To see the other types of publications on this topic, follow the link: Natural dyes.
Journal articles on the topic 'Natural dyes'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Natural dyes.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
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.
Full textAbstract:
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.
2
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.
Full textAbstract:
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
3
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.
Full textAbstract:
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.
4
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.
Full textAbstract:
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
5
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.
Full textAbstract:
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.
6
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.
Full textAbstract:
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.
7
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.
Full textAbstract:
<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>
8
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.
Full textAbstract:
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.
9
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.
Full textAbstract:
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.
10
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.
Full textAbstract:
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.
11
J. Jalil, A., S. Mahmood, A. H. Abdul Rashid, S. H. Nasir, S. A. Ibrahim, and M. R. Ahmad. "Extraction of Eco-Friendly Natural Dyes from Pina Leaves and their Application on Wool Fabrics." International Journal of Engineering & Technology 7, no. 4.14 (December 24, 2019): 382. http://dx.doi.org/10.14419/ijet.v7i4.14.27689.
Full textAbstract:
Natural dyes comprise of colorants that are obtained from animals or vegetable matters without any chemical processing. Natural dyes can substitute synthetic dye and promotes green technology initiatives in the field of textile dyeing. This study was carried out by extracting dyes from pineapple leaves (Ananas Comosus) using three stage mordanting methods using different mordants namely pre-mordanting, post-mordanting and simultaneous dyeing-mordanting. The mordants used were aluminium potassium sulphate, white vinegar and sodium chloride (NaCl). Wool fabrics were used for dyeing. The strength of colour and K/S values of the dyed fabrics were measured before and after washing. The colourfastness to washing, rubbing and light fastness of the fabrics were conducted to investigate the performance of the dye and mordants. The results indicate that the washing, rubbing and light fastness properties of dyed samples were between good to excellent grades.
12
Shams Nateri, A., E. Dehnavi, A. Hajipour, and E. Ekrami. "Dyeing of polyamide fibre with cochineal natural dye." Pigment & Resin Technology 45, no. 4 (July 4, 2016): 252–58. http://dx.doi.org/10.1108/prt-05-2015-0043.
Full textAbstract:
Purpose The aim of the paper was to study the effects of mordanting methods on the absorption behaviour of cochineal natural dye on polyamide fibres. Design/methodology/approach Iron sulphate and aluminium potassium sulphate salts were used as mordanting agents, and bottom mordanting, meta-mordanting and after mordanting methods were applied in the dyeing of polyamide samples with the cochineal natural dye. Colourimetric evaluations were carried out, and the principal component analysis was used to investigate the spectrophotometric properties of the dyed samples. Fastness properties of the dyed samples were also assessed. Findings The obtained results indicate that the method of mordanting has a great effect on the obtained shades, absorption behaviour and fastness properties. Based on the results, it was concluded that polyamide fabrics could be successfully dyed with cochineal and combination of dyeing with different mordanting methods, and different mordanting agents would develop the range of obtainable shades. Originality/value The textile and apparel industries have been widely criticised for their role in polluting the environment. So, the use of synthetic dyes has been limited and the use of natural dyes has increased. The literature survey indicates that there have been relatively few works investigating the dyeing of polyamide with cochineal natural dye. This research studies the effects of mordanting methods and mordant types on colourimetric and fastness properties of cochineal-dyed polyamide samples.
13
Wu, Ji Hong, and Jun Ke. "Dyeability of PLA Fabric with Natural Dye Emodin." Advanced Materials Research 183-185 (January 2011): 2000–2004. http://dx.doi.org/10.4028/www.scientific.net/amr.183-185.2000.
Full textAbstract:
The dyeability of PLA fabric with the natural emodin dye has been investigated. The effect of different factors, which are dyeing temperature, dyeing time, dye bath pH value, bath ratio, dye concentration and mordants, has been studied. The color of each dyed sample was evaluated in terms of the K/S value, and the color fastness to soaping and crocking were tested according to the ISO standards. The results showed that the dyed fabrics have a bright color and an excellent color fastness. As a result, emodin dyes PLA is a good approach to develop “green clothes” and has broad prospect.
14
Gaffer, Hatem, Hamada Mashaly, Shaymaa Hassan Abdel-Rhman, and Mamdouh Hammouda. "Synthesis of novel dyes based on curcumin for the creation of antibacterial silk fabrics." Pigment & Resin Technology 46, no. 6 (November 6, 2017): 478–84. http://dx.doi.org/10.1108/prt-11-2016-0112.
Full textAbstract:
Purpose The study reported in this paper aims to synthesize some new curcumin containing sulphadiazine and sulphathiazole dyestuffs and study their application in dyeing silk fabrics rendering the dyed fabric antibacterial. Design/methodology/approach Simultaneous dyeing and antibacterial finishing for silk fabric using a new antibacterial acid dye having a modified chemical structure to curcumin were conducted. This modification of curcumin dye was carried out by introducing sulphonamide containing heterocyclic rings sulphadiazine and sulfathiazole through coupling with curcumin. All newly synthesized dyes were characterized by elemental analyses and spectral data (IR, 1H-NMR and MS). The dyeing characteristics of these dyestuffs were evaluated at optimum conditions. Antibacterial activities of the dyed samples at different concentrations of both dyes were studied against gram-positive (Staphylococcus aureus) and gram-negative (Salmonella typhimurium) bacteria. Findings The synthesized curcumin-containing sulphonamide dyes were applied on silk fabrics. The modified dyes exhibited good fastness properties compared to curcumin dye at optimum conditions. It was found that synthesized dyes exhibit good fastness and antibacterial properties efficient against gram-positive and gram-negative bacteria. The dyed silk fabrics showed higher antibacterial efficacy after many times of washing. Originality/value Curcumin, a common natural dye used for fabric and food colouration, was used as an antimicrobial finish due to its bactericidal properties on dyed textiles. A common dyeing process could provide textiles with colour as well as antimicrobial properties. Novel antibacterial dyestuff containing curcumin moieties with sulphonamide coupler components were shown to be an interesting natural colorant for silk with high antimicrobial ability of the dyed silk fabrics. This work has afforded a new acid dye that can be used in medical textile.
15
Kuo, Chin-Ya, and Hsiao-Han Liu. "Natural Nanoporous Filter Material as a New High-Efficiency Natural Adsorbent to Remove Textile Dyes." Proceedings of Engineering and Technology Innovation 15 (April 27, 2020): 16–23. http://dx.doi.org/10.46604/peti.2020.4668.
