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Academic literature on the topic 'Natural dyes'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 January 2023

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Journal articles on the topic "Natural dyes"

1

Dehnavi, E., A. Shams-Nateri, and H. Khalili. "Wool dyeing with binary mixture of natural dyes." Pigment & Resin Technology 45, no. 1 (January 4, 2016): 52–61. http://dx.doi.org/10.1108/prt-06-2014-0045.

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Purpose – This paper aims to focus on the absorption behaviour of single and binary mixtures of natural dyes on wool. Natural dyes are multi-components with different structures and properties. Design/methodology/approach – In this research, the absorption behaviour of single and binary mixtures of natural dyes was investigated on wool fibre. Study was conducted via some natural dyes, including pomegranate peel as a yellow natural dye with tannin, weld as a yellow natural dye without tannin and madder as a red natural dye without tannin. Applied mordant was alum, which was used in the pre-mordant method. Different shades were obtained by varying dye concentration in the binary mixture. The effect of tannin on absorption behaviour of binary mixture of natural dyes was investigated by spectral reflectance and colour parameters of dyed samples measurements. Findings – Obtained results indicate that tannin affects the absorption behaviour of natural dyes in binary mixtures. Practical implications – Because natural dyes are multi-components with different structure and properties, the study of compatibility and absorption behaviour of natural dyes in binary mixture on wool is important in applied researches. Originality/value – The study of compatibility and absorption behaviour of binary mixture of natural dyes on wool is novel.

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Nintasari, Rinne, and Desi Mustika Amaliyah. "EKTRAKSI ZAT WARNA ALAM DARI KAYU ULIN (Eusideroxylon zwageri), KAYU SECANG (Caesalpinia sp) DAN KAYU MENGKUDU (Morinda citrifolia) UNTUK BAHAN WARNA KAIN SASIRANGAN." Jurnal Riset Industri Hasil Hutan 8, no. 1 (July 1, 2016): 25. http://dx.doi.org/10.24111/jrihh.v8i1.2065.

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Natural Dyes Extraction from Ulin Wood (Eusideroxylon zwageri), Secang Wood (Caesalpinia sp ) and Noni Wood (Morinda citrifolia ) for SasiranganNatural dyes have a beautiful and distinctive color that hard to imitate with synthetic colors. Natural dyes have been recommended as a dyes that safe for the environment and human health. It contains natural components that relatively low pollution load, easily biodegradable and non-toxic. The aim of this research is to identify the adsorption of natural dyes from ulin wood (Eusideroxylon zwageri), secang wood (Caesalpinia sappan) and mengkudu wood (Morinda citrifolia) to cotton and satin material by extrac and soaking processes. The results of organoleptic test showed that people prefers dyed satin than dyed cotton because the dyed colour in satin is brighter than in. The adsorption of dye in satin ranges from 1.81% to 5.68%, while in cotton ranges from 1.35% to 1.93%. The results showed that fabric with smaller size of fiber/yarn will have a higher colour adsorbtion rate because the dyes are easier to adsorb.Keywords: extraction, natural dyes, fabric, sasirangan

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Nerlekar, Nisha A. "Production of Natural Dye from Beet Roots (BETA VULGARIS L.) by using different Mordants." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (June 10, 2021): 466–73. http://dx.doi.org/10.22214/ijraset.2021.34842.

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Dyes can be derived from nature by different part of plants. Natural dyes give the color like cool, warm colors that are with unique combinations. Dyes are made from natural resources like plants, animals, and minerals tend to produce colors that wash out easily. With most natural dyes, a mordant can be used to make color more permanent. In the mordanting process the fiber of wool, cotton is treated with a solution of a metal salt (usually an aluminum, chromium, copper, iron, or tin salt). Then the fiber is dyed with natural colors. Metals ions which are present in the salt form strong bonds with the fiber and also with the dye, therefore holding the dye to the fiber. In this activity, we can easily extract colored compounds from plant materials; use them to dye white cloths. A small difference in the dyeing technique or the use of different mordants with the same dye can shift the colors of a wide range or create new colors, which are not easily possible with synthetic dyes. Natural dyes are usually moth proof and can replace synthetic dyes in kid garments and food stuff for safety which have allergy to synthetic dyes.

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Bhattacharya, Dr Sumanta. "Analysis of Enervation Conduct of Indian Maddar Natural Dye on Silk Fabric." International Journal for Research in Applied Science and Engineering Technology 9, no. 11 (November 30, 2021): 1073–81. http://dx.doi.org/10.22214/ijraset.2021.38967.

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Abstract: Dying is a popular practice in textile industry which is prevalent at all parts of the world from the period of ancient civilization. Initially, natural dyes i.e. dye derived from natural resources like vegetables, flowers, minerals, plants etc. were used. Now-a-days, due to technological and scientific innovations synthetic dyes are processed at large scale in the laboratories as it is still one of the most profitable industry globally. However, the rapid utilization of chemicals in textile industry for production of synthetic dyes causes degradation of environment like soil pollution, water pollution etc. Hence, it is necessary to promote the utilization of natural dyes globally. In this paper, the bleached silk fabric was dyed with Indian Madder natural dye at different temperature and the colour strength is measured spectrophotometrically in order to study the effectiveness of the dye. Keywords: Natural dye, bleached silk fabric, Indian Madder, Colour strength

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Wiriya-Amornchai, Atiwat, Nattakarn Hongsriphan, and Pajeara Pattanatabutr. "Natural Dyeing of Wood Fibers for Green Biocomposites." Advanced Materials Research 488-489 (March 2012): 511–14. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.511.

