季铵化壳聚糖改性棉织物活性无盐染色

Salt-free reactive dyeing of cotton fabric modified with quaternary ammonium chitosan derivative

用季铵化试剂3-氯-2-羟丙基三甲基氯化铵(CTA)对壳聚糖(CTS)进行改性,制备了季铵盐壳聚糖类衍生物2-羟丙基三甲基氯化铵-壳聚糖(CTA-CTS)。优化的改性工艺为:反应时间10 h,反应温度65℃,反应物质量比为:m(氢氧化钠)∶m(壳聚糖)=1∶1,m(CTA)∶m(壳聚糖)=3∶1。CTA-CTS应用于棉织物表面改性,不仅可以实现无盐染色,而且还能在不降低色牢度的情况下改善染色效果。

2-hydroxypropyl trimethylammonium chloride chitosan(CTA-CTS) is prepared by modification of chitosan with 3-chloro-2-hydroxypropyl trimethylammonium chloride(CTA) as a grafting agent.The optimum modification process is: reaction at 65 ℃ for 10 h with m(NaOH)∶m(CTS)=1∶1 and m(CTA)∶m(CTS)=3∶1.Modification of cotton fabric with CTA-CTS can realize salt-free reactive dyeing,and improve dyeing behaviors without sacrificing the color fastness.