a BCF line resulted in three fiber phenotypes among offspring of the RNAi lines: BCF, almost WCF, and GCF. The lines with almost WCF suppressed chalcone flavanone isomerase, while the lines with GCF highly expressed the glucosyl transferase (3GT) gene. Overexpression of the Gh3GT or Arabidopsis thaliana 3GT gene in BCF lines resulted in GCF. Additionally, the phenylpropanoid and flavonoid metabolites of BCF and GCF were significantly higher than those of WCF as assessed by a metabolomics analysis. Thus, the flavonoid biosynthetic pathway controls both brown and green pigmentation processes. Like natural colored fibers, the transgenic colored fibers were weaker and shorter than WCF. This study shows the potential of flavonoid pathway modifications to alter cotton fibers’ color and quality.
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Remadevi, Rechana, Stuart Gordon, Xungai Wang i Rangam Rajkhowa. "Investigation of the swelling of cotton fibers using aqueous glycine solutions". Textile Research Journal 87, nr 18 (2.09.2016): 2204–13. http://dx.doi.org/10.1177/0040517516665267.
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The treatment of cotton fibers using different chemicals, such as alkalis, acids and salt solutions, has captured the attention of researchers because of their important effects in dyeing, cross-linking and mercerizing processes. However, these agents are difficult in terms of process application and the requirement for major effluent treatment prior to discharge. In this paper, we report on the treatment of cotton in aqueous glycine solutions that were moderated, utilizing glycine’s amphoteric nature at different pH values, to enhance the morphological and moisture regain properties of cotton fiber. Treatment in an aqueous glycine solution buffered to pH 11 increased fiber ribbon width by 4.5%, cross-sectional area by 53% and moisture regain by 16%. Changes were dependent on the treatment solution pH value. This paper describes the glycine treatments and their influence on the cotton fiber cross-sectional morphology and regain properties. The results suggest that at suitable pH values aqueous glycine solutions have the ability to enhance cotton fibers in ways very similar to mercerizing.
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Sun, Yu Chai, i Zhong Cheng. "Property Analysis of Stainless Steel Fiber (Yarn) and its Effect on Knitting Process". Advanced Materials Research 1053 (październik 2014): 93–96. http://dx.doi.org/10.4028/www.scientific.net/amr.1053.93.
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In this paper the frictional and tensile properties of stainless-steel fiber, cotton fiber, polyester fiber and rayon fiber, as well as the tensile and surface hairy properties of stainless-steel yarn, cotton yarn and wool yarn were tested and compared. Experimental results shown that the stainless-steel fiber has greater density, friction coefficient and tensile breakage strength but smaller breaking elongation. On the basis of summarizing the differences between stainless-steel fiber (yarn) and conventional textile fibers (yarns), difficulties occurred during knitting process were analyzed and the corresponding solutions were proposed.
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Wu, Zheng, Chun Yan Wei i Zhi Fang Tian. "Preparation and Mechanical Properties of Cotton Stalk Bast Fibers Reinforced Polylactic Acid Biodegradable Composites". Advanced Materials Research 399-401 (listopad 2011): 1367–71. http://dx.doi.org/10.4028/www.scientific.net/amr.399-401.1367.
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The cotton stalks bast fiber was a new kind of natural cellulose fiber, the fibers had the similar properties as the flax fibers. Polylactic acid (PLA) is a class of biodegradable matrix material. As the flax fibers can be reinforced materials and then compounded with PLA, cotton stalks bast fibers as reinforced materials and PLA as matrix were used to make a kind of green and biodegradable composite in the experiment. The composites were prepared by mixing, molding and cold forming. Orthogonal experiment table including length of the fibers, mass fraction of PLA, molding temperature and molding pressure was devised. Then the tensile strength, flexural strength and impact strength were tested and the analysis of range and variance was done. The optimal processing condition was obtained as follows: length of the fibers was 6mm, mass fraction of PLA was 75%, molding temperature was 175°C and molding pressure was 12MPa. The result showed that the cotton stalks bast fibers reinforced PLA biodegradable composites had good mechanical properties. Through this study waste cotton stalks basts were turned into useful resources and provided a kind of environmentally friendly composites.
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Serra, Albert, Quim Tarrés, Miquel Llop, Rafel Reixach, Pere Mutjé i Francesc X. Espinach. "Recycling dyed cotton textile byproduct fibers as polypropylene reinforcement". Textile Research Journal 89, nr 11 (11.07.2018): 2113–25. http://dx.doi.org/10.1177/0040517518786278.
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The textile industry generates a large amount of byproducts that must be treated before being recycled or disposed of. The treatments to extract the dyeing agents are mandatory, and involve costs and interaction with toxic reagents. A relevant amount of such byproducts are short cotton dyed fibers. Cotton fibers are high-quality cellulosic fibers and can be used as composite reinforcement. In this paper, dyed cotton fibers were used to formulate, obtain and tensile test composite materials. The impact of the presence of dyes was studied and such dyes enhanced the interphase between the matrix and the reinforcement. On the other hand, when a coupling agent was incorporated to the formulation of the composites, the dyes hindered the chemical interactions between the maleic acid and the OH groups of the cellulosic fibers. Nonetheless, the composite materials showed competitive mechanical properties that were better than other natural fiber-reinforced composites and comparable to some glass fiber-based ones. Dyed cotton fibers can be used as reinforcement without further treatment, increasing the value chain of the textile industry and decreasing the chemical treatments necessary to recycle or dispose of dyed textile fibers.