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In this study, the mechanical and thermal properties of green biocomposites adding natural dye were investigated by tensile test and Differential Scanning Calorimetry (DSC). Poly(lactic acid), one of biodegradable polymers recently been interested for replacing petroleum-based polymers, was compounded with wood fibers to produce biocomposite, and natural dyes were introduced to improve appearance of biocomposite. Pine wood fibers were dyed with three types of natural dyes; yellow color from heartwood of Jackfruit tree, red color from Sappan wood, and blue color from Indigo blue. Prior compounding, original and dyed wood fibers were treated with silane to improve compatibility between wood fiber and polymer matrix. It is found that %crystallinity of alkali-treated and natural dyed wood/PLA biocomposites were significantly higher than original wood/PLA biocomposites. The modulus and tensile strength of natural dyed wood poly (lactic acid) composites were in the same level of alkali-treated wood composites; however, elongation at break was improved by natural dye.

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Kabir, Shekh Mamun, Mahabub Hasan, and Zulhash Uddin. "Novel Approach to Dye Polyethylene Terephthalate (PET) Fabric in Supercritical Carbon Dioxide with Natural Curcuminoid Dyes." Fibres and Textiles in Eastern Europe 27, no. 3(135) (June 30, 2019): 65–70. http://dx.doi.org/10.5604/01.3001.0013.0744.

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The use of natural dyes has increased in the last few decades due to the eco-friendly approach of dyeing. There are still some limitations that are associated with natural dyes, such as dyeing efficiency, reproducibility of shades, process complexity, availability etc. The main problem associated with the dyeing property of natural dyes is “low exhaustion”. In this study, natural dyestuff from Curcuma longa L. was extracted and polyethylene terephthalate fabric was dyed with it in the same bath by employing the supercritical carbon dioxide method. The method was developed to improve the dye-ability of natural dyes and reduce the process time and effluent. Curcuminoid dye exhaustion on PET fabric showed almost 80% by using supercritical carbon dioxide dyeing methods, and the highest colour strength (K/S = 12) was obtained. Coloured polyethylene terephthalate fabric treated with supercritical carbon dioxide showed deeper shades (L* = 72.92) and better fastness properties as compared with high temperature exhaust dyeing methods.

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Maghfiroh, Maghfiroh, Mutadin Mutadin, and Sri Puji Astuti. "ANALISIS KUALITAS DAN KETAHANAN LUNTUR WARNA BATIK HASIL PROSES REUSE SISA LARUTAN CELUP ZAT WARNA SINTETIS GOLONGAN BEJANA MENUJU GREEN INDUSTRY." Pena Jurnal Ilmu Pengetahuan dan Teknologi 34, no. 1 (April 1, 2020): 24. http://dx.doi.org/10.31941/jurnalpena.v34i1.996.

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<p>It has been found the fact that natural dyes are not environmentally friendly dyes if they are directly discharged into the water without undergoing processing. Theoretically, both synthetic dyes and natural dyes have the same opportunity to cause pollution of aquatic ecosystems because they have the same functional groups. So far, natural dyes are considered environmentally friendly not because of the low waste pollutant parameters, but because there is a process of reuse of the remaining dyed water. The process of reusing the remaining dye solution can reduce the volume of liquid waste discharged into the water. This study aims to reuse of the remaining water dyed synthetic of vat dyes for the process of making batik. The quality of the staining results is evaluated by color fastness test on washing and rubbing. The reusing synthetic of vat dyes group is done for coloring cotton fabrics. The fabric color evaluation stage is carried out to test the color intensity and fastness of synthetic dyes of vat dyes group if the dye is reused in the batik process. Color intensity test was carried out by UV-PC spectrophotometer, color fastness test on washing use gray scale, and color fastness test on dry rubbing use staining scale. Based on the color intensity test, the process of reusing the remaining dye solution of the indantren navy blue R is still optimal if used on the same day. Reusing the remaining dye solution the next day gives a large value of color intensity value from the use of the dye solution for the first time. Indantren navy blue R color substances are relatively resistant to hydrolysis reactions during the dissolution process in water.</p>

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Ujjin, Suchada, and Suesat Jantip. "Study on the Dyeing Properties of Poly(Lactic Acid) and Silk Yarns with Natural Dyes." Advanced Materials Research 486 (March 2012): 384–87. http://dx.doi.org/10.4028/www.scientific.net/amr.486.384.

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This research aimed to study the dyeing properties on the PLA and silk yarns of the natural dyes obtained from various materials, viz. marigold petals (Tagetes erecta L.), rhubarb rhizomes (Radix et Rhizoma Rhei), garcinia barks (Garcinia Dulcis Kurz), turmeric rhizomes (Curcuma Longa Linn.), sappan barks (Caesalpinia sappan Linn.) and catechu barks (Acacia catechu Willd.). The color properties of the dyed yarns was determined and compared. The results observed the different color properties (L*, a* and b* values) and a shift of λmaxof the dyes on the PLA and silk yarns. This change in color properties of each natural dye was expected to be affected by the types of substrate (textile fiber) and also the chemical nature of the natural dyes. The study of the build-up properties indicated that the turmeric dye is the only natural dye which showed an outstanding performance on PLA and silk. A high degree of color yield of turmeric dye was obtained on both yarns, whereas a poor build-up was observed for the rest of the dyes.

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Manicketh, Tintu Jose, and Mannancheril Sebastian Francis. "Extraction of natural colorants from Araucaria columnaris, Macaranga peltata and Averrhoa bilimbi for textile coloration." International Journal of Clothing Science and Technology 32, no. 6 (May 5, 2020): 789–801. http://dx.doi.org/10.1108/ijcst-06-2019-0075.

