Relevant bibliographies by topics / Cellulose fibers. Papermaking

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Academic literature on the topic 'Cellulose fibers. Papermaking'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Cellulose fibers. Papermaking"

1

Bidin, Nordiah, Muta Harah Zakaria, Japar Sidik Bujang, and Nur Aznadia Abdul Aziz. "Suitability of Aquatic Plant Fibers for Handmade Papermaking." International Journal of Polymer Science 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/165868.

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Increasing concerns for future fiber supplies in pulp and paper industries has shifted interest in nonwood sources from agriculture residues and aquatic plants. Aquatic plants with short growth cycles, in abundance, and with low lignin are a potential fiber source. Five aquatic plant species,Cyperus digitatus, Cyperus halpan, Cyperus rotundus, Scirpus grossus, andTypha angustifolia, were examined for fiber dimensions and chemical composition (cellulose, lignin) and compared with other nonwood plants. All aquatic plants possessed short (length, 0.71–0.83 mm) and thin (diameter, 9.13–12.11 µm) fibers, narrow lumen (diameter, 4.32–7.30 µm), and thin cell wall (thickness, 2.25–2.83 µm) compared with most other nonwood plants. Slenderness ratio ranged from 73.77 to 89.34 withTypha angustifoliahaving the highest ratio. Except forScirpus grossus, the flexibility coefficient ranged from 52.91 to 58.08.Scirpus grossushas low Runkel ratio, 0.84 ± 0.17. Fiber characteristics, short and thin fibers, Slenderness ratio >60, flexibility coefficient within 50–75, and Runkel ratio <1, are suitable for papermaking. Cellulose content ofCyperus rotundus(42.58 ± 1.32%),Scirpus grossus(36.21 ± 2.81%), andTypha angustifolia(44.05 ± 0.49%) >34% is suitable for pulp and papermaking. Lignin content in aquatic plants in the present study ranged 9.54–20.04% and below the wood lignin content of <23–30% encountered in pulp and papermaking. Handmade paper sheets produced for paperboard, craft, and decorative purposes are with permissible tensile strength, breaking length, and low moisture content.
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2

Dong, Chao, Ying Ye, Li Ying Qian, Bei Hai He та Hui Ning Xiao. "Preparation, Characterization of Cellulose Fibers Grafting by β-Cyclodextrin and their Application for Antibacterial Products". Advanced Materials Research 936 (червень 2014): 784–88. http://dx.doi.org/10.4028/www.scientific.net/amr.936.784.

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Cyclodextrins (CDs) can form inclusion complexes with a variety of molecules making them very attractive in different areas, such as pharmaceutics, biochemistry, food chemistry and papermaking. In this communication the preparation of β-cyclodextrin-grafted cellulose fibers was carried out by reacting β-cyclodextrin with cellulose fiber via citric acid (CA). Both fourier transform infrared (FTIR) and cross polarization magic angle spinning solid state nuclear magnetic resonance (CP-MAS NMR) indicated that β-CDs had been chemically attached to cellulose backbone through the formation of ester bonds. Furthermore, the β-CD-grafted cellulose fibers formed inclusion complexes with ciprofloxacin hydrochloride (CipHCl). And the β-CD-grafted cellulose fibers loaded with CipHCl showed excellent antibacterial activity against E.coli and S.aureus.
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3

Chen, Wen Shuai, Hai Peng Yu, Peng Chen, et al. "Preparation and Morphological Characteristics of Cellulose Micro/Nano Fibrils." Materials Science Forum 675-677 (February 2011): 255–58. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.255.

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Cellulose micro/nano fibrils generated from biomass are relative new reinforcing materials for polymer composites, which have potential lightweight and high strength and are renewable. In the present study, the preparation method of extracting cellulose micro/nano fibrils from wood was introduced. After successful disintegration, the morphological characteristics of the wood fibers, purified cellulose fibers, cellulose fibers activated by ultrasonic-wave and cellulose micro/nano fibrils after homogenization treatment, were compared by visual examination and scanning electron microscopy. The results showed that cellulose micro/nano fibrils have been efficiently extracted from wood, which have great potential in the application areas of papermaking, bio-nanocomposites, food, cosmetics/skin cream, medical/pharmaceutical, and so on.
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4

Ganser, Christian, Ulrich Hirn, Sebastian Rohm, Robert Schennach, and Christian Teichert. "AFM nanoindentation of pulp fibers and thin cellulose films at varying relative humidity." Holzforschung 68, no. 1 (2014): 53–60. http://dx.doi.org/10.1515/hf-2013-0014.