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Yuan, Hai Yan, Min Rong Liu i Guo Zhong Li. "Study on Properties of Crops Fiber/Gypsum Composites". Advanced Materials Research 306-307 (sierpień 2011): 762–65. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.762.
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This work aims to evaluate the effect of cotton stalk fibers with styrene acrylic emulsion treatment, slag and ordinary Portland cement on the properties of crops fiber/gypsum composites. The results show that crops fibers with surface treatment, slag and ordinary Portland cement can increase the bending strength and improve the water-proof property of crops fiber/gypsum composites obviously. The fracture surface of crops fiber/gypsum composites were observed by SEM, and the action mechanism of the crops fibers, slag and ordinary Portland cement on crops fiber/gypsum composites were discussed.
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Siddique, Sheraz Hussain, Dr Saira Faisal, Bilal Zahid i Chunhong Wang. "Tensile Properties of Bagasse Fiber Composites". July 2021 40, nr 3 (1.07.2021): 502–11. http://dx.doi.org/10.22581/muet1982.2103.05.
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Bagasse is a waste generated in abundance from the sugarcane industry. This investigation was planned to convert bagasse waste into a useful composite. For this purpose the bagasse waste was obtained from sugar cane juice producer. In this study, the extraction of bagasse fibers was done manually and they were treated with sodium hydroxide. The treated bagasse fibers had higher tensile properties as compared to untreated ones, so the alkali treated fibers were used as reinforcement for making composites. Hand lay-up technique was used to manufacture bagasse composite samples. The fiber length (1 inch and 2 inch) and fiber weight percentage (10 wt% and 20 wt%) were considered as variables. It was found that better tensile properties were obtained with higher fiber length (2 inch) and weight percentage (20 wt%). Bagasse-cotton fabric composites were also produced using cotton fabric as a base material and the bagasse fibers were sandwiched between a printed and plain cotton fabric. The idea was to consider these composites useful for sun-shades or for decorative purposes. It was also found that bagasse-cotton fabric reinforced composites had higher tensile strength and strain; however the modulus had reduced due to higher elongation of cotton fabrics. With the increase in the weight percentage the tensile properties had reduced this might be because during the composite manufacturing the epoxy resin had to pass through the fabric to wet the bagasse fiber out and they were not wetted out properly. This phenomenon needs further investigation.
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Björquist, Stina, Julia Aronsson, Gunnar Henriksson i Anders Persson. "Textile qualities of regenerated cellulose fibers from cotton waste pulp". Textile Research Journal 88, nr 21 (28.07.2017): 2485–92. http://dx.doi.org/10.1177/0040517517723021.
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Cotton is not the answer to meet the rapidly growing demand for textile fibers. Wood-based regenerated cellulose fibers are an attractive alternative. Since wood is a candidate to replace fossil raw materials in so many applications of the circular economy, other sources need investigation. Cotton linters work in the viscose process – can cotton waste be used to make dissolving pulp? We describe the textile qualities of lyocell fibers from (i) pure cotton waste pulp and (ii) blending with conventional dissolving pulp. The staple fibers were tensile tested, yarns spun and tensile tested and knitted, and tested for shrinkage, water and dye sorption, abrasion resistance, fuzzing and pilling, staining and fastness. TENCEL® staple fibers and off-the-shelf TENCEL® yarn were used as references. The results show that the two study fibers had tenacity and an E-modulus that exceeded the staple fiber reference. Also, the study yarns were at least as good as the spun reference yarn and the commercial off-the-shelf yarn in terms of wet tenacity. Single jerseys made from the study yarns shrunk less upon laundering, which is surprising since they could absorb at least as much water at a comparable rate as the references. Dyeability, staining and color fastness, durability and pilling tendency showed that the two study fiber tricots performed at least as good as the references. This study suggests that cotton waste is a promising candidate for special grade pulp to suit niche regenerated fiber products or to spice up conventional wood-based dissolving pulp.
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Yuan, Xiao Hong, Ying Jin Gan, Dong Sheng Chen i Yuan Jing Ye. "Analysis on Mechanical Properties of Lotus Fibers". Advanced Materials Research 476-478 (luty 2012): 1905–9. http://dx.doi.org/10.4028/www.scientific.net/amr.476-478.1905.
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To understand the fundamental mechanical properties of lotus fiber could provide theoretical basis for developing lotus fiber fabric. This paper is focused on the mechanical properties of lotus fiber under the state of wet, dry and normal temperature, which include the single tensile properties, the repeated tensile stress properties under constant elongation, stress relaxation and creep properties, and have comparation and analysis on the cotton fiber and the viscose fiber. The conclusion shows that the lotus fiber and viscose fiber are more effect by humidity than the cotton fiber. The fibre strength of lotus fiber was the biggest than cotton fiber and viscose fiber under the normal temperature and dry state. The elongation at break of viscose fiber was the biggest than lotus fiber and cotton fiber under the state of wet, dry and normal temperature. From wet state to normal temperature state to dry state, the fiber strength of lotus fiber increase gradually, and elongation at break gradually decreased. The plastic deformation resistance ability, the stress relaxation and creep properties of bamboo pulp fiber under wet state are best, and the dry condition are the worst.