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PurposeThe paper aims to investigate the feasibility of developing natural dyes from the barks of Araucaria columnaris and leaves of Macaranga peltata, Averrhoa bilimbi. The paper also deals with the application of natural dyes in textile coloration.Design/methodology/approachDye extraction was carried out using the aqueous method. The dyeability of the aqueous extract was assessed on cotton, silk and polyester yarns using different mordants (alum, acetic acid, CuSO4, lemon juice) and without mordant. UV–Visible spectral analysis and pH of different natural dyes were determined. Percent absorption, K/S values, CIELab values and fastness properties of the selected dyed yarns were also assessed.FindingsThe percentage values for dye exhaustion differed with various mordants. The K/S values were found to be influenced by the addition of mordants. Different hues were obtained with the usage of different mordants. Fastness results exhibited good to very good grades.Research limitations/implicationsThe effective application of aqueous method of dye extraction in the study avoids solvent toxicity. The current results proved that the dyeing could be achieved at room temperature for different yarns (cotton, silk, polyester). At present, no report exists in the literature of research work on the extraction of natural dyes from the leaves of M. peltata, A. bilimbi and their dyeing potential on cotton, silk and polyester.Practical implicationsThe present work offers new environment-friendly dye as well as simple dyeing method. Barks and leaves are promising sources of dye. Enormous availability of barks and leaves avoids the exploitation of the plant parts for the extraction of natural dyes.Originality/valueThe important feature of this study was the effective dyeing of natural and synthetic fibers at room temperature. The novel sources of natural dyes would contribute significantly to the existing knowledge of dyeing, and the natural dyes reduce the environmental impact of synthetic dyes.

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Zhao, Zhong, Chris Hurren, Mingwen Zhang, Liming Zhou, Jihong Wu, and Lu Sun. "In Situ Synthesis of a Double-Layer Chitosan Coating on Cotton Fabric to Improve the Color Fastness of Sodium Copper Chlorophyllin." Materials 13, no. 23 (November 26, 2020): 5365. http://dx.doi.org/10.3390/ma13235365.

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Natural dye’s poor affinity for cotton and poor fastness properties still hinder its applications in the textile industry. In this study, a doubled-layered chitosan coating was cured on cotton fabric to serve as bio-mordant and form a protective layer on it. Under the optimal treatment conditions, the maximum qe (adsorption amount) of the natural dye sodium copper chlorophyllin (SCC) calculated from the Langmuir isothermal model was raised from 4.5 g/kg to 19.8 g/kg. The dye uptake of the treated fabric was improved from 22.7% to 96.4% at 1% o.w.f. dye concentration. By a second chitosan layer cured on the dyed fabric via the cross-linking method, the wash fastness of the cotton fabric dyed with SCC can be improved from 3 to 5 (ISO 105 C-06). The natural source of the biopolymer material, chitosan, and its ability to biodegrade at end of life met with the initial objective of green manufacturing in applying natural dyes and natural materials to the textile industry.

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Dissertations / Theses on the topic "Natural dyes"

1

Torpner, Jessie, and Elvira Boman. "Characterization of Natural Peruvian Dyes on Dye-Sensitized Solar Cells." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-326414.

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Mcclure, Kathryn Raeburn. "Development of new extraction methods for analysis of natural and synthetic organic colourants from historical and artistic matrices." Master's thesis, Universidade de Évora, 2020. http://hdl.handle.net/10174/29168.

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Abstract: In this thesis, an innovative approach for the extraction and clean-up of natural and synthetic textile dyes based on a recently developed ammonia extraction protocol and a novel Dispersive Liquid-Liquid Microextraction (DLLME) is presented. The thesis builds upon recent research highlighting the benefits of the ammonia-based extraction protocol for efficient extraction and preservation of the glycosyl moieties present in some types of natural dyes. This state-of-the-art extraction technique requires the use of a clean-up step to purify and preconcentrate the dye molecules for analysis. This clean-up step has never before been investigated or developed, and current methods rely upon traditional Liquid-Liquid Extractions (LLE), which are not well suited to the very small quantities of materials available for the analysis of artefacts of cultural heritage. The novel DLLME protocol presented by this thesis was developed in order to improve the recovery of natural dyes for analysis, and is also the first clean-up protocol to be developed for the analysis of synthetic textile dyes from cultural heritage matrices. Whilst a clean-up system has never before been applied to synthetic dyes within cultural heritage, pre-concentration and pre-treatment protocols are frequently reported for analysis of the same type of dyes used in food colourants. For this reason, this research adapts a DLLME method from the analysis of edible products, and combines this with the state-of-the-art ammonia extraction method reported in literature. DLLME protocols for both natural and synthetic dyes were developed and optimised first on known analytical standards, considered representative of the possible structures of natural dyes and synthetic azoic acid dyes respectively. The extraction recoveries of a variety of disperser and extraction solvents were analysed using HPLC coupled with targeted mass spectrometry. The optimised conditions were then coupled with the ammonia based extraction to ensure coherence of the methods. The results showed significant improvements in the recovery of natural dye analytes compared to current methods, as well as increased precision and efficiency. For synthetic dyes, results showed adequate recovery of analytes and allowed the ammonia-based extraction method to be applied successfully for the first time. After optimisation, the protocol for synthetic dyes was applied successfully to 15 samples (11 fibres, 4 powders) of suspected azo dyes from the Azienda Coloranti Nazionali e Affini (ACNA) synthetic dye collection housed at Sapienza University of Rome’s Museum of Chemistry. The novel protocol was performed after preliminary Raman screening to obtain some introductory information about the unknown samples in the collection. After application of the novel protocol, the samples were identified through untargeted analysis by HPLC-HRMS.

