Green dyeing of microwave treated silk using coconut coir based tannin natural dye

Abstract

<jats:p>The resurgence of natural dyes is gaining fame in textile industry due to eco-friendly nature. The present study was done to investigate the Coconut coir as natural dye (tannin) for silk dyeing under Microwave (MW) treatment following the optimization of experimental parameters. Isolation of colorant was carried out in aqueous, acidic and organic media (methanol) under influence of MW treatment up to 6 minutes. Dyeing of silk was carried out having irradiated and unirradiated extracts. Good colour strength was achieved by dyeing unirradiated silk using methanolic extract under MW treatment for 4 minutes at 75°C. The optimal dyeing was achieved at 75 minutes at pH 8 while keeping fabric liquor ratio 1:25 having 5 g/100 ml table salt as an electrolyte. For development of shades, salts of Al and Fe and Tannic acid were used as pre- and post-chemical mordants and Acacia, Pomegranate, Turmeric and Henna as pre- and post-biomordents. Acacia (6%) as pre-bio mordant and Turmeric (6%) as post-bio mordant considerably improved the colour strength at optimal conditions utilizing irradiated extract of coconut coir (tannin) and un-irradiated silk under MW treatment at 4 minutes. ISO-standard shows good colour fastness and colour strength at optimal conditions using Acacia and Turmeric as bio-mordents. This research work gives information about tannin extracted from Coconut coir has great potential to dye silk fabric to produce reddish-brown colour under the influence of microwave treatment. FTIR spectral study revealed chemical changes in the silk fabric treated with microwave radiations.</jats:p>

Eco-Friendly Dyeing of Wool with Natural Dye Extracted from Moroccan Crocus sativus L. Flower Waste

“…Thus, several methods of surface modification and optimization of dyeing processes have been developed for the improvement of the dyeability of textile fibers with natural dyes. Among these different technologies, we can find plasma treatment [10], enzyme treatment [11], microwave treatment [12], ultrasound [13], gamma radiation [14], cationization [15], and RSM optimization [16].…”

Environmentally Benign Dyeing of Polyester Fabric with Madder: Modelling by Artificial Neural Network and Fuzzy Logic Optimized by Genetic Algorithm

“…Natural dyes are considered as safer and eco-friendlier substitutes to synthetic dyes and are usually applied on natural protein fibers such as wool and silk [1][2][3][4][5]. Different techniques such as metal-mordanting [6,7], bio-mordanting [8,9], enzyme treatment [10], plasma treatment [11][12][13], chitosan treatment [14,15], ultrasonic radiation [16,17], microwave heating [18,19] have been employed for the improvement of natural dyeing of wool fibers. Metal mordanting is the traditional method which is widely used for increasing the exhaustion and color strength of natural dyes on wool and silk.…”

Eco-Friendly and Community Sustainable Textile Fabric Dyeing Methods From Thai Buffalo Manure: From Pasture to Fashion Designer

“…Moreover, with the ever-growing demand for eco-textiles, natural dyes are gaining attention as an alternative to synthetic dyes (Haji & Naebe, 2020), with natural dyes' resurgence gaining fame within the textile industry due to their eco-friendly nature (Haji & Naebe, 2020;Kiran et al, 2020), their cost-effectiveness, renewability, no disposal problems, and their non-carcinogenic nature (Saha & Datta, 2008). Finally, natural dyes are sustainable, renewable, biodegradable, and anti-allergic from harmful additives (Buyukakinci et al, 2021;Islam et al, 2013;Rehman et al, 2017).…”

“…Some natural dyes are also abundant, easy to access, harmless to one's health, and environmentally friendly. Natural dyes can also be extracted from numerous natural materials such as Citrus aurantium on Lyocell fabric (Tayyab et al, 2020), coconut coir based tannin natural dye (Kiran et al, 2020), oak and barberry dye (Buyukakinci et al, 2021), Juglans regia L. bark (walnut bark) (Haji et al, 2018), henna and yarrow (Haji, 2020), and Ixora coccinea (jungle geranium) or Peltophorum pterocarpum (yellow-flame) (Kumar & Prabha, 2018).…”

“…In addition to the properties of the fiber dyes, other important factors in the natural dyeing process include (1) the mordant concentration (2) dyeing time (3) acidity and alkalinity of the dye ( Dyebath pH ), and (4) dyeing temperature utilizing microwave heating, which is another option to shorten the drying time (Buyukakinci et al, 2021; Haji, 2020; Haji & Naebe, 2020; Kiran et al, 2020).…”