Full textAbstract:
The objective of this paper is to perform the innovation design of removing most textile dyes that are harmful to the environment and might induce cancer. However, many methodologies had been developed for various chemical and physical processes to remove different dyes, such as ozone oxidation, electrochemical methods, chemical coagulation, hypochlorite oxidation, and adsorption to remove dyes from wastewater. A novel nanoporous filter methodology and mathematic simulations for adsorption were established as an effective medium for removing dyes from wastewater which was compared to other expensive treatments. The different concentrations of the dye liquid are used as a tester, and the different concentrations of nanoporous adsorbent were added in a uniform distribution and were tested with different time courses and under different temperatures. The final readings were measured by a spectrophotometer and fit into a mathematic model. The result indicates that this nanoporous and natural adsorbents are very good at cleaning the dyes in this system. The fit-in mathematic models could be applied in these tests which can be used in the industrial conditions for a low cost without secondary dye pollutions.
16
Zhou, Lan, Jian Zhong Shao, and Li Qin Chai. "Study on the UV-Protective Performance of Cotton Fabrics Dyed with Natural Dyes." Advanced Materials Research 332-334 (September 2011): 1408–13. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.1408.
Full textAbstract:
In this study, the ultraviolet protective properties of the cotton fabrics dyed with natural dyes were investigated. It was observed that cotton fabrics dyed with natural dyes could absorb about 80% of the ultraviolet rays. It was demonstrated that the UV-protective effects were strongly dependent on the absorption characteristics of natural dyes for UV radiation.
17
Cao, Zhen Yu, Feng Zhao, and Xi Yan Li. "Applications of Dyes in Material Science Research." Materials Science Forum 575-578 (April 2008): 1451–54. http://dx.doi.org/10.4028/www.scientific.net/msf.575-578.1451.
Full textAbstract:
Dyes are colored organic compounds that are used to pigment fiber or other materials. Dyes are mainly calssified into natural and synthetic dyes in terms of the origin. Natural dyes include animal dyes, plant dyes and mineral dyes with such defects as incomplete chromatogram, inconvenient use and color fading, and thus have been gradually eliminated. In 1856, the 18-year-old young British scientist Perkin successfully invented the world's first synthetic dyes. He built his own factory and industrialized synthetic dye production. Over 100 years since then, dye industry has undergone rapid development, and by 2001 synthetic dyes already have been up to nearly 10,000 varieties. In 2004, the output of total dyes in the world has reached 900,000 tons. Synthetic dyes are used comprehensively, not only to dye synthetic fibers, but also natural fibesr, fur, leather and man-made fibers.
18
VUTHIGANOND, Nattaya, Pisutsaran CHITICHOTPANYA, Monthon NAKPATHOM, and Rattanaphol MONGKHOLRATTANASIT. "Ecological dyeing of acrylic yarn with colorant derived from natural lac dye." Journal of Metals, Materials and Minerals 32, no. 4 (December 26, 2022): 71–78. http://dx.doi.org/10.55713/jmmm.v32i4.1529.
Full textAbstract:
In recent years, the application of natural dyes in textile coloration has attracted significant study interest. In this current study, the bio-based dyeing of synthetic textile fiber, specifically acrylic yarn, with natural lac dye was investigated. The yarn was dyed using a meta-mordanting technique. The dyeing parameters, including temperature, time, pH of the dye bath, dye concentration, mordant type, and mordant concentration, were examined. Two eco-mordants, aluminium sulfate and ferrous sulfate, are compared against an eco-restricted copper sulfate in terms of color strength and fastness. The results demonstrated that the meta-mordanting technique can be used to dye acrylic fiber using natural lac dye. The optimum dyeing results were achieved using an acidic pH (2-3) and a temperature of 100℃ for 40 min of dyeing time. The color strength of the dyed samples was enhanced by the application of mordants. Color uniformity was achieved by controlling the temperature gradient in the Tg region. In terms of color change, the wash fastness properties of the dyed samples were found to be poor to moderate due to the dye's susceptibility to alkaline washing. In terms of color fastness to rubbing and light, ferrous sulfate and copper sulfate produced superior results.
19
Jinchu, I., C. O. Sreekala, and K. S. Sreelatha. "Dye Sensitized Solar Cell Using Natural Dyes as Chromophores - Review." Materials Science Forum 771 (October 2013): 39–51. http://dx.doi.org/10.4028/www.scientific.net/msf.771.39.
Full textAbstract:
The molecular dye is an essential component of the Dye sensitized solar cell (DSSC), and improvements in efficiency over the last 15 years have been achieved by tailoring the optoelectronic properties of the dye. The most successful dyes are based on ruthenium bipyridyl compounds, which are characterized by a large absorption coefficient in the visible part of the solar spectrum, good adsorption properties, excellent stability, and efficient electron injection. However, ruthenium-based compounds are relatively expensive, and organic dyes with similar characteristics and even higher absorption coefficients have recently been reported; solar cells with efficiencies of up to 9% have been reported. Organic dyes with a higher absorption coefficient could translate into thinner nanostructured metal oxide films, which would be advantageous for charge transport both in the metal oxide and in the permeating phase, allowing for the use of higher viscosity materials such as ionic liquids, solid electrolytes or hole conductors. Organic dyes used in the DSSC often bear a resemblance to dyes found in plants, fruits, and other natural products, and several dye-sensitized solar cells with natural dyes have been reported. This paper gives an over-view of the recent works in DSSC using the natural dyes as chromophores.
20
Bhandari, Netra Lal, Basant Pokhrel, Upashana Bhandari, Sulakshana Bhattarai, Anil Devkota, and Ganesh Bhandari. "An overview of research on plant based natural dyes in Nepal: scope and challenges." Journal of Agriculture and Natural Resources 3, no. 2 (October 30, 2020): 45–66. http://dx.doi.org/10.3126/janr.v3i2.32328.
Full textAbstract:
The worldwide demand of natural dyes is of great interest due to the increased public awareness about the atmospheric and environmental pollution caused by the commercially available synthetic dyes. Nepal being wealthy in flora, would be fine research laboratory land for the plant based natural dyes. Among most of the natural dyes, plant-based dyes/pigments have wide range of applications in fabric, food, drug coloring, therapeutic values and also in solar cells in presence of different mordants. The use of mordant is inevitable during natural dyeing process in order to improve the fastness properties on fabrics, foods and drugs by forming a co-ordination complex with dye. In this article, a short overview of plant based natural dyes extraction applications and their scope and limitations will be discussed with special reference to Nepal. In the present review, the green methods of dye extraction, and dyeing technologies will be discussed, and the research fields based on natural dyes will be explored. Some of the natural dyes has also shown the antimicrobial, antioxidant, antifungal properties and hence are also discussed with biomedical applications.
