双官能团活性染料对羊毛纤维染色工艺的探讨

A Study on Dyeing Wool Fibers with Bi-functional Reactive Dyestuffs

采用双官能团活性染料(毛用活性染料和棉用活性染料)对羊毛纤维进行染色,探讨了固色pH值、固色时间和固色温度对染色效果的影响。结果表明:双乙烯砜型棉用活性染料对羊毛纤维的染色过程和染色效果与毛用活性染料相近,在其最佳染色工艺条件下可以代替毛用活性染料。其最佳染色工艺为:pH=3～4,40℃下入染,固色条件为pH=6～7,95℃下保温染色90分钟;双官能团棉用活性染料上染羊毛纤维的过程中,亲核加成反应占主导地位。

Bi-functional reactive dyestuffs were employed in dyeing of wool fiber. The effects of pH, time and temperature in the fixation process on dyeing were studied. The results showed that the process and the effect of bi-vinylsulphone reactive dyes for cotton were similar to those of re- active dyes for wool fiber. It was feasible for bi-viny｜sulphone reactive dyes to take the place of reactive dyes for wool. The optimal dyeing process of bi-vinylsulphone reactive dyes were： starting at pH value 3 -4, temperature d0~C, then fixing at pH value 6 -7, keeping the temperature of 95~C for 90 minutes. The nucleophilic addition reaction is dominant in the dyeing process for bi-functional reactive dyes.