Eco-friendly Dyeing of Viscose Fabric with Reactive Dyes
نویسنده
چکیده
Water-soluble polymers have versatile applications but they are hardly used in wet processing of cellulosic substrates (cotton, viscose, jute, etc.), particularly in dyeing. In this paper, one such water-soluble polymer, polyacrylic acid has been synthesized, characterized and applied to viscose fabric in conjunction with various types of reactive dyes, namely triazinyl, vinyl sulphone, high exhaustion and bi-functional, along with cross-linking agents, namely Glycerol-1,3-dichlorohydrin and hexamethylene tetraminehydroquinone respectively. One of the cross-linking agents (the former one) has been synthesized in the laboratory and characterized. Cross-linking agent is necessary to adhere the dye onto the cellulose macromolecule. Different process sequences have been formulated for dyeing purpose. The dyed samples were assessed by Computer Colour Matching system for colour strength in terms of K/S values and their fastness properties were assessed by standard methods. All such dyeings were compared with conventional dyed samples.
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