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Abstract In papermaking, the formation of bonds between single pulp fibers is influenced by the hardness of the fibers in their wet state. In this work, transversal hardness and modulus of pulp fibers have been studied via atomic force microscopy-based nanoindentation in dependence on relative humidity (RH). Additionally, the change in hardness of cellulose and xylan/cellulose model films was also investigated as a function of swelling in the presence of water and calcium chloride (CaCl2) solution. The hardness of pulp fibers is decreasing slowly from 240 MPa at 5% RH to 90 MPa at 80% RH and exhibits a distinct decrease to 2.7 MPa at the fully wet state. The hardness in water is reduced by a factor of almost 100 compared with the dry state; therefore, a form change is easily possible and facilitates the formation of hydrogen bonds on the fiber surfaces. The investigations on the model films reveal that pure cellulose hardens in the CaCl2 solution, compared with distilled water, whereas xylan on cellulose is becoming softer.
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5

Zambrano, Franklin, Heather Starkey, Yuhan Wang, et al. "Using micro- and nanofibrillated cellulose as a means to reduce weight of paper products: A review." BioResources 15, no. 2 (2020): 4553–90. http://dx.doi.org/10.15376/biores.15.2.zambrano.

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Based on publications related to the use of micro- and nanofibrillated cellulose (MNFC) in papermaking applications, three sets of parameters (intrinsic and extrinsic variables, furnish composition, and degree of dispersion) were proposed. This holistic approach intends to facilitate understanding and manipulation of the main factors describing the colloidal behavior in systems comprising of MNFC, pulp fibers, and additives, which directly impact paper product performance. A preliminary techno-economic assessment showed that cost reductions driven by the addition of MNFC in paper furnishes could be as high as USD 149 per ton of fiber (up to 20% fiber reduction without adverse effects on paper’s strength) depending on the cost of papermaking fibers. It was also determined that better performance in terms of strength development associated with a higher degree of MNFC fibrillation offset its high manufacturing cost. However, there is a limit from which additional fibrillation does not seem to contribute to further strength gains that can justify the increasing production cost. Further research is needed regarding raw materials, degree of fibrillation, and combination with polyelectrolytes to further explore the potential of MNFC for the reduction of weight of paper products.
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6

Лебедев (Lebedev), Иван (Ivan) Владимирович (Vladimirovich), Яков (Yakov) Владимирович (Vladimirovich) Казаков (Kazakov), Дмитрий (Dmitrij) Германович (Germanovich) Чухчин (Chukhchin), and Кристина (Kristina) Александровна (Аleksandrovna) Романенко (Romanenko). "THE ROLE OF FIBERS SURFACE IN DEVELOPMENT OF PAPERMAKING PROPERTIES OF TECHNICAL PULP IN THE REFINING PROCESS." chemistry of plant raw material, no. 2 (January 15, 2018): 207–16. http://dx.doi.org/10.14258/jcprm.2018022248.

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The aim of this work was to determine the relationship between the values of the fiber specific surface and papermaking properties of the pulp that are changing in the refining process. Quality data on the status and quantitative data on the value of the fibers specific surface for softwood and hardwood kraft pulp with different lignin content and different degree of refining were obtained. When preparing samples was used technology of cryofixation and freeze-drying the wet laboratory samples. The SEM-images of the cellulose fibers surface in the state such as for the sheet forming, obtained on scanning electron microscope ZEISS "SIGMA VP". The SEM-images shows just noticeable difference in development of the fibers surface in the beating process. This is manifested in an increase in the number of microfibrils on the fiber surface. Quantitative data were obtained on the automatic analyzer of the specific surface magnitude ASAP. A visually apparent increase of the surface when beating technical cellulose confirmed quantitatively. The value of the specific surface area increased from 2 m2/g for cellulose after the dispergation into pulp of up to 4...6 m2/g after refining up to 60 °SR. Removal of lignin from cellulose promotes more intensive development of the surface during refining.For different kinds of pulp, similar dependences of physical-mechanical properties (interfiber bonding forces, bulk density, modulus of elasticity) of laboratory samples and specific surface data, which change during refining, are established.The main influence on the change in the structural-dimensional and elastic properties of paper during refining is exerted by an increase in the content of microfibrils on the outer surface of the fibers. The tightness of the correlation and the nature of the observed dependence depends on the wood species from which the cellulose is derived, on the lignin content of the samples, and on the drying method. For softwood pulp, the tightness of the relationship is higher than for hardwood pulp.
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7

Housseinpour, Reza, Ahmad Jahan Latibari, Ramin Farnood, Pedram Fatehi, and S. Javad Sepiddehdam. "Fiber Morphology and Chemical Composition of Rapeseed (Brassica Napus) Stems." IAWA Journal 31, no. 4 (2010): 457–64. http://dx.doi.org/10.1163/22941932-90000035.