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Zongo, Sidiki. "Nonlinear optical properties of natural dyes based on optical resonance." Thesis, University of the Western Cape, 2012. http://hdl.handle.net/11394/4635.

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>Magister Scientiae - MSc
Recent research shows that the study of optical properties of organic material natural dyes has gained much consideration. The specific functional groups in several natural dyes remain essential for the large nonlinear absorption expressed in terms of nonlinear optical susceptibilities or other mechanism of absorption such as two photon absorption (TPA), reverse saturable absorption (RSA) or intensitydependent refractive index characteristic. In this thesis we highlight the optical limiting responses of selected natural dyes as nonlinear response in the femtosecond regime. This technique refers to the decrease of the transmittance of the material with the increased incident light intensity.Three dyes derived from beetroot, flame flower and mimosa flower dyes were investigated. The results showed a limiting behaviour around 795 mW for the beetroot and the flame dye while there is total transmission in the flame dye sample. The performance of the nonlinearity i.e. the optical limiting is related to the existence of alternating single and double bonds (i.e. C-C and C=C bonds) in the molecules that provides the material with the electron delocalization, but also it is related to the light intensity.Beside nonlinearity study, crystallographic investigation was carried out for more possible applicability of the selected dyes and this concerned only the mimosa and flame flower dye thin film samples since the beetroot thin film was very sensitive to strong irradiation (i.e. immediately destroyed when exposed to light with high intensity). For more stability,dye solutions were encapsulated in gels for further measurements.

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Drivas, Ioannis. "Chemical modification of natural dyes and their application in textiles." Thesis, University of Leeds, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.505070.

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Datsko, O. I. "Using natural dyes in ukrainian lizhnyck’s textile crafts: ecological aspect." Thesis, Вид-во СумДУ, 2006. http://essuir.sumdu.edu.ua/handle/123456789/11625.

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Abouamer, Karima Massaud. "Application of natural dyes in textile industry and the treatment of dye solutions using electrolytic techniques." Thesis, Brunel University, 2008. http://bura.brunel.ac.uk/handle/2438/5088.

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Anodic oxidation of a commercial dye, methylene blue (MB), from aqueous solutions using an electrochemical cell is reported. Data are provided on the effects of eight different types of supporting electrolytes, concentration of electrolytes, initial dye concentration, current and electrolytic time on the percentage removal of methylene blue. Anodic oxidation was found to be effective in achieving the removal of methylene blue from aqueous solutions. The optimised electrolytic conditions, for the removal of methylene blue (MB), were applied to the removal of azure A (AA), azure B (AB), azure C (AC), toluidine blue 0 (TBO), new methylene blue (NMB), dimethyl methylene blue (DMMB), thionine (TH), methylene green (MG), methyl violet (MV), Nile blue (NB), neutral red (NR), acridine orange (AO) and resorufin (RS) from aqueous solutions containing sodium chloride. Results indicated that between 84 to 100% of each dye of phenothiazine was removed during 60 minutes of electrolysis. The percentage removals for the phenothiazine dyes followed the following decreasing order: (MG ≈ MV) > (DMMB ≈ AA) > (AB ≈ AC ≈ NMB) > TBO > TH. However, the azine, acridine and oxazine dyes showed between 98 to 99% colour removal and the following decreasing order: NB ≈ NR > AO ≈ RS. Strongly electron withdrawing substituents such as nitro group or carbonyl group increases the degradation of the phenothiazine chromophore, whereas the electron donating groups such as amino and alkyl amino groups decrease the degradation. Anodic oxidation studies were extended to the destruction of eight permitted food colours, with azo and triarylmethane chromophore, from aqueous solution containing either sodium chloride or sodium sulphate as a supporting electrolyte. Again, sodium chloride was found to be the best supporting electrolyte and between 97 to 100% colour removal was achieved after 60 minutes of electrolysis. The percentage removal for the single azo based colourants followed the following increasing order: carmoisine > sunset yellow FCF > amaranth > ponceau 411 > tartrazine. However, the binary and ternary mixtures of food colour showed the following increasing order: blue > green > yellow food colours. The extractions and applications of 54 different types of natural dyes (53 from plants and one from animal origin) are evaluated using simple techniques. The extracted natural dyes were applied in dyeing three types of textile fabrics viz: a) paj silk, b) brushed cotton twill and c) crystallized shimmering satin. The effects of two eco-friendly mordants (alum and iron) on the dyeing process were compared with the dyeing process without mordants. The colour fastness to wash and light (both natural and artificial sun light) of these natural dyes were also assessed. The results showed that out of the 54 dyestuffs studied, 32 plants are potentially able to produce marketable natural dyes. These dyes produced good colour and met minimal performance standards for colour fastness to light and washing. The addition of mordants generally increased the fastness properties. Silk gave the best performance of dyeing uptake and stability. Cotton gave the poorest fastness properties. The overall results showed that, considering molecular associations, the fastness properties were of the order: anthraquinones and tannins> indigoid > flavones> flavonols > flavanols> carotenoids> anthocyanins. Anodic oxidation studies were extended to the destruction of ten natural dyes from aqueous solutions containing either sodium chloride or sodium sulphate as a supporting electrolyte. Anodic oxidation was effective in achieving the removal of green tea (35%), spinach (69%), Langdale yellow and turmeric (95%), carmine, saffron, henna (97%), beetroot, karkade and sumac (98%). However, TOC measurements and the UV analyses indicated that some organic intermediate compounds were formed in the presence of sodium chloride.

