scholarly journals Eco-friendly isolation of tannin based natural colorant from coconut coir (Cocos nucifera) for dyeing of bio-mordanted wool fabric

2020 ◽  
Keyword(s):  
Natural Products ◽  
Cocos Nucifera ◽  
Natural Fibers ◽  
Microwave Treatment ◽  
Wool Fabric ◽  
Synthetic Dyes ◽  
Natural Colorant ◽  
Wool Fabrics ◽  
Coconut Coir ◽  
Glauber Salt

<p>Due to hazardous effluent load of synthetic dyes, the global community is now seeking inclusion of natural products particularly green dyes and pigment in various fields. Current study has been concerned with utilization of eco-friendly tools for isolation of colorants from plant wastes such as coconut coir (Cocos nucifera) for coloration of natural fibers such as wool. Coconut based Tannin was isolated after exposure by microwave treatment for 1-6 min in various media following by optimization of dyeing variables. Excellent yield onto fabric were obtained when coconut coir extract of 1 pH containing 5g/100 mL Glauber salt, was used to dye at 65 oC for 65 min. To develop new shades among mordants used, bio-mordanted wool fabrics exhibited more excellent shades than chemical ones with excellent fastness ratings. It has been concluded that Microwave treatment has excellent potential to isolate natural dye from plant wastes, where the introduction of bio-mordants for shade depth and fastness characteristics has made process more sustainable and viable for natural fibers coloration.</p>

Sustainable ultrasonic dyeing of wool using coconut coir extract

2019 ◽  
Vol 90 (7-8) ◽  
pp. 744-756 ◽  
Author(s):  
Shahid Adeel ◽  
Shumaila Kiran ◽  
Noman Habib ◽  
Atya Hassan ◽  
Shagufta Kamal ◽  
...  
Keyword(s):  
Cocos Nucifera ◽  
Added Value ◽  
Wool Fabric ◽  
Synthetic Dyes ◽  
Wool Fabrics ◽  
Coconut Coir ◽  
Wool Dyeing ◽  
Natural Fabrics ◽  
Textile Sector ◽  
Harmful Effects

Due to an increasing awareness of the harmful effects of synthetic dyes among the global community, the demand for natural dyes in the textile sector has increased. The current study has been conducted to explore coconut coir, that is, Cocos nucifera, as a new dye yielding plant for wool dyeing under ultrasonic (US) radiation. Unirradiated and US-irradiated extracts of coconut coir were utilized to dye unirradiated and US-irradiated wool fabrics. To make the process more sustainable, acacia, henna, turmeric and pomegranate extracts as biomordants were used to dye wool fabric at 65℃ for 45 min. It was found that a good color yield was achieved by dyeing US-treated wool with US-treated acidic methanolic extract at 65℃ for 45 min. It is found that biomordanting profoundly added value in coloration and also enhanced the fastness rating of the dyed wool fabrics. It is concluded that US rays have excellent efficacy for exploring the coloring wealth of plants for dyeing of natural fabrics.

Aqueous extraction of buckwheat hull and its functional application in eco-friendly dyeing for wool fabric

2019 ◽  
Vol 90 (5-6) ◽  
pp. 641-654 ◽  
Author(s):  
Wei Zhang ◽  
Jiming Yao ◽  
Peng Huang ◽  
Shuai Xing
Keyword(s):  
Textile Industry ◽  
Langmuir Model ◽  
Uv Protection ◽  
Wool Fabric ◽  
Synthetic Dyes ◽  
Dyeing Process ◽  
Wool Fabrics ◽  
Monolayer Adsorption ◽  
Reduction Stability ◽  
Agricultural Byproduct