21
Smelcerovic, Miodrag, Dragan Djordjevic, and Mile Novakovic. "Textile dyeing by dyestuffs of natural origin." Chemical Industry 60, no. 5-6 (2006): 120–28. http://dx.doi.org/10.2298/hemind0606120s.
Full textAbstract:
The textile industry is one of the biggest industrial consumers of water especially dye houses which utilize synthetic dyes and other chemicals. Natural dyes are generally environmental friendly and have many advantages over synthetic dyes with respect to production and application. In recent years, there has been an interest in the application of these dyes due to their bio-degradability and higher compatibility with the environment. A review of previous work in the field of applying dyestuffs of natural source as possible textile dyes is given. From an ecological viewpoint, the substitution of chemical dyes by 'natural products' in textile dyeing may be feasible and may represent not only a strategy to reduce risks and pollutants, but also an opportunity for new markets and new businesses which can develop from the inclusion of ecology in trade policy.
22
Younas, Touseef, Noor Tayyaba, Afsheen Ayub, and Shaukat Ali. "Textile fabric's and dyes." Tekstilna industrija 69, no. 3 (2021): 47–59. http://dx.doi.org/10.5937/tekstind2103047y.
Full textAbstract:
Textiles sectors serve up the outfit needs of every day and this industry plays a major role in the economy of the country. All the textile fabrics are either natural or synthetic fibers or a blend of both. Different types of dyes are used for different kinds of fabrics depending on the nature and type of the fabric to be dyed, to impart color, modify the fabric to make them more attractive and astonishing. In short, the introduction of synthetic dyes resulted in the demise of a massive natural dye industry. So, it's necessary to classify the different types of dyes with the increase in the number of types and varying dyeing properties so that this would be a best way to understand the different types of dyes, their applicability, fastness and other properties. In this article, a source for the beginners is provided to understand different kind of the textile fabrics and their importance as well as their drawbacks, dyes and their various types, their interaction with the corresponding fabric, their color strength and color fastness properties.
23
Martín, S. A., L. Valdés, F. Mérida, L. C. de Ménorval, M. Velázquez, and A. Rivera. "Natural clay from Cuba for environmental remediation." Clay Minerals 53, no. 2 (June 2018): 193–201. http://dx.doi.org/10.1180/clm.2018.13.
Full textAbstract:
ABSTRACTThe use of natural clays for the removal of dyes from wastewater, an important part of environmental remediation, is desirable due, not least, to their low cost. Palygorskite (PAL), a rigid-structure clay, is a good candidate for use in the elimination of industrial effluents, based on its exceptional adsorptive properties. Recently, a new palygorskite deposit has been discovered in Cuba and its use in the adsorption of dyes has not yet been explored in detail. In the present study, the use of unmodified natural Cuban palygorskite as a host for dyes was evaluated. Congo red (CR) and methylene blue (MB) were the anionic and cationic dyes tested, respectively, because of their wide use and toxicity to the environment. Several physical-chemical parameters were studied in order to establish the best experimental conditions under which to achieve the greatest dye load per gram of clay. Natural mixtures with different percentages of montmorillonite were also tested to evaluate their effect on the adsorption of the dyes. The results indicated that at pH values of ~7–9 and an initial dye concentration of 0.1 mg mL–1, the process was efficient. X-ray diffraction (XRD) analysis proved the surface adsorption of both dyes on the clays. The main interactions involved in the clay-dye system were electrostatic forces and H-bonds. Adsorption of CR seemed to be controlled fundamentally by the palygorskite phase. Such results support the use of this natural clay as an efficient host for the removal of MB and CR from wastewater.
24
Samarawickrama, Rumesh, U. G. S. Wijayapala, N. D. Wanasekara, and C. A. N. Fernando. "Improving Dyeing Properties of Cotton Fabrics to Natural Dyes with Cellulose Nanocrystals (CNCs) [Mejora de las propiedades de teñido de telas de algodón a tintes naturales con nanocristales de celulosa (CNC)]." Journal of Nanotechnology 5, no. 1 (October 19, 2021): 1–8. http://dx.doi.org/10.32829/nanoj.v5i1.141.
Full textAbstract:
Natural dyes can make less environmental problems associated with manufactured colouring agents and textile dyeing. But, the natural dyes fixing process was used chemicals called mordant. The most of times mordants were used metallic salts and metal salts mordants were not environmentally friendly. Therefore, remove the disadvantage associated with natural colorants and the use of nanoparticles. In this research, cotton fabric was treated with the nanoparticle of cellulose nanocrystals (CNCs) as mordant. The cellulose nanocrystals extraction process was done by using Whatman filter paper. The cellulose nanocrystals obtained will be further analyzed and characterized by using selected tools such as Particle size analysis and Fourier-transform infrared (FTIR) spectroscopy. The cotton fabrics mordanting processes were done by two types of pre-mordanting and post-mordanting methods. The three natural ingredients of Mangifera indica (Mango) leaves, Tectona grandis (Teak) leaves and Lannea coromandelica (Indian ash tree) leaves were used to extract the natural dyes using with aqueous extraction method. The extracts from dyeing processes were carried out after and before mordanting processes. The dyed sample from colour fastness to light, washing, and crocking were assessed according to standard methods. The cellulose nanocrystals gave very good colour fastness to light, wash, and rubbing when dyed with all three dye extractions. In the present study, innovative mordant of cellulose nanocrystals and natural dyeing with three natural dye extractions have been shown to give good dyeing results with cotton fabric.
25
Zakar, Aseel M. A., and Salah A. Naman. "Evaluation and Comparison of The Current-Voltage (I-V) Performance for Both Silicon Solar Cells and Dye Sensitized Solar Cell (DSSC) Covered with Natural Plant Dyes." Science Journal of University of Zakho 9, no. 2 (June 30, 2021): 112–22. http://dx.doi.org/10.25271/sjuoz.2021.9.2.794.
