Sustainable ultrasonic dyeing of wool using coconut coir extract

Due to an increasing awareness of the harmful effects of synthetic dyes among the global community, the demand for natural dyes in the textile sector has increased. The current study has been conducted to explore coconut coir, that is, Cocos nucifera, as a new dye yielding plant for wool dyeing under ultrasonic (US) radiation. Unirradiated and US-irradiated extracts of coconut coir were utilized to dye unirradiated and US-irradiated wool fabrics. To make the process more sustainable, acacia, henna, turmeric and pomegranate extracts as biomordants were used to dye wool fabric at 65℃ for 45 min. It was found that a good color yield was achieved by dyeing US-treated wool with US-treated acidic methanolic extract at 65℃ for 45 min. It is found that biomordanting profoundly added value in coloration and also enhanced the fastness rating of the dyed wool fabrics. It is concluded that US rays have excellent efficacy for exploring the coloring wealth of plants for dyeing of natural fabrics.