Natural dye extracted from Triadica Sebifera in aqueous medium for sustainable dyeing and functionalizing of viscose fabric

Sustainable dyeing with natural compounds has gained more attention for a wide range of functional properties and environmental benefits. The purpose of this study was to investigate aqueous extraction in an alkaline medium in order to extract natural dyes from the bark of the Chinese tallow tree (Triadica Sebifera) and to determine its dyeing potential on viscose fabric. The perfect conditions for dye extraction were observed at M: L ratio 1:20, temperature 90 °C, pH 10, and time 100 min. Using different mordanting techniques severe dyeing process was done by using FeSO4.7H2O, KAl(SO4)2.12H2O, SnCl2.2H2O, CuSO4.5H2O, ZnSO4.7H2O for viscose fabric. Here, three varied mordanting strategies, pre-mordanting, meta-mordanting, and post-mordanting were applied. The outcome has demonstrated that the dyeing of viscose fabric…