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Rapeseed (Brassica napus L.) stalks are widely available. Data on their fiber morphology and chemical composition is important to establish their best performance during pulping. This study found that average fiber length, fiber width, cell wall thickness, and lumen width of rapeseed were 1.32 mm, 31 μm, 5.75 μm, and 19.5 μm, respectively. Rapeseed fibers appear almost identical to wood fibers, but the accompanying vessel elements and parenchyma cells mean that small particles (fines) will be produced during refining. The chemical analysis of depithed rapeseed stalks showed that the cellulose, lignin, holocellulose, pentosan, and ash were 48.5%, 20%, 77.5%, 17%, and 6.6%, respectively. Alcoholacetone, hot water, cold water, and 1%-NaOH solubility were 6.6%, 5%, 13.8%, and 50.3%, respectively. These results indicate rapeseed stalks are suitable for pulping and papermaking.
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8

Ulfa, Maria, and Koriatul Isnaini. "The Effect of Soda Pulping Variables on Pulp Properties of Coir Fiber." Acta Chimica Asiana 3, no. 2 (2020): 170. http://dx.doi.org/10.29303/aca.v3i2.47.

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Abstract The potential use of coir fiber for pulping and papermaking has been investigated. This research aimed to study effects of pulping processing variables (temperature, pulping time, and alkali charge/solvent pulping) on the properties of pulp (residual lignin, alpha cellulose, kappa number and pulp yield) from coir fiber. For this purpose, the coir fibers were cooked using alkali charge (10 to 20% oven dried, as NaOH), pulping time from 60 to 120 min and temperature from 65 to 180oC. Results indicated that alkali charge and pulping time gave more impact on the properties of pulp than temperature. Pulping at high temperature, long pulping time, and high alkali charge resulted in decreasing of lignin, pulp yield, and kappa number but instead on alpha cellulose content.
 Keywords: coir, soda pulping, lignin
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9

Colin Chavez, Citlali, Herlinda Soto Valdez, Armida Rodríguez Féliz, et al. "Papermaking as Potential Use of Fibers from Mexican Opuntia ficus-indica Waste." Biotecnia 23, no. 1 (2021): 141–50. http://dx.doi.org/10.18633/biotecnia.v23i1.1315.

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The papermaking potential of Opuntia ficus-indica (OFI) waste fibers was studied in this research. Alpha cellulose, lignin, hollocellulose, ethanol/benzene extractives and ash content were determined as 53.7±0.1%, 2.4±0.3%, 61.6±5.7%, 7.1±0.3% and 26.4±0.1%, respectively. The average fiber length, width, lumen and cell wall thickenss were found to be 1.1±0.3 mm, 18.8±6.1µm, 12.1±5.4 µm, 4.3±1.0 µm. Soda pulping was conducted using 20 and 28% sodium hydroxide, cooking temperatures of 160 and 175 °C, cooking times of 60 and 120 min, and liquor- to fiber ratio of 9:1. Soda pulping with 28% sodium hydroxide, 175 °C and 120 min showed a lower Kappa number of 29.60±1.7 and a total yield of 32.2±1.6 %. In general, tensile strength index (36.0±5.0 Nm/g), stretch (1.7±0.3%), breaking length (3.7±0.5 km), burst index (3.2±0.4 KPa.m2/g), tear index (7.3±0.0 mN.m2/g), folding endurance (166 times) and porosity (> 120 s) of OFI pulp were comparable with wood and non-wood pulps.
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10

Sheng, Jie, Ruibin Wang, and Rendang Yang. "Physicochemical Properties of Cellulose Separators for Lithium Ion Battery: Comparison with Celgard2325." Materials 12, no. 1 (2018): 2. http://dx.doi.org/10.3390/ma12010002.

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High electrolyte wettability, thermal dimensional stability, and tensile strength are prerequisites for implementing separators in practical applications. In this study, we report on the discovery of nanofibril membranes derived from various plant fibers commonly used in the papermaking industry, for low cost and higher performances than the commercially available Celgard2325 in regard to the application of separators for lithium-ion batteries. Nanofibril membranes showed water contact angles as low as 18°, negligible size change at a heating temperature of 160 °C for 120 min, and tensile strength up to 137.6 MPa. The homogenization was found to strongly contribute to these improved performances. These findings suggest that the plant fiber-derived nanofibril membranes are anticipated to be promising candidates as separators for lithium-ion batteries.
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