糜蛋白酶预处理羊毛的低温染色性能

Low Temperature Dyeing Properties of Wool Pretreated by Chymotrypsin

用正交试验法研究了糜蛋白酶对羊毛纤维的预处理情况,再用染料酸性大红BS在较低温度下对预处理后的羊毛进行染色,测定了羊毛的上染率、表观色深值、断裂强力等性能。实验结果表明:在糜蛋白酶用量为2%(owf)、pH值为7、温度为40℃、时间为60 min的预处理条件下,酸性大红BS在80℃下染羊毛的上染率达到95.1%,色深值(K/S)达到15.05,强力下降率只有5.78%,与常规染色工艺条件下的染色性能相比,上染率和色深值均有提高,而纤维强力损失较小。

The pretreatment of wool fibers with chymotrypsin was researched, then the pretreated wool was dyed with acid scarlet BS in low temperature dyeing process, the dye uptake, K/S value and breaking strength of dyeing wool were determined. The re- sults of experiment expressed that, in the pretreatment conditions of 2% （owf） chymotrypsin, pH = 7, 40℃ and 60min, the wool was dyed with acid scarlet BS at 80 ℃ to get 95.1% of dye uptake, 15.05 of K/S, 5.78% lose of breaking strength. Compared with Conventional process, both of the dye uptake and K/S value had increased while the lose of breaking strength was less.