As a cheap and abundant agricultural byproduct, buckwheat hull is expected to be applied in many fields such as textile, biotechnology, and medicine. In this paper, the physicochemical properties of buckwheat hull extraction (BHE) and its dyeing abilities for wool fabric with different eco-friendly mordants and methods were studied. The theoretical process, colorfastness, and UV-protection properties of the dyed wool fabric with BHE were investigated. The results showed that BHE solution had good thermal and reduction stability. The dyeing process of BHE on wool was in accordance with the Langmuir model and had uniform monolayer adsorption. Wool fabrics dyed directly or through a mordanting process demonstrated good washing colorfastness and acceptable crocking- and light colorfastness. The dyed wool fabrics with KAl2+ and meta-mordanting showed excellent UV-protection as well as exceptional antibacterial activity against Escherichia coli. Therefore, BHE presents a novel alternative for some synthetic dyes that are applied in the textile industry.

Shrinkage Properties of Wool Treated with Ionic Liquid and Chitosan Biopolymer

2011 ◽  
Vol 331 ◽  
pp. 326-329
Author(s):  
Huai Fang Wang ◽  
Hai Ning Lv ◽  
Xiao Li Zhang
Keyword(s):  
Ionic Liquid ◽  
Acetic Acid ◽  
Acid Solution ◽  
Acetic Acid Solution ◽  
Wool Fabric ◽  
Sem Images ◽  
Chitosan Concentration ◽  
Wool Fabrics ◽  
Pretreatment Temperature ◽  
Chitosan Biopolymer

In order to improve the shrinkage resistance of wool fabrics, a new method that combine ionic liquid and chitosan was researched in this paper. Wool fabric was first pretreated with 1 - butyl - 3 - methyl bromination imidazole([Bmim]Br）, and subsequently was treated with chitosan. Pretreatment temperature and time, and chitosan concentration of post-treatment were studied in this paper. Results showed that wool fabrics treated with [Bmim]Br at 80°C for 2 hours and post-treated in 1.0% chitosan acetic acid solution exhibit good shrinkage resistance. In addition, SEM images of ionic liquid treated wool fiber indicates that the scales have been destroyed, and the surface is covered with a layer of film after post-treated with chitosan.

Dyeing Properties to Wool Fabrics of Catechu Dye Purified by Micro-Filtration Membrane

2008 ◽  
Vol 12 (1) ◽  
pp. 32-38 ◽  
Author(s):  
Xiuliang Hou ◽  
Li Wei ◽  
Xinlong Zhang ◽  
Huihui Wu ◽  
Qicheng Zhou ◽  
...  
Keyword(s):  
Ph Value ◽  
Wool Fabric ◽  
Color Fastness ◽  
Color Changes ◽  
Ph Values ◽  
Filtration Membrane ◽  
Wool Fabrics ◽  
Characteristic Values ◽  
The Stability ◽  
Different Levels

Catechu liquor, which is deep brown-red in color, was purified with a micro-filtration membrane and the stability of catechu dye to different levels of temperatures and pH were investigated in this paper. The effects of the dyeing conditions on color characteristic values and color fastnesses of the dyed wool fabrics were also investigated. The results show that the liquor of catechu dye is stable at pH values of 3-7 and its color changes to a deeper brown-red when its pH value is above 8. The preferable dyeing conditions for wool fabric with refined powder catechu dye are as follows: dyeing temperature of 100±C, pH value of 6.5 for the dye bath and catechu dye of 1-4% (o.w.f). The dyed wool fabric has good color fastnesses to washing, alkali perspiration and dry rubbing. However, its color fastness rating to wet rubbing is poor, ranging from 2-3. Further research will be needed on this aspect.

scholarly journals FORMULASI DAN UJI SIFAT FISIK MASKER ANTIJERAWAT DARI EKSTRAK SABUT KELAPA ( Cocos nucifera L)

2020 ◽  
Vol 2 (1) ◽  
pp. 42-51
Author(s):  
Fauziah Fauziah ◽  
Rima Marwarni ◽  
Azmalina Adriani
Keyword(s):  
Physical Properties ◽  
Cocos Nucifera ◽  
Face Mask ◽  
Drying Time ◽  
Coconut Coir ◽  
Cocos Nucifera L ◽  
Almost All ◽  
The Tropics ◽  
Very High ◽  
Active Substances

