Conclusions
This paper described the ability to dye cotton/nylon blend fabric in one step, one dyeing bath with shortened time. It was found that the treatment of cotton/nylon fabrics with plasma-nano chitosan enhanced the dye uptake of cotton/nylon fabrics compared with untreated fabric. The improved dye ability of cotton to acid dye is postulated due to the presence of amine groups available from the chitosan. Based on the depth of shade values, it was found that by increasing chitosan nanoparticles concentration up to 0.3% (w/v), there was significant improvement of color strength. Moreover, colorfastness properties to washing and wet crocking of the treated samples were improved at higher chitosan concentration. Union dyeing of cotton/nylon fabrics with acid dyes using biodegradable modification agent such as chitosan is an environmental friendly approach in textile dyeing industry.