Abstract:

In order to reduce environmetal pollution resulted from chemical degumming and improve the spinnability of ramie，the enzymatic-chemical degumming technique of ramie was adopted. The effects of pH，bath ratio，dosage of enzyme，metal ions，temperature and time on degumming of ramie were investigated. The orthogonal test of L9(34) were done by bath ratio，dosage of enzyme，temperature and time. The degumming of ramie with enzyme was done according to optimized technique，followed by chemical refining and rinsing. The results showed that the residual gum of ramie was 14.14% after the first degumming with KDN pectinase(1∶12 of bath ratio，pH= 8.6，1 mmol/L Mg2+，300 IU/g of KDN pectinase，45℃, 4 h)，and the second degumming with TZ-888 composite enzyme(1∶18 of bath ratio，pH= 4.0，1 mmol/L Ca2+， 500 IU/g of TZ-888 compound enzyme，40 ℃，5 h)，and the final residual gum of ramie was 1.79% after chemical refining and rinsing.