Full textAbstract:
A new concept based on introducing natural dye-sensitized molecules on the surface of Silicon Si solar cell namely “dyed Si solar cell” is introduced. This dye/Si interface is thought to be effectively enhanced efficiency. The IV readings are compared among (a) blank and covered Si solar cells, (b) DSSC using the same sensitized molecules. The results were recorded with different physical parameters like UV-visible Spectrum dyes, light intensity, cell area, and different fabrication Also, cell stability has been recorded. These results serve simply to give some of the cutting-edge of dyed Si solar cell with a huge improvement in its efficiency up to 121% with pot marigold flower dye (CC) dye at its optimum case and 16.53% in arthropodafotos-de- flower dye (ZZ) dye at its lowest case. While in DSSC, the efficiencies associated with the same natural dyes were very limited, rather sometimes they get lower. The results have been compared with similar group studies. Our new concept may be used as a highly promising technology for the dyed Si solar cell to give higher efficiency compare with its blank Si solar cell due to the suitability of dyes with silicon semiconductor, we suggest a figure for the new cell which is an ambiguous mechanism of cooperation between excited molecule with the promoted electron of silicon semiconductor, Si.
26
Sośnicka, Marta, Agnieszka Nowak, Agata Czyżowska, Ilona Gałązka-Czarnecka, and Aleksandra Czerbniak. "Polyphenolic Herbal Extract of Cistus incanus as Natural Preservatives for Sausages Enriched with Natural Colors." Processes 9, no. 9 (August 31, 2021): 1556. http://dx.doi.org/10.3390/pr9091556.
Full textAbstract:
This study evaluates the effects of polyphenolic extract of Cistus incanus, lycopene dye from tomatoes, and betanin dye from red beet on selected parameters of model meat products with reduced nitrate contents. The polyphenolic composition and activity of the C. incanus extract was analyzed, revealing the presence of elagotannins, flavanols, and glycosylated flavanols. We studied the effects of the extract and dyes as well as of mixtures of the extract and dyes on the growth of bacteria characteristic of the meat environment: E. coli, S. enterica, P. fragi, L. monocytogenes, B. thermosphacta, and L. sakei. We studied the effects of the extract and dyes on the lipid oxidation, color, and microbiological quality of pork sausages with reduced nitrate content over 28 days of storage. During storage, the amounts of malon dialdehyde reduced, which indicates that the extract and dyes exhibited antioxidant activity and slowed lipid oxidation in the sausages. An increase in red color was also observed in the sausages with natural additives, despite their decreased nitrate content. It was found that the C. incanus extract combined with coloring agents positively influenced the selected parameters of the analyzed pork sausages.
27
Verma, Himani, Anita Rani, Manisha Gahlot, Alka Goel, and Anil Kumar Sharma. "Sustainable dyeing of wool fabric with Talaromyces purpurogenus." Journal of Applied and Natural Science 11, no. 4 (December 10, 2019): 796–801. http://dx.doi.org/10.31018/jans.v11i4.2179.
Full textAbstract:
Natural dyes had been used by human being since ancient times for colouring of various materials including textiles. These were replaced completely by synthetic dyes, continuous use of which created the problem of pollution and environmental degradation. With the development of green technology and increased awareness of sustainability, the use of non-allergic, non-toxic and eco-friendly natural dyes on textiles has become a matter of significant importance. Among the natural sources of colourants, microorganisms such as bacteria and fungi have gained interest in the field of textile coloration. In the present study, the pigment solution yielded from growth of Talaromyces purpurogenus sp. on organic waste was used for dyeing of wool fabric. Under the dyeing conditions i.e. 1:30 M:L ratio, pH 5, 80º C temperature and 45 minutes dyeing time, the percent absorption could reach 57 %, 32%, 36% and 49% respectively. The wool fabric samples dyed with the fungal dye exhibited very good to excellent washing and rubbing fastness properties. The colour pigment obtained from fungal thus offered an opportunity to reduce impact on plant resources for dye source exploration. So it can be concluded from the study that a natural fungal dye could help to sustain the environment and to minimize the over exploitation of natural resources.
28
Uddin, Mohammad Gias. "Effects of Different Mordants on Silk Fabric Dyed with Onion Outer Skin Extracts." Journal of Textiles 2014 (December 10, 2014): 1–8. http://dx.doi.org/10.1155/2014/405626.
Full textAbstract:
At present, a higher demand is put towards the use of natural dyes due to increased awareness of the environmental and health hazards associated with the synthesis and use of synthetic dyes. This research was conducted using onion outer skins as a potential source of natural plant dyes. In this study, extraction of dye was carried out in aqueous boiling method. Premordanting technique was followed using different mordants, namely alum, ferrous sulphate, tin, tannic acid, tartaric acid, and their combinations on silk fabric. Fabric samples dyed without using any mordant were then compared with the dyed samples pretreated with the mordants. The range of colors developed on dyed materials was evaluated by measuring the color values with respect to K/S values and color coordinates. It was concluded that the color values were found to be influenced by the addition of mordants, and thus different fashion hues were obtained from the same amount of dye extract using different mordants. Ferrous sulphate was found as the most influential mordant. ΔEcmc values between unmordanted (Reference dyed) and metallic mordanted fabric samples were found higher than those between unmordanted and nonmetallic mordanted fabric samples. The dyed samples were evaluated for color fastness to washing, light, drycleaning, rubbing, and perspiration. The color fastness properties were found to be satisfactory and improved in many cases. From the fastness results, it was obvious that these dyes can also be applied on silk fabric without using any mordant if required.
29
Pan, Yun Fang. "Using Natural Dyes to Prepare Nanoporous TiO2 Dye-Sensitized Solar Cell." Advanced Materials Research 535-537 (June 2012): 2079–82. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.2079.
Full textAbstract:
Dye-sensitized solar cell has been attracting considerable attention all over the world. In this article, natural dyes were used to prepare nanoporous Tio2 dye-sensitized solar cell. The nature dyes can be extracted easily and then employed in the solar cell to reduce material cost. At the same times, the dyes were non-toxic, environmentally friendly and fully biodegradable. Black rice, curcuma and red cabbage were used to prepare the organic natural dyes. The best dyes obtained from red cabbage as chlorophyll dyes that have the efficiency of energy conversion 0.05%.
30
Ali, N. F., R. S. R. EL Mohamedy, and E. M. El- Khatib. "Antimicrobial Activity of Wool Fabric Dyed with Natural Dyes." Research Journal of Textile and Apparel 15, no. 3 (August 1, 2011): 1–10. http://dx.doi.org/10.1108/rjta-15-03-2011-b001.