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Luo, Xujun. "Synthesis of reactive disperse dyes for dyeing natural fabrics in supercritical CO2." Thesis, University of Leeds, 2017. http://etheses.whiterose.ac.uk/18859/.

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Over the course of time, the dyeing industry has become one of the greater polluters of water worldwide. The sheer volume of water and the high concentration of additives used in textile colouration are staggering, which have already caused unrepairable damage to environment and continue to directly impact on the sustainability of textile colouration industry. “Supercritical CO2 dyeing” uses supercritical CO2 as the dyeing medium, enabling the reduction and even elimination of the creation of textile colouration wastewater. Supercritical carbon dioxide (scCO2) has a low critical point and is non-flammable. It can be recycled, providing a promising environmentally friendly substitute for aqueous media. Reactive disperse dyes that have both reactivity towards natural fabrics and high solubility in scCO2 would offer great promise for colouring natural fabrics. In this study, the isocyanate group, as a reactive group, was introduced to disperse dyes to create reactive disperse dyes suitable for supercritical dyeing. Thus, a series of reactive disperse dyes, containing both isocyanate groups and alkyl groups were successfully synthesised. Dyeing experiments under different dyeing conditions were performed to establish the optimal dyeing conditions for these synthesised dyes. A new synthesis route was developed to create an azo-based disperse reactive dye containing the vinyl sulphonyl reactive group, which was used to dye natural fibres using scCO2 as the dyeing medium. Using relatively moderate, optimal conditions in the scCO2 dyeing processes, uniform dyeing with high colour strength and fastness properties that were similar to those from conventional aqueous dyeing were achieved on natural fabrics that were dyed with the synthesised dyes. Furthermore, there are opportunities to modify a wide range of disperse dyes following this synthesis route.

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Schrader, Erica. "Comparison of aluminum mordants on colorfastness of natural dyes on cotton and bamboo fabrics." Thesis, Manhattan, Kan. : Kansas State University, 2010. http://hdl.handle.net/2097/4151.

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Forman, Gabriela Alexandra da Cunha Santos. "The importance of biotechnology in the textile industry." Doctoral thesis, Universidade de Lisboa. Faculdade de Arquitetura, 2016. http://hdl.handle.net/10400.5/12440.

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Sampaio, Samuel Gondim. "Study and Characterization of New Natural Dyes for Application in Sensitized solar cells." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=11335.

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FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico
Este trabalho apresenta um estudo e caracterizaÃÃo de corantes com flores de plantas coletadas na regiÃo Nordeste do Brasil, tais como: a Sida cordifolia (malva branca), a Catharanthus roseus (boa noite) e a Torenia fournieri (amor-perfeito-de-verÃo), Allamanda catÃrtica (alamanda da flor grande) e Cobaea scandens (sino de catedral). Foi estudado e observado a influÃncia dos flavonoides na sensibilizaÃÃo dos corantes naturais por meio de um protÃtipo de cÃlula fotovoltaica, com vidros condutores com um filme de SnO2:F produzidos por spray PirÃlise. As plantas foram submetidas a um tratamento de lavagem. Foram maceradas e imersas em um solvente extrator. ApÃs alguns dias, foram concentradas no rotaevaporador a uma velocidade 160 rpm em temperatura ambiente por 40 minutos. Este corante foi aplicado sobre uma camada de TiO2 e entÃo a cÃlula foi testada sob a luz solar. Os valores obtidos foram: Torenia fournieri, corrente de curto-circuito = 0,44 mA e tensÃo de circuito aberto = 0,16 V; Catharanthus roseus, corrente de curto-circuito = 0,43 mA e tensÃo de circuito aberto = 0,14 V; Sida cordifolia, corrente de curto-circuito = 0,22 mA e tensÃo de circuito aberto = 0,19 V; Allamanda catÃrtica, corrente de curto-circuito = 0,19 mA e tensÃo de circuito aberto = 0,12V; Cobaea scandens, corrente de curto-circuito = 0,32 mA e tensÃo de circuito aberto = 0,17V. Estes resultados podem fornecer mais dados para melhor entendimento e uso de novos corantes naturais em cÃlulas solares.
This paper presents a study and characterization of dyes with flowers of plants collected in the Northeast of Brazil, such as Sida cordifolia (malva branca), the Catharanthus roseus (boa noite), Torenia fournieri (amor-perfeito-de-verÃo), Alamanda cathartic (alamanda da flor grande) and Cobaea scandens (sino de catedral). Was studied and observed the influence of flavonoids in the sensitization of natural dyes by means of a prototype solar cell with conductive film with a glass of SnO2: F produced by spray pyrolysis. The conductive glass was obtained precursor solution (HCl/H2O) containing of tin II chloride dihydrate (SnCl2.2H2O), ammonium fluoride (NH4F) and a slide glass heated to 600 Â C. The solution was sprayed on the heated substrate. About conductive glass was deposited a layer of titanium dioxide (TiO2). The layer was obtained by dissolving in commercial TiO2 powder acetic acid (CH3CO2H) and Triton X. The electrolyte was a solution of iodine / triiodide into the intracellular regeneration cycle, the counter electrode was a layer made of graphite. The plants were treated with a by washing with deionized water, drying with heat gun and Silica Gel to absorb moisture. Were macerated and immersed in an organic solvent. After a few days, were concentrated in a rotary evaporator at a speed 160 rpm at room temperature for 40 minutes. This dye was applied on the TiO2 layer and then the cell was tested under sunlight. The values obtained were: Torenia fournieri, short-circuit current = 0.44 mA and open circuit voltage V = 0.16; Catharanthus roseus, short-circuit current = 0.43 mA = 0 and open-circuit voltage, 14 V, Sida cordifolia, short-circuit current = 0.22 mA and open circuit voltage V = 0.19; Allamanda cathartic, short-circuit current = 0.19 mA and open circuit voltage V = 0.12; Cobaea scandens, short-circuit current = 0.32 mA and open circuit voltage = 0.17 V. These results may provide more data for better understanding and use of new natural dyes in solar cells.