Coconut is a multipurpose tree for people in the tropics. Almost all parts can be used such as leaves, fruit, stems, and roots. Besides having many benefits of coconut, it also produces waste from its fruit, namely coconut fiber. Coconut coir has a very high tannin content. In general, tannin compounds can be indicated as anti-inflammatory, and anti-bacterial. The purpose of this study was to formulate the anti-acne mask from coconut coir extract and to test its physical properties. This study uses an experimental research method, in which three mask formulas are made with variations in the concentration of active substances and polyvinyl alcohol (PVA). In this study the active substance used was coconut coir extract. The formulas used are formulas A, B, and C with the concentration of active substances successively as follows: 1%, 2%, 4%. The results of research that have been carried out that the mask formula that has the best physical properties is formula B, because it fulfills the physical properties provisions of the peel off face mask including organoleptic, homogeneity, pH, dispersal power, and drying time.

scholarly journals A REVIEW ON MECHANICAL PROPERTIES OF NATURAL FIBRE REINFORCED CONCRETE FOR RIGID PAVEMENTS

2021 ◽  
pp. 266-270
Author(s):  
M.Venkata Naga Prasad ◽  
Dr.J.Sridhar
Keyword(s):  
Low Cost ◽  
Natural Fibers ◽  
Natural Fibre ◽  
Cement Matrix ◽  
Rigid Pavements ◽  
Steel Bars ◽  
Coconut Coir ◽  
The Impact ◽  
Coconut Fibers

This study focuses on fiber reinforcement, specifically the use of jute and coir as a fiber reinforcing material in concrete. Natural fibers have been used to provide substantial toughness and strength in a very fragile cement matrix composite. It is necessary to make effective changes in this regard. Uses a very alkaline cement matrix to achieve durability. It is preferable to have a chemical composition that is clear. Reinforce the cement and change the surface of the fibers composite. The usage of jute fiber in this article is discussed. Concrete and the impact it has on the characteristics of the concrete it produces, for example this is an attempt to review the work that has just been completed. In the discipline, as well as to establish a foundation for future study in that case. It is critical to create low-cost building and reinforcing techniques that are suited for developing countries. If agricultural by-products like coconut coir can be used to replace steel bars as reinforcement, building costs can be reduced. Down significantly the purpose of this study is to evaluate the characteristics of coconut fibers. Species produced in India and their uses in many fields of engineering, notably civil engineering enhancing the long-term durability of concrete and mortar using engineering as a building material with the addition of coconut fibers the overall objective is to look into the possibility of utilizing domestic resources. Wastes for construction on a tiny scale a review of several researchers’ experiences utilizing is presented in this publication. The performance of coconut coir as a reinforcing component is explored in depth.

scholarly journals An investigation of dyeability of wool fabric with red cabbage (Brassica oleracea L. var.) extract

2017 ◽  
Vol 68 (02) ◽  
pp. 108-115 ◽  
Author(s):  
BENLI HÜSEYIN
Keyword(s):  
Ph Value ◽  
Metal Salts ◽  
Wool Fabric ◽  
Red Cabbage ◽  
Ph Values ◽  
Wool Fabrics ◽  
Color Yield ◽  
Brassica Vegetables ◽  
Dyed Fabrics ◽  
Brassica Oleracea L

