生物酶对羊毛天然染料苏木染色性能的影响

Influences of enzyme on the dyeing performance of wool with natural pigment sappanwood

通过分析苏木染液吸收光谱的变化,比较生物酶改性前后羊毛苏木直接法、后酶染色的K/S值和染色牢度,探讨了羊毛经过蛋白酶和TG酶改性对天然染料苏木染色性能的影响。结果表明:蛋白酶、TG酶使苏木提取液在紫外最大吸收波长向长波方向移动,对应紫外和可见最大吸收波长附近的吸光度增加。与未改性羊毛相比,单独经蛋白酶、TG酶改性和联合改性后的羊毛织物经苏木直接染色和单宁酸、硫酸亚铁、明矾后媒染色的K/S值均增加。经过酶改性的羊毛织物进行苏木直接染色后,具有优良的干摩擦及皂洗毛沾牢度,深色织物皂洗棉沾和皂洗褪色牢度较低。羊毛染色织物经蛋白酶或TG酶处理后,K/S值增加更明显。

By analyzing the absorbance spectrum of sappanwood and comparing the modified wool with non-modified wool in K/S value and fastness after direct dyeing and after-mordant dyeing,the influences of modification with protease and transgluta minase on the dyeing performance of wool with natural pigment sappanwood were studied in this paper.It was shown that protease and transgluta minase made the λmax in UV and absorbances at the λmax in UV /visible increase.Compared to non-modified wool,K/S value of protease and transgluta minase modified wool dyed with sappanwood direct and after-mordant dyeing increase.The fastness to dry rubbing and staining in wool of the modified wool dyed were better,but the fastness to staining in cotton and color fading of the modified wool in deep color were bad.The K/S value of dyed wool increased after modification with protease and transgluta minase.