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Books on the topic "Natural dyes"

1

Natural dyes. London: British Museum, 2002.

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Malla, Laxmi. The natural dyes of Nepal. Kirtipur, Nepal: Research Centre for Applied Science & Technology, Tribhuvan University, 1993.

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Natural dyeing without chemicals. 2nd ed. Shefford: J. Dean, 1996.

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Kim, Yun-gyŏng. Traditional natural dyeing. Seoul: Korea Craft & Design Foundation, 2012.

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Dalby, Gill. Natural dyes for vegetable fibres. Alcombe: Ashill, 1992.

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Dalby, Gill. Natural dyes, fast or fugitive. Strathmiglo: Haldanes Craft & Tools, 1999.

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Natural dyes, fast or fugitive. (Dulverton): (Ashill), 1985.

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Knutson, Linda. Synthetic dyes for natural fibers. Loveland, Colo: Interweave Press, 1986.

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Bechtold, Thomas. Handbook of natural colorants. Hoboken, NJ: Wiley, 2009.

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Kyeryang ch'ŏnyŏn yŏmsaek: Measuring natural dyeing. Kyŏngbuk Kumi-si: Sŭp'ekt'ŭrŏm, 2010.

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Book chapters on the topic "Natural dyes"

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Maaza, M. "Natural Dyes for Photonics Applications." In Novel Plant Bioresources, 479–93. Chichester, UK: John Wiley & Sons, Ltd, 2014. http://dx.doi.org/10.1002/9781118460566.ch35.

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Merdan, Nigar, Seyda Eyupoglu, and Mujgan Nayci Duman. "Ecological and Sustainable Natural Dyes." In Textile Science and Clothing Technology, 1–41. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2185-5_1.

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Kasiri, Masoud B., and Siyamak Safapour. "Natural Dyes and Antimicrobials for Textiles." In Environmental Chemistry for a Sustainable World, 229–86. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6836-9_6.

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Deakin, Jeffrey John. "Natural Plant Dyes of Oriental Carpets." In Natural Products of Silk Road Plants, 211–17. First edition. | Boca Raton : CRC Press, [2021] |: CRC Press, 2020. http://dx.doi.org/10.1201/9780429061547-13.

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Adeel, Shahid, Sana Rafi, Mahwish Salman, Fazal-Ur-Rehman, and Shazia Abrar. "Potential Resurgence of Natural Dyes in Applied Fields." In Plant-Based Natural Products, 1–25. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119423898.ch1.

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Yusuf, Mohd, Shahid-ul-Islam, and Shahid-ul-Islam. "Natural Dyes from Indigoid-Rich Plants: An Overview." In Plant-Based Natural Products, 27–46. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119423898.ch2.

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Yıldırım, Fatma Filiz, Arzu Yavas, and Ozan Avinc. "Printing with Sustainable Natural Dyes and Pigments." In Sustainable Textiles: Production, Processing, Manufacturing & Chemistry, 1–35. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-38545-3_1.

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Adeel, Shahid, Sana Rafi, Muhammad Abdul Mustaan, Mahwish Salman, and Abdul Ghaffar. "Animal Based Natural Dyes: A Short Review." In Handbook of Renewable Materials for Coloration and Finishing, 41–74. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119407850.ch4.

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Mansour, Rym. "Natural Dyes and Pigments: Extraction and Applications." In Handbook of Renewable Materials for Coloration and Finishing, 75–102. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119407850.ch5.

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Adeel, Shahid, Shazia Abrar, Shumaila Kiran, Tahir Farooq, Tahsin Gulzar, and Mubeen Jamal. "Sustainable Application of Natural Dyes in Cosmetic Industry." In Handbook of Renewable Materials for Coloration and Finishing, 189–211. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119407850.ch10.

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Conference papers on the topic "Natural dyes"

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Ranthunga, R. G. S. M., K. V. Wanigasekara, and S. V. Udayakumara. "Dyeing of Cotton Fabric with a Natural Dye Extracted from Areca Concinna Peel." In ERU Symposium 2021. Engineering Research Unit (ERU), University of Moratuwa, 2021. http://dx.doi.org/10.31705/eru.2021.2.

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In modern world, most of the countries tend to use the eco-friendly concept in many industries to minimize environmental pollution [1]. Synthetic dyes that are used in the textile industry offer more unfavourable and harmful effect to human beings such as carcinogenic, health-hazardous like skin allergies, toxic etc. And also, there is no systematic way to dispose of synthetic waste in the environment. So that it can be harmful to the ecosystem [2]. Therefore, the world tends to use natural dyes instead of synthetic dyes. Natural dyes have many advantages than synthetic dyes such as non-carcinogenic, eco-friendly, non-allergic, non-hazardous to human beings, etc. Natural dyes are mainly extracted from three different sources such as minerals, plants, and insects. Among these, plants are the most abundantly used natural dye source to extract dyes [3]. The main objective of this study was to extract natural dye from areca concinna peels and use extracted dye to dyeing the cotton fabrics.

