木瓜蛋白酶体系改善羊毛织物的防缩性能

Improving shrinkage property of wool by papain treatment

在采用碱性过氧化氢体系进行预处理的基础上,用木瓜蛋白酶、亚硫酸钠、半胱氨酸和维生素C体系在50℃、pH值为7的条件下处理羊毛织物60 min。根据中心合成试验设计方案,改变体系中各组分的用量,进行了31组试验,测定与分析织物白度、黄度、干湿顶破强力的变化率和缩水率。结果表明,该体系可以使织物白度大幅提升50%-120%,黄度减少20%-40%,在干湿强力损失小于5%的情况下,缩水率小于1%。各组分中亚硫酸钠的作用最为显著。通过优化分析,得到各组分的最佳用量：维生素C为0.02%（o.w.f）,半胱氨酸为0.24%（o.w.f）,亚硫酸钠为1.50%（o.w.f）,木瓜蛋白酶为2.02%（o.w.f）。

The papain systems including sodium sulphite, cysteine and vitamin C were used to treat wool fabric for 60 minutes at 50 ℃ and pH 7 after the pretreatment process with alkaline hydrogen peroxide systems. According to the experiments program designed by the central lab, 31 groups of experiments were carried out through varying the amount of the components in the system. Changes of the fabric in whiteness and yellowness, dry and wet burst strength, shrinkage were measured and statistically analyzed; The results showed that the whiteness increases by 50%-120%, yellowness decreases by 20%-40%, and shrinkage is less than 1% when the dry and wet burst strength loss is less than 5 %. Sodium sulphite was the most significant factor in this system. The optimal concentrations of them were Vitamin C 0.02 % （ o. w. f）, Cysteine 0.24 % （ o. w. f）, Na2 SO3 1.50 % （o. w. f）, Papain 2.02 % （o. w. f）, respectively.