Full textAbstract:
Natural dyes extracted from Cassia fistula and onion peels are used to dye wool that is pretreated with chitosan by using tannic acid as a mordant. The effect of the mordant concentration on the color strength (K/S) is discussed. The results obtained indicated that K/S increases after treatment with chitosan. It is also noticed that K/S increases with an increasing concentration of chitosan. K/S also increases with an increase of mordant concentration until 4% and then decreases. The effect of the dye bath pH, dyeing temperature and dyeing time are also studied. The K/S and dye uptake exhibit high values. Good fastness properties of the dyed fabric are achieved. The antimicrobial activity of chitosan-treated wool fabric is tested in accordance to diffusion agents. Test organisms, such as Escherichia coli, Bacillus subitilus Pseudomons aeruginosa and Staphylococcus aureus are used and the results indicate that the samples treated with a lower concentration of chitosan exhibit a smaller inhibition zone.
31
Zhu, Zhao Yu, Lai Jiu Zheng, Bing Du, Ju Wei, Yong Fang Qian, and Jun Feng Sui. "Study on Alizarin Dyes on Polyester-Cotton Knitted Fabrics Dyeing in Supercritical CO2." Advanced Materials Research 821-822 (September 2013): 556–59. http://dx.doi.org/10.4028/www.scientific.net/amr.821-822.556.
Full textAbstract:
Using natural alizarin dyes to dye polyester - cotton65/35 knitted fabric in supercritical CO2dyeing equipment, and analysis the influencing parameters including dyeing temperature, time and pressure. The parameters are optimized as following: dyeing temperature 115.21°C, dyeing time 71.42 min and dyeing pressure 26.22 Mpa. Adopting alizarin dyes to dye polyester-cotton65/35 knitted fabrics in supercritical CO2could obtain a good dyeing effect, and the color fastness to rubbing and color fastness to washing of dyed fabrics meet The National Standard (GB18401-2003).
32
., Suciatmih. "Effect of Different Mordants on Cotton Cloth Dyed with Aspergillus and Penicillium Dyes." Aceh International Journal of Science and Technology 6, no. 1 (April 17, 2017): 19. http://dx.doi.org/10.13170/aijst.6.1.5372.
Full textAbstract:
Natural dyes are an important alternative to potentially harmful synthetic dyes. This research was conducted using three kinds of Aspergillus dyes and six kinds of Penicillium dyes. In this study, Aspergillus and Penicillium were grown in mineral salts glucose medium. Premordanting technique was followed using different mordants, namely alum, CaCO3, CuSO4 5H2O, FeSO4 7H2O, K2Cr2O7 and MnSO4 H2O on cotton cloth. The colour of filtrate and range of colours developed on dyed materials were measured by RHS colour chart. The results indicated that the colour of dyed cloth was influenced by the addition of mordants, and different shades were obtained from the same dye filtrate using different mordants. FeSO4 7H2O was found as the most influential mordant. The present study shows a new source of fungal dyes, which can be used as an alternative for dyeing cloth.   Â
33
Uddin, Md Koushic, Mustafizur Rahman, Shuva Bhattacharjee, Susmita Singh, and Shanjid Khan Mojlish. "Dyeing of Cotton Knit Fabric with Natural Dyes Extracted from Java Plum." AATCC Journal of Research 8, no. 6 (November 2021): 41–46. http://dx.doi.org/10.14504/ajr.8.6.5.
Full textAbstract:
Natural dyes extracted from natural sources are likely to be less harmful and more eco-friendly than synthetic dyes. In this study, cotton fabric was dyed with natural dyes extracted from Java plum fruit ( Syzygium cumini). Dyeing was accomplished with or without mordanting agents using simultaneous and post-mordanting methods. The color of the treated substrates was investigated in terms K/S and CIELAB values. In addition, the attenuation co-efficient and solubility in organic solvents of the extracted dyes were determined. The wash and rubbing fastness of the dyed fabrics were good to excellent. Deep shades were obtained by post mordanting method with ferrous sulfate, whereas alum treated fabrics produced brighter shades with excellent fastness. Java plum fruit is available in many countries and offers a possible substitute for synthetic dyes.
34
Hernhow, Panuwat, Potjanart Suwanruji, Thitinun Karpkird, and Jantip Suesat. "Dyeing and Fastness Properties of Natural Dyes on Cotton Grafted with Monochlorotriazine-β-Cyclodextrin." Advanced Materials Research 610-613 (December 2012): 590–93. http://dx.doi.org/10.4028/www.scientific.net/amr.610-613.590.
Full textAbstract:
The main goal of this work was to study the possibility of improving the natural dye uptake and their fastness properties on cotton fabrics by the application of monochlorotriazine-β- cyclodextrin (MCT-β-CD). Hence, MCT-β-CD was synthesized, characterized, and grafted on cotton fabrics via pad and cure method. The existence of MCT-β-CD on cotton fabrics was confirmed by nitrogen content (%N). Natural dyes used were colorants extracted from turmeric and cassumunar powders, and a commercial natural dye i.e. Natural Red Brown. The commercial one was water soluble whereas the extracted dyes were sparingly soluble in water. These natural dyes were applied on cotton by pad-dry method. The extracted dyes on MCT-β-CD treated cotton fabrics gave higher visual color yield (K/S) than the untreated ones. In contrast, a commercial natural dye exhibited lower color yield on the treated fabrics because of its water soluble nature. The color fastnesses of the natural dyes on the treated cotton fabrics were improved from the untreated cotton samples.
35
Nakhaei, Roohollah, Alireza Razeghizadeh, Pejman Shabani, Jabbar Ganji, and Seyed Sajjad Tabatabaee. "Photoabsorption Enhancement in Synthetic-Natural Dye-Sensitized Solar Cells Using Bilayer TiO2 Deposition and Separated Sensitization." International Journal of Photoenergy 2022 (April 4, 2022): 1–17. http://dx.doi.org/10.1155/2022/5949837.