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Santos, Gabriela, and Cristina Carvalho. "Ergonomic Fashion Design: Sustainable Dyes." In Applied Human Factors and Ergonomics Conference. AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1001318.

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Water waste, contamination, and fossil fuel generated energy are acknowledged issues within the textile industry. Current dyeing processes pose serious threat to the environment and human health, often associated with toxic and carcinogenic substances that are released into the environment, through effluents not conveniently treated before being discharged into natural waters. Besides print and pattern, consumers demand for basic characteristics in textiles – these must resist to agents that cause colours to fade. On the other hand, industry must provide a great range of colours and access to huge quantities of coloured substance to dye. Simultaneously, it must be cost-effective. Natural dyes are perceived as less harmful for the environment due to its biodegradable nature. Studies reveal certain natural dyes possess UVR protection properties, as well as antimicrobial and anti-inflammatory assets. Nevertheless, depending on the nature of the dye, there are many advantages and disadvantages to consider.Through an extensive study on various fields such as Biotechnology, History, Ethnography, Biology, Archaeology, amongst many others we gathered information regarding natural coloured compounds, colour sources (plants, animals and microorganisms), ancient and modern techniques of extraction and application. This study shows the evolution of dyes throughout the centuries. It also reveals that the revival of natural dyes in addiction to new cutting edge technologies such as biotechnology might allow for an industrial feasibility.

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Zakharova, A. V., and N. A. Tikhomirova. "NATURAL DYES: HISTORY AND MODER." In Месмахеровские чтения - 2022. Санкт-Петербург: Федеральное государственное бюджетное образовательное учреждение высшего образования «Санкт-Петербургская государственная художественно-промышленная академия имени А.Л. Штиглица», 2022. http://dx.doi.org/10.54874/9785604789377_122.

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Mazhar, Maheen, Hafiza Mazia Ada, Humair Ahmed Siddiqui, and Sadia Muniza Faraz. "Fabrication of Dye Sensitized Solar Cells using natural dyes." In 2016 19th International Multi-Topic Conference (INMIC). IEEE, 2016. http://dx.doi.org/10.1109/inmic.2016.7840148.

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Huizhi Zhou, Liqiong Wu, Qingqing Miao, Gang Xin, and Tingli Ma. "Dye-sensitized solar cell using natural dyes as sensitizers." In 2010 IEEE 3rd International Nanoelectronics Conference (INEC). IEEE, 2010. http://dx.doi.org/10.1109/inec.2010.5424470.

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Yin, Junyi. "The application of natural dyes in Dye-sensitized solar cells." In 2016 6th International Conference on Machinery, Materials, Environment, Biotechnology and Computer. Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/mmebc-16.2016.265.

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Hijji, Yousef, Hala Sultan Al Easa, and Mahmoud AbdelRasoul. "Natural Dyes in Cyanide and Anion Sensing." In Qatar Foundation Annual Research Conference Proceedings. Hamad bin Khalifa University Press (HBKU Press), 2016. http://dx.doi.org/10.5339/qfarc.2016.eepp2423.

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Abdul Hapiz, Irmawati Akma, Jemima Japakumar, Jivinthiran Jayagobi, Mohamad Azfar Jamaluddin, and Sharmila Arumugam. "Production of Lip Balm from Natural Dyes." In 3rd International Conference of Computer, Environment, Agriculture, Social Science, Health Science, Engineering and Technology. SCITEPRESS - Science and Technology Publications, 2018. http://dx.doi.org/10.5220/0010040502020206.

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Musikapan, Ravitep, Patararin Pongprasit, and Natcha Sirikhvunchai. "Development of Mot-Mom Fabric Patterns Using Born-out Printing and Embroidery Technologies into Fashion Accessories of Kwanyo Brand." In SPACE International Conferences April 2021. SPACE Studies Publications, 2022. http://dx.doi.org/10.51596/cbp2021.wvyy7826.

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Abstract The objectives of this study were to develop Mor-Hom fabric patterns using burn-out printing technology in a variety of contemporary shades and contemporary embroidery patternsfrom machine embroidery and hand embroidery techniques to develop into international fashionaccessories Kwanyo brand. In addition, this study also aimed at using the fabric burn-out printingtechnique to create beautiful patterns instead of the stamping method. The machine embroideryand hand embroidery techniques were also used to increase the product value to enhance self-suffi ciency and generate income for local communities.According to the results, in developing Mor-Hom fabric patterns using burn-out printing andembroidery technologies into fashion accessories of the Kwanyo brand, 100% natural dyes were usedin dyeing hand-woven cotton. A creamy mixture of potassium permanganate mixed with Konjac wasused for burn-out printing instead of screen-printing dyes. The burn-out printing was performed bywashing fabric in sulfur water or lye water to create patterns with gradient shades depending onthe dye ratio and washing method. The dyed fabric was further developed into fashion accessoriesunder the concept of local fabric products with unique patterns inspired by the surroundings. Inthis study, a collection of men’s bags was developed with suitable designs using Mor-Hom fabricpatterns inspired by Himmapan forest and natural dyed leather. Keywords: Mor-Hom fabric, burn-out printing, fashion accessories

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Aboulouard, Abdelkhalk, Sara Rbihi, Youssef Najih, Mustapha Adar, Ahmed Jouaiti, Benachir Elhadadi, and Mohammed Anas El Abbassi. "Numerical simulation of dye-sensitized solar cells performance for local natural dyes." In 2020 IEEE 6th International Conference on Optimization and Applications (ICOA). IEEE, 2020. http://dx.doi.org/10.1109/icoa49421.2020.9094508.

