Value-added simultaneous dyeing and finishing of viscose using natural resources
- 1Dept. of Textile Chemistry, Faculty of Tech. and Engineering, The Maharaja Sayajirao University of Baroda, Vadodara-390 001, Gujarat, India
Res. J. Engineering Sci., Volume 6, Issue (9), Pages 14-22, October,26 (2017)
The extensive utilization of the synthetic dyestuffs for the colouration of various textiles has been disparaged owing to the introduction of contamination into the environment. The application of dyestuffs derived from the natural resources, in textile wet processing for dyeing and printing of textiles, is an environmental-friendly approach for the protection of the biosphere. Today, it is noteworthy that people worldwide have started accepting the fact that natural dyes are the most traditional and hygienic. Vegetable natural dyestuffs are very good for skin and soothing to eyes. In the present work, a natural vegetable dye, extracted from Hibiscus rosa-sinensis flower, has been used for the dyeing of a regenerated cellulosic fibre, viscose rayon. The dyeing has been performed on the fabric pre-mordanted with a tannin-based natural mordant, viz. myrobolan. Padding techniques have been adopted for mordanting and dyeing. The effect of the mordant on the shade, tone, colour strength (K/S) values and various fastness properties has been studied for the natural colour dyed viscose samples. In the modification of the dyeing process, simultaneous finishing treatment was also carried out by addition of the Aloe vera extract to the dyeing liquor and performing simultaneous dyeing and finishing by the same procedures as utilized for dyeing alone. Performance of aloe vera for enrichment of the comfort characteristics of the dyed substrate has been evaluated. The performance of dyeing and finishing operations in the single bath leads to considerable saving of energy, water, labour, time and cost. Moreover, utilization of natural resources for mordanting, dyeing and finishing makes the approach a “Green technological approach”.
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