In this study, woollen fabrics were dyed with the aqueous extract of fresh red cabbage leaves, containing kaempferol and quercetin as the main colorant species. Brassica vegetables are rich in polyphenols, flavonoids and glucosinolates. The dyeing was carried out with and without metal salts as mordants, such as KAl(SO4)2.12H2O, CuSO4.5H2O, FeSO4.7H2O and K2Cr2O7. Pre-and meta-mordanting methods were used in this study. Mordanted wool fabrics were dyed in a dyebath prepared with different pH values. The pH values of bath were 3, 5, 7, 9 and 11, respectively. Different colors and shades can be obtained within different pH values. The dyed fabrics were evaluated through color measurements and standard wash, perspiration, light and rub fastness tests. The dye absorbed by the fabrics and color properties were measured using a spectrophotometer. The color yield of dyed fabrics is expressed by K/S, and CIELAB (L*, a* and b*) values. The effects of mordant, methods of mordanting and pH value of the dye bath on the color values were studied. Finally, satisfactory results were obtained

scholarly journals Textile dyeing by dyestuffs of natural origin

2006 ◽  
Vol 60 (5-6) ◽  
pp. 120-128
Author(s):  
Miodrag Smelcerovic ◽  
Dragan Djordjevic ◽  
Mile Novakovic
Keyword(s):  
Natural Products ◽  
Trade Policy ◽  
Textile Industry ◽  
Textile Dyes ◽  
Natural Dyes ◽  
Natural Source ◽  
Synthetic Dyes ◽  
Natural Origin ◽  
Environmental Friendly ◽  
Textile Dyeing

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.

scholarly journals BRONZE AGE WOOL FABRICS OF SOUTH SIBERIA: RESULTS OF TECHNOLOGICAL, ISOTOPIC AND RADIOCARBON ANALYSES

2020 ◽  
Vol 23 ◽  
pp. 70-81
Author(s):  
N. SHISHLINA ◽  
◽  
O. ORFINSKAYA ◽  
D. KISELEVA ◽  
P. HOMMEL ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Bronze Age ◽  
Wool Fabric ◽  
Textile Production ◽  
Wool Fabrics ◽  
Wool Fibers ◽  
South Siberia ◽  
Open Question ◽  
The Bronze Age

The paper presents the results of technological, isotopic and radiocarbon analyses of wool fabric samples from the Bronze Age burials of South Siberia. It is suggested that the appearance of wool fibers in this region was connected to the Late Andronovo population of the middle — early second half of the II mil. BC. The location of the textile production centers remains an open question, because the isotopic composition of the studied samples (nitrogen, carbon, variations of 87Sr/86Sr ratios) shows that wools textiles from the Uzhur, Uibat and Ust-Erba cemeteries could not have been produced locally.

Performance of Flame Retardant Wool Fabric Grafted with Vinyl Phosphate

2014 ◽  
Vol 9 (1) ◽  
pp. 155892501400900
Author(s):  
Fangjun Zhang ◽  
Jinping Guan ◽  
Guoqiang Chen
Keyword(s):  
Flame Retardant ◽  
Chemical Deposition ◽  
Fiber Surface ◽  
Wool Fiber ◽  
Wool Fabric ◽  
Ir Absorption ◽  
Gravimetric Analysis ◽  
Flammability Test ◽  
Wool Fabrics ◽  
Water Media

In this paper, a flame retardant dimethyl-2–(methacryloyloxyethyl) phosphate (DMMEP) was applied to wool fabrics by the graft copolymerization technique initiated with potassium persulfate (KPS) in water media. FTIR and SEM testing were used to explore the grafting evidence on the fiber surface, the SEM results show chemical deposition on the wool fiber surface and the scales could not be seen clearly. FTIR testing exhibited IR absorption of DMMEP on the wool fiber. Thermal gravimetric analysis, differential thermal analysis (DTA), and char residue morphology SEM observation show the decomposition mode of wool fabrics and infer the possible flame retardant mechanism. The phosphorus based flame retardant DMMEP was prone to promote more nonflammble char during combustion, and increased add-on of DMMEP produced increased fabric char. With a DMMEP add-on increase from 50% to 100% on the weight of wool fabric, the treated wool fabric demonstrated high flame retardancy with an LOI above 35% which means it can not be ignited with a candle like fire, and could pass the vertical flammability test. DMMEP treatment slightly affected whiteness and moisture regain, but yielded a relatively large decrease in permeability and tensile strength, which should be explored further in later research.

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