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Reports on the topic "Natural dyes"

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Chauhan, Rahul. Development of dye-sensitized solar cells using algal-based natural dyes for climate change mitigation. Peeref, December 2022. http://dx.doi.org/10.54985/peeref.2212p1968754.

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Ahn, Cheunsoon, Longchun Li, Xia Zeng, and S. Kay Obendorf. Analysis of the Degradation of Dye in the Silk Dyed with Natural Dye-Mordant Combination. Ames: Iowa State University, Digital Repository, November 2016. http://dx.doi.org/10.31274/itaa_proceedings-180814-1723.

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Barker, Lauren, Paulina Wietocha, Evelyn Ekstrom, Ashya Winters, and Ui-Jeen Yu. Colorfastness of Naturally-Dyed Fabrics Using Contact Dyeing Method. Ames: Iowa State University, Digital Repository, 2017. http://dx.doi.org/10.31274/itaa_proceedings-180814-1906.

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Haggart, J. W., L. T. Dafoe, K. M. Bell, G L Williams, E. T. Burden, L. D. Currie, R. A. Fensome, and A. R. Sweet. Historical development of a litho- and biostratigraphic framework for onshore Cretaceous-Paleocene deposits along western Baffin Bay. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/321828.

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Cretaceous-Paleogene strata along the eastern coast of Baffin Island, on Bylot Island, and on associated islands north of Cape Dyer, have been known since the early days of exploration of Baffin Bay in the mid-nineteenth century. Studies of these strata in the 1970s-1990s established their clastic nature and revealed details of their stratigraphy, ages, and depositional settings. Onshore strata in the Cape Dyer area accumulated in close association with volcanic deposits related to late-stage rifting in the Late Cretaceous to Early Paleocene that eventually formed Baffin Bay. In contrast, deposits in more northerly areas, such as the Eclipse and North Bylot troughs on Bylot Island, exhibit similar clastic rocks, but lack conspicuous volcanic strata, and have been associated with either the Sverdrup Basin or the Baffin Bay rift. The litho- and biostratigraphy of these deposits are summarized and discussed in terms of differing and contrasting stratigraphic interpretations, age assignments, and depositional environments.

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Patwary, Sarif Ullah, and Sherry Haar. Investigation of Sumac (Rhus Glabra L.) Leaves as a Natural Mordant on the Colorfastness of Laundering for Weld-dyed Cotton Batiste. Ames: Iowa State University, Digital Repository, November 2016. http://dx.doi.org/10.31274/itaa_proceedings-180814-1574.

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Russo, David, and William A. Jury. Characterization of Preferential Flow in Spatially Variable Unsaturated Field Soils. United States Department of Agriculture, October 2001. http://dx.doi.org/10.32747/2001.7580681.bard.

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Preferential flow appears to be the rule rather than the exception in field soils and should be considered in the quantitative description of solute transport in the unsaturated zone of heterogeneous formations on the field scale. This study focused on both experimental monitoring and computer simulations to identify important features of preferential flow in the natural environment. The specific objectives of this research were: (1) To conduct dye tracing and multiple tracer experiments on undisturbed field plots to reveal information about the flow velocity, spatial prevalence, and time evolution of a preferential flow event; (2) To conduct numerical experiments to determine (i) whether preferential flow observations are consistent with the Richards flow equation; and (ii) whether volume averaging over a domain experiencing preferential flow is possible; (3) To develop a stochastic or a transfer function model that incorporates preferential flow. Regarding our field work, we succeeded to develop a new method for detecting flow patterns faithfully representing the movement of water flow paths in structured and non-structured soils. The method which is based on application of ammonium carbonate was tested in a laboratory study. Its use to detect preferential flow was also illustrated in a field experiment. It was shown that ammonium carbonate is a more conservative tracer of the water front than the popular Brilliant Blue. In our detailed field experiments we also succeeded to document the occurrence of preferential flow during soil water redistribution following the cessation of precipitation in several structureless field soils. Symptoms of the unstable flow observed included vertical fingers 20 - 60 cm wide, isolated patches, and highly concentrated areas of the tracers in the transmission zone. Soil moisture and tracer measurements revealed that the redistribution flow became fingered following a reversal of matric potential gradient within the wetted area. Regarding our simulation work, we succeeded to develop, implement and test a finite- difference, numerical scheme for solving the equations governing flow and transport in three-dimensional, heterogeneous, bimodal, flow domains with highly contrasting soil materials. Results of our simulations demonstrated that under steady-state flow conditions, the embedded clay lenses (with very low conductivity) in bimodal formations may induce preferential flow, and, consequently, may enhance considerably both the solute spreading and the skewing of the solute breakthrough curves. On the other hand, under transient flow conditions associated with substantial redistribution periods with diminishing water saturation, the effect of the embedded clay lenses on the flow and the transport might diminish substantially. Regarding our stochastic modeling effort, we succeeded to develop a theoretical framework for flow and transport in bimodal, heterogeneous, unsaturated formations, based on a stochastic continuum presentation of the flow and a general Lagrangian description of the transport. Results of our analysis show that, generally, a bimodal distribution of the formation properties, characterized by a relatively complex spatial correlation structure, contributes to the variability in water velocity and, consequently, may considerably enhance solute spreading. This applies especially in formations in which: (i) the correlation length scales and the variances of the soil properties associated with the embedded soil are much larger than those of the background soil; (ii) the contrast between mean properties of the two subdomains is large; (iii) mean water saturation is relatively small; and (iv) the volume fraction of the flow domain occupied by the embedded soil is relatively large.

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