Dyeing Properties and UV Protective Functionalization of Cotton Yarn Dyed with Curcuma aromatica Salisb. Extract

Abstract

This research was conducted to study the dyeing properties of cotton yarn dyed with Curcuma aromatica Salisb. extract using the exhaustion method. The optimum conditions for the extraction and dyeing process were studied. The effect of dye auxiliaries on exhaustion degree, ultraviolet protection factor, color coordinates, color strength, and fastness to washing and light were examined. The results revealed that the optimum conditions for dyeing were dyeing at 70 °C for 60 minutes with a liquor ratio of 1:30. Dyed cotton yarns exhibited yellow-red shade. The application of alum as mordant with the pre-mordanting method tends to give higher color strength. Moreover cotton yarns treated with 1 %w/v of chitosan had better dyeability and showed the highest color strength. The fastness of dyed samples was slightly improved by pre-mordanting with alum and chitosan treatment.  Furthermore, the dyeing of Curcuma aromatica Salisb. extract on chitosan-treated fabrics enhanced the ultraviolet protection properties.