Abstract
The purpose of this study was investigate the dyeing property on chitosan crosslinked cotton fabric with cochineal at variable conditions. Chitosan crosslinked cotton fabrics were manufactured by crosslinking agent epichlorohydrin in the presence of chitosan. Chitosan crosslinked cotton fabrics dyed using cochineal were post-mordanted using Al, Fe and Cu. The dyeability(K/S) of chitosan crosslinked cotton fabrics were measured by computer color matching. Additionally the fastness to washing and light were also investigated. The dye-uptake of chitosan crosslinked cotton fabrics increased with the dyeing time. The saturated dyeing time was about 20minutes at <TEX>$60^{\circ}C$</TEX>. The dyeability(K/S) was remarkably increased with increasing content of crosslinked chitosan because of having a amine group of chitosan. Chitosan crosslinked cotton fabrics were dyed yellowish red by non and Fe mordanting, blueish red by Al and Cu mordanting, respectively. The washing and light fastness were increased by mordanting, especially Cu and Fe mordanting.
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