Ecofriendly Dyeing of Textile Materials with Natural Colorants from Date Palm Fiber Fibrillium

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

Sustainable Dyeing of Wool Fabric Using Kermes Oak (Quercus Coccifera L) as Source of Natural Colorant

The present study was concerned with the extraction of natural colorant from kermes oak (Quercus coccifera L.) fruits and the application of the extracted dye on wool fibers in the presence and absence of various mordants. The effect of dyeing time and dye bath temperature were investigated. The effect of mordant type with different mordanting methods on dyeing quality was also examined. Four salt metals were used in this study; ferrous sulfate, stannous chloride, alum, and copper sulfate. The effect of these mordants on color of dyed wool samples was investigated in terms of CIELab (L*, a*, b*) and K/S values. Light, washing, and rubbing fastness of dyed samples were evaluated according to ISO standards. The obtained shades for the control samples were brown; while the mordanted samples a wide range of light to dark brownish colors with a significant enhancement in color strength values. The results indicated that mordanting gave deep shades and enhanced fastness properties

Ecofriendly Dyeing of Textile Materials with Natural Colorants from Date Palm Fiber Fibrillium

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

Tannin-rich natural dye extracted from kermes oak (Quercus coccifera L.): Process optimization using response surface methodology (RSM)

The present research reports the extraction of natural colorant from kermes oak (Quercus coccifera L.) fruits. Response surface methodology (RSM) with the help of Minitab (Version 17, State College, PA, USA) was used for the optimization of the extraction process and the evaluation of different operating parameters interaction effects. Three independent parameters including extraction temperature, extraction time, and mass of the kermes oak were studied. According to the results, the optimum extraction was obtained at a temperature of 72°C, an extraction time of 70 min, and a mass of 2 g. Under these optimum conditions, the efficiency of extraction was found to be 3792 mg.L−1. Fourier Transform Infrared Spectroscopy was used to identify the major chemical groups in the extracted dye. The coloring ability of the extracted dye, obtained under the optimal conditions, was tested on wool and cotton fabrics, and its effect on color strength and color fastness to rubbing, light, and washing was investigated. Results of color characteristics showed that the color coordinates of the dyed samples were situated in the red-yellow quadrant of the CIELabcolor space

Eco-friendly dyeing of modified cotton fabrics with grape pomace colorant: Optimization using full factorial design approach

Grape pomace, which is a winery waste is studied and experimented to serve as a source of natural dyes that could be utilized in textile dyeing. In previous studies, it was found that grape pomace released from wine industry contains valuable resource of abundant natural coloring substances. The present work involves the optimization of dyeing process of cotton by natural colors extracted from grape pomace. The optimized dyeing conditions were; dyeing bath temperature 100°C, dyeing time 55 min, and dye bath pH 8. In addition, it was demonstrated that the dye bath of dyed cotton reduced the Chemical Oxygen Demand (COD) and the Biological Oxygen Demand (BOD)5 of the dye bath

Optimisation of the recovery of carotenoids from tomato processing wastes: application on textile dyeing and assessment of its antioxidant activity

<p>The present study has been focused on the extraction of natural pigments from tomato industry waste. At first, different solvents and solvents mixture were compared to determine which one is the best for extracting carotenoids compounds from tomato by-products. A mixture of hexane and acetone gave the highest carotenoids extraction yield among the others examined. The extraction conditions were optimised using a five-level–five-factor central composite design. Under optimal conditions, solvent solid ratio 90, hexane percentage in the solvent mixture 60, extraction duration 50, number of extractions 4 and extraction temperature 35 °C, the yield of carotenoids was 80.7 μg/g. The coloured extract of tomato by-products was applied on textile fabrics to investigate the dyeing characteristics and antioxidant activities. The results indicate that extract can be applied on textile fabrics (wool, silk and polyamide) to produce coloured clothing with acceptable antioxidant properties.</p

Application of Prunus amygdalus By-products in Eco-friendly Dyeing of Textile Fabrics

International audienceNatural dyes have become an interesting subject of study because of their better ecological properties in comparison to their synthetic counterparts. This article concerns the dyeing of wool, silk, and polyamide fabrics with natural dyes extracted from almond shells and stems. The developed method of dyeing by these extracts is interesting and very attractive for several reasons: firstly, the extracts used are the black liquor discharged from the industries of delignification, which is a chemical process for removing lignin from agricultural wastes to produce a cellulosic fiber; (ii) these natural dyes are renewable and available in large quantities; (iii) this method is economical; and (iv) lastly, the dyeing performances of the obtained dyed textiles are very promising. The color of each dyed material was investigated in terms of the CIELAB coordinates and their fastness properties measured by washing, rubbing, and light

A novel natural source <i>Vicia faba</i> L. membranes as colourant: development and optimisation of the extraction process using response surface methodology (RSM)

<p>In this research paper, an eco-friendly extraction process of dyes from <i>Vicia faba</i> L. membranes was developed. In this regard, the influence of independent process factors like the weight of material, the extraction time, the temperature and the sodium hydroxide concentration on the natural dye extraction from <i>Vicia faba</i> membranes was investigated. The optimisation of the extraction conditions and the effect evaluation of the different operating parameters were carried out using a Box–Behnken design under response surface methodology. The optimum conditions were found to be 66 °C, 90 min, 5 g and 0.1628 mol·L⁻¹ for extraction temperature, time, mass of the material and sodium hydroxide concentration, respectively. The efficiency of this extraction process under these optimum conditions was evaluated by measuring the total phenolic content (TPC), the total flavonoid content and the relative colour yield (<i>K</i>/<i>S</i>). In these operating conditions, good fastness ratios were observed for the dyed fabrics.</p