Full textAbstract:
In this study, a new methodology is proposed for the cosensitization of dye-sensitized solar cells by synthetic and natural dyes to increase their optical absorption. Synthetic dyes are efficient but expensive. In contrast, natural dyes are cheap but have a low adsorption rate in competition with synthetic dyes. Therefore, the conventional cosensitization method which is based on dye mixing prevents complete adsorption of natural dyes. In this work, a bilayer deposition of TiO2 and separated sensitization of each layer by one type of dye was performed. The N719 was used as a synthetic dye and betanin, crocin, acacetin, and indigo were used as natural dyes, which are extracted from plants inexpensively. The dyes were evaluated by UV-visible and FT-IR analyses. The results showed that a broad spectrum can be achieved due to different peaks in the photoabsorption spectra of these dyes. The bottom layer was sensitized by natural dyes while the top layer was sensitized by N719. Due to the effect of temperature on dyes, a low-temperature method based on acid-assistant sintering has been used for the top layer. The results of XRD and FESEM analyses indicated that a layer with proper crystalline phase, acceptable morphology, and good porosity can be achieved in the low-temperature process by tunning the acid concentration. The electrical properties of the fabricated solar cells were investigated by EIS analysis and J-V characteristics. The results showed that charge injection and transportation were improved via the ability of the proposed approach in separated dye adsorption. An efficiency of 3.48% was provided by the proposed method which demonstrates its better performance in comparison with the cocktail and sequential methods that showed efficiencies of 1.88% and 2.29%, respectively. The results indicated that separated sensitization of each layer can improve the dye loading leading to spectral expansion.
36
Pelc, Corrie. "Au Naturel: The Impact of Natural Dyes." AATCC Review 15, no. 4 (July 1, 2015): 32–39. http://dx.doi.org/10.14504/ar.15.4.1.
Full text
37
Pandey, Durga Prasad, Numkant Parajuli, Anil Devkota, Sangam Aryal, and Netra Lal Bhandari. "Eco-friendly Methods of Natural Dye Extraction from Bark of Ficus religiosa and Their Impacts on Dyeing Technology in Nepal." NUTA Journal 7, no. 1-2 (December 31, 2020): 42–51. http://dx.doi.org/10.3126/nutaj.v7i1-2.39930.
Full textAbstract:
Plant-based natural dyes are eco-friendly and less allergic to the human body. Different reports on toxicity and allergic reactions that appeared in synthetic dyes cause interest in natural dyes in recent years. The present study focused on the feasibility of aqueous extraction of plant dyes from the bark of Ficus religiosa (Peepal), a historical tree of Hindu culture. Extracted dyes were characterized by ultra-violet visible (UV-Vis) spectroscopy and Fourier transform infrared (FTIR) spectroscopy to reveal the structural and functional confirmation of extracted dye. Dye was used for dyeing fabric using both natural and commercial mordant. Mordants such as lemon juice and metallic salts such as potassium dichromate (K2Cr2O7), copper sulphate (CuSO4.5H2O), and iron sulphate (FeSO4) are used to set extracted dye on cotton fabrics and other fibers. This research aims to find the effectiveness and feasibility study of the use of natural mordant instead of metallic mordant. The use of natural dyeing with natural mordant is very effective for health purpose but found to be expensive.
38
Ma, Xiaofei, Yujuan Wei, Shuo Wang, Xin Zuo, and Baolei Shen. "Sustainable ultrasound-assisted ultralow liquor ratio dyeing of cotton fabric with natural turmeric dye." Textile Research Journal 90, no. 5-6 (October 1, 2019): 685–94. http://dx.doi.org/10.1177/0040517519878793.
Full textAbstract:
Natural dyes are environmentally friendly and have become important alternatives to synthetic dyes in some dyeing products. Therefore, better extraction and dyeing techniques need to be developed for the dyeing process of natural dyes. In this work, cotton fabric was dyed using turmeric extraction solution under an ultralow liquor ratio (materials to liquor ratio of 1:5) and ultrasonic-assisted conditions. Dye extraction using different dispersants and pH values has been investigated and three-factor-three–level Box–Behnken design was employed to explore the dyeing conditions. It was found that sodium dodecyl sulfate systems and ultrasonic waves can effective improve the dyeing depth under neutral condition. The K/ S value can reach 2.53 with ultrasonic power of 200 W, dyeing time of 30 min and temperature of 40℃. Scanning electron microscope images showed that the application of ultrasound did not cause obvious fiber damage. The developed technique could be used in the textile industry to make dyeing cotton fibers with natural dyes more sustainable than it is at present.
39
Botteri, Lea, Anja Miljković, and Martinia Ira Glogar. "Influence of Cotton Pre-Treatment on Dyeing with Onion and Pomegranate Peel Extracts." Molecules 27, no. 14 (July 16, 2022): 4547. http://dx.doi.org/10.3390/molecules27144547.
Full textAbstract:
In this paper the possibility of applying natural dyes on cellulose fibres were researched with respect to the impact of cotton material pre-treatment (scouring, chemical bleaching, mercerization and mordanting), using renewable sources of natural dyes (waste as a source). As mordants, metal salts of copper, aluminium and ferrum were used, and the influence on colour change as well as on fastness properties were analysed. The natural dyes were extracted from onion peel (Allium cepa L.) and pomegranate peel (Punica granatum L.). In spectrophotometric analysis performed of the plant extracts, the onion extract has peaks at 400 and 500 nm, resulting in red-orange colourations and the pomegranate extract shows a maximum at 400 nm, i.e., in the yellow region, which is characteristic of punicalin. Results show significant influence of cotton pre-treatments on colour appearance and fastness properties, caused by pre-treatments affecting the properties and structure of the cotton itself. The positive effect of mercerization on dye absorption and bonding is confirmed. For wash and light fastness properties, more satisfactory results have been obtained for yarns dyed with pomegranate peel natural dye, and the key importance of mordants for fastness properties has been confirmed.
40
Tayade, Priti B., and Ravindra V. Adivarekar. "Colour gamut with easy sources of natural dyes." International Journal of Clothing Science and Technology 28, no. 5 (September 5, 2016): 558–69. http://dx.doi.org/10.1108/ijcst-12-2015-0136.
Full textAbstract:
Purpose In nature, thousands of different colours and shades exist. Basic set of dyes, namely, yellow, red, blue and green are necessary for a complete colour gamut. Creating a complete gamut with natural dyes with one common extraction and application procedure is not exploited hitherto. The paper aims to discuss this issue. Design/methodology/approach In this study, an attempt was made to create a complete colour gamut with easily available natural dyes with one common extraction and application procedure. Findings Silk fabrics were dyed using various natural dyes alone and in combination to yield various shades, namely, yellow, red, green, blue. Pre-mordanting of silk fabrics was carried out with mordants, namely, alum, ferrous sulphate, copper sulphate, stannous chloride, potassium dichromate followed by dyeing. The fastness properties and colour strength values of all the shades obtained were determined. Originality/value Creating a complete gamut with natural dyes with one common extraction and application procedure is not exploited hitherto.
41
Baaka, Noureddine, Ramzi Khiari, and Aminoddin Haji. "Ecofriendly Dyeing of Textile Materials with Natural Colorants from Date Palm Fiber Fibrillium." Sustainability 15, no. 2 (January 16, 2023): 1688. http://dx.doi.org/10.3390/su15021688.
Full textAbstract:
Natural dyes have become an interesting subject of study because of their superior ecological properties in comparison to their synthetic counterparts. This explains the great amount of research developed in this regard, especially when the dye used was derived from a natural product’s waste. This research aims to evaluate the affinity of the dye extracted from date palm fibrillium to a multifiber fabric. This choice was made to investigate a comparison of the dyeability of many kinds of textile fibers with the obtained colorant from the date palm fibrillium. It was shown that the different types of fibers were well-dyed. The darkest dyes were obtained especially by using wool and nylon fabrics. In view of these results, wool and nylon fibers were selected for developing a dyeing investigation. The effect of the most important operational conditions such as temperature, pH, and dyeing time on the dyeing quality results has been investigated. Color yield (K/S) and CIELab values (L*, a*, b*, C*, h*) were used to evaluate the dyeing properties. The utilization of durable chemicals and bio-mordants both pre and post-dyeing resulted not only in new dyes but also in improved speed rates.
42
Lech, Katarzyna, and Emilia Fornal. "A Mass Spectrometry-Based Approach for Characterization of Red, Blue, and Purple Natural Dyes." Molecules 25, no. 14 (July 15, 2020): 3223. http://dx.doi.org/10.3390/molecules25143223.
Full textAbstract:
Effective analytical approaches for the identification of natural dyes in historical textiles are mainly based on high-performance liquid chromatography coupled with spectrophotometric detection and tandem mass spectrometric detection with electrospray ionization (HPLC-UV-Vis-ESI MS/MS). Due to the wide variety of dyes, the developed method should include an adequate number of reference color compounds, but not all of them are commercially available. Thus, the present study was focused on extending of the universal analytical HPLC-UV-Vis-ESI MS/MS approach to commercially unavailable markers of red, purple, and blue dyes. In the present study, HPLC-UV-Vis-ESI MS/MS was used to characterize the colorants in ten natural dyes (American cochineal, brazilwood, indigo, kermes, lac dye, logwood, madder, orchil, Polish cochineal, and sandalwood) and, hence, to extend the analytical method for the identification of natural dyes used in historical objects to new compounds. Dye markers were identified mostly on the basis of triple quadrupole MS/MS spectra. In consequence, the HPLC-UV-Vis-ESI MS/MS method with dynamic multiple reaction monitoring (dMRM) was extended to the next 49 commercially unavailable colorants (anthraquinones and flavonoids) in negative ion mode and to 11 (indigoids and orceins) in positive ion mode. These include protosappanin B, protosappanin E, erythrolaccin, deoxyerythrolaccin, nordamnacanthal, lucidin, santalin A, santalin B, santarubin A, and many others. Moreover, high-resolution QToF MS data led to the establishment of the complex fragmentation pathways of α-, β-, and γ- aminoorceins, hydroxyorceins, and aminoorceinimines extracted from wool dyed with Roccella tinctoria DC. The developed approach has been tested in the identification of natural dyes used in 223 red, purple, and blue fibers from 15th- to 17th-century silk textiles. These European and Near Eastern textiles have been used in vestments from the collections of twenty Krakow churches.
43
Sen, Arnab, Avijit Bhowal, and Siddhartha Datta. "Application of natural dye on polytrimethylene terephthalate fiber." Research Journal of Textile and Apparel 23, no. 1 (March 11, 2019): 71–90. http://dx.doi.org/10.1108/rjta-06-2018-0041.
Full textAbstract:
PurposeThis paper aims to investigate the feasibility of developing an eco-friendly dyeing process for a regenerated polyester fiber (polytrimethylene terephthalate) using a natural dye (Lac) and bio-mordant.Design/methodology/approachThe effects of temperature, time, initial pH of dye bath, material to liquor ratio and mordant concentration on color strength of polytrimethylene terephthalate fiber dyed with Lac were examined. The results were compared using three bio-mordant (catechu, myrobalan and pomegranate) and three inorganic mordant (alum, ferrous sulfate and stannous chloride). Single replicate of 25-design methodology was used to identify three significant factors affecting color strength, and optimization was done using response surface methodology based on 23-central composite rotatable design.FindingsColor strength achieved using catechu as a bio-mordant was close to that with ferrous sulfate and higher than with stannous chloride. Temperature, initial pH and mordant concentration were identified as significant factors affecting color strength of dyed fiber with catechu. Optimization revealed temperature of 133OC, initial pH of 6 and bio-mordant (Catechu) concentration of 10 per cent to be the optimal conditions for dyeing, with K/S value of 4.55.Originality/valueThe study revealed the possibility of satisfactory dyeing of regenerated polyester fibers with natural dyes, replacing disperse dyes. The comparison of color strength achieved indicated the possibility of replacing inorganic mordant with bio-mordant in such dyeing process. The dyeing process could thus be made more eco-friendly by removal of toxic chemicals from effluents.
44
Hardani, Hardani, Hendra Hendra, Muh Iman Darmawan, C. Cari, and Agus Supriyanto. "Fabrication of dye natural as a photosensitizers in dye-sensitized solar cells (DSSC)." Journal of Theoretical and Applied Physics 1, no. 1 (February 7, 2017): 21. http://dx.doi.org/10.20961/jotap.v1i1.4704.
Full textAbstract:
<p class="Abstract">The purpose of this study was to obtain optical properties (absorption spectrum) and electrical properties (photoconductivity) of organic dyes in DSSC performance. optical and electrical properties were tested by using UV-Visible Spectrophotometer and Elkahfi 1601 PC 100 / IV meter, respectively, while Keithley Type 2600A is used for the characterization of DSSC. This study is a great base to explore and investigate the development of DSSC solar cells using natural dyes (organic). Spectra optimal absorption and photoconductivity produced by natural dyes (organic). The results of this study indicate that the absorption spectrum of natural dyes (organic) in the range of 300-500 nm. electrical characteristics (I-V) of the increase in linear dye under illumination. I-V characteristics of DSSC from organically produced natural dyes to color the biggest-mangosteen obtained Voc of 565 mV; JSC = 1.52 A / m2; FF = 0.12; and η_ef is approximately 0.09%, respectively,. The conclusion of this study, natural dyes (organic) can be an attractive alternative as a dye.</p>
45
Hardani, Hardani, Hendra Hendra, Muh Iman Darmawan, C. Cari, and Agus Supriyanto. "Fabrication of dye natural as a photosensitizers in dye-sensitized solar cells (DSSC)." Journal of Physics: Theories and Applications 1, no. 1 (March 8, 2017): 21. http://dx.doi.org/10.20961/jphystheor-appl.v1i1.4704.
Full textAbstract:
<p class="Abstract">The purpose of this study was to obtain optical properties (absorption spectrum) and electrical properties (photoconductivity) of organic dyes in DSSC performance. optical and electrical properties were tested by using UV-Visible Spectrophotometer and Elkahfi 1601 PC 100 / IV meter, respectively, while Keithley Type 2600A is used for the characterization of DSSC. This study is a great base to explore and investigate the development of DSSC solar cells using natural dyes (organic). Spectra optimal absorption and photoconductivity produced by natural dyes (organic). The results of this study indicate that the absorption spectrum of natural dyes (organic) in the range of 300-500 nm. electrical characteristics (I-V) of the increase in linear dye under illumination. I-V characteristics of DSSC from organically produced natural dyes to color the biggest-mangosteen obtained Voc of 565 mV; JSC = 1.52 A / m2; FF = 0.12; and η_ef is approximately 0.09%, respectively,. The conclusion of this study, natural dyes (organic) can be an attractive alternative as a dye.</p>
46
He, Zhi Peng, Zan Min Wu, and Xiao Li Zhou. "Sorghum Red Pigment Dyeing Properties of Tencel Loose Fibre." Advanced Materials Research 331 (September 2011): 275–78. http://dx.doi.org/10.4028/www.scientific.net/amr.331.275.
Full textAbstract:
Dyeing of tencel loose fibre with sorghum red pigment as natural dyes has been studied. The values of dye uptake and fixation ratio have been calculated and disscussed. The effect of dyeing time, dyeing temperature, dye concentration and salt concentration were studied. Dye uptake and fixation ratio were high, and the fastness of dyed fibre were good.
47
Ali, Falah H. "Solar cells based on natural dyes prepared using anatase phase titanium dioxide." Iraqi Journal of Physics (IJP) 16, no. 39 (January 5, 2019): 28–32. http://dx.doi.org/10.30723/ijp.v16i39.99.
Full textAbstract:
Natural dye sensitized solar cell was prepared using strawberry and pomegranate dyes with anatase nanocrystalline titanium dioxide powder. A study of the optical properties of the two dyes, involving the absorption spectrum was determined in the visible region. I-V characteristics under illumination were performed. The results showed that the two prepared dye sensitized solar cells have acceptable values efficiency about (0.94 with Fill factor (45)) and (0.74 with Fill factor (44)) for strawberry and pomegranate dyes, respectively.
48
Ishak, Siti Aisyah, Mohamad Fared Murshed, Hazizan Md Akil, Norli Ismail, Siti Zalifah Md Rasib, and Adel Ali Saeed Al-Gheethi. "The Application of Modified Natural Polymers in Toxicant Dye Compounds Wastewater: A Review." Water 12, no. 7 (July 17, 2020): 2032. http://dx.doi.org/10.3390/w12072032.
Full textAbstract:
The utilization of various types of natural and modified polymers for removing toxicant dyes in wastewater generated by the dye industry is reviewed in this article. Dye wastewater contains large amounts of metals, surfactants, and organic matter, which have adverse effects on human health, potentially causing skin diseases and respiratory problems. The removal of dyes from wastewaters through chemical and physical processes has been addressed by many researchers. Currently, the use of natural and modified polymers for the removal of dyes from wastewater is becoming more common. Although modified polymers are preferred for the removal of dyes, due to their biodegradability and non-toxic nature, large amounts of polymers are required, resulting in higher costs. Surface-modified polymers are more effective for the removal of dyes from the wastewater. A survey of 80 recently published papers demonstrates that modified polymers have outstanding dye removal capabilities, and thus have a high applicability in industrial wastewater treatment.
49
Bhattacharya, Dr Sumanta. "Study on Exhaustion Behaviour of Red Chili on Cotton Fabric." International Journal for Research in Applied Science and Engineering Technology 9, no. 11 (November 30, 2021): 1022–29. http://dx.doi.org/10.22214/ijraset.2021.38964.
Full textAbstract:
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 exhaustion of dye extracted from red chillies, one of the most used vegetables same has been studied on cotton fabrics at different temperatures using UV-Visible light spectrophotometer. The colour strength of the fabric before and after application of soap therein are also studied experimentally. Keywords: Natural dye, red chillies, cotton fabrics, exhaustion of dye, absorption.
50
Sahu, Kirti, Mahesh Dhonde, and V. V. S. Murty. "Efficiency of Solar Cells Based on Natural Dyes with Plasmonic Nanoparticle-Based Photo Anode." International Journal of Nanoscience 18, no. 06 (October 10, 2018): 1850042. http://dx.doi.org/10.1142/s0219581x18500424.
Full textAbstract:
Cheap and efficient dye sensitized solar cells (DSSCs) can be prepared using natural dyes responding in the visible region of solar spectrum. Localized surface plasmon resonance (LSPR) plays a very important role for the improvement in the efficiency of DSSCs by using Plasmonic nanoparticles (PNPs) for exploiting the visible portion of the solar radiation by transferring the energy from dye to PNP. This energy transfers from dye to semiconductor TiO2 through PNP which increases the overall photo catalytic activity. In the present study, Al-doped TiO2 photoanodes were prepared via sol–gel route and used for DSSC application. Various natural and synthetic dyes are prepared and the optical transmittance and absorbance of the dyes are measured in the wavelength range of 250–850[Formula: see text]nm using UV-Vis spectroscopy and they are used in DSSC. Natural dyes extracted from fruits and synthetic dye based on Ruthenium (Ru) metal complex is used as sensitizers. Power conversion efficiency (PCE) of solar cells utilizing different dyes is compared. Out of the various natural dyes, beetroot and strawberry extracts based dyes show good absorbance in the visible range of electromagnetic spectrum. On the other hand, synthetic dyes based on Ru complex show strong absorbance over a wide range of visible spectrum. The absorbance increases with increase in concentration of Ru in ethanol. The extracts of beetroot, strawberry and mixed fruits show a peak in absorbance spectra at 501nm, 416nm and 332nm, respectively, indicating the absorption over a wide range of visible spectrum. Maximum efficiency of DSSCs utilizing PNPs sensitized with beetroot and strawberry dyes are found to be 1.5% and 1.3%, respectively.