【摘要】 采用甲醇水溶液对初生的再生丝素蛋白干法纺丝纤维进行了后处理。研究表明,甲醇处理对再生丝的表面形态、结晶结构及机械性能有影响。甲醇处理前,初生丝蛋白纤维透明而有光泽;甲醇处理后,丝纤维呈现白色,光泽度下降,同时沿纤维轴方向出现了细小的条纹,并可观察到明显的双折射现象。甲醇处理还可使初生丝蛋白纤维中存在的无规卷曲或SilkⅠ结构向SilkⅡ结构转变,并提高初生丝的断裂强度。和脱胶丝相比,处理后的丝纤维模量较高,但断裂伸长率较小,丝纤维的脆性仍较大。更多还原

【Abstract】 The dry spinning fibers of regenerated silk fibroin were treated with methanol aqueous solution.The results showed that methanol treatment affected the morphology,structure and mechanical properties of the regenerated fibers.Before methanol treatment,the as-spun fibers were transparent and glossy;after methanol treatment,the fibers exhibited a white color and showed banded features along the fiber axis,moreover,birefringence of the fibers could be observed obviously.The structure of the as-spun fibers changed from random-coil or silk Ⅰ conformation to silk Ⅱ conformation and the breaking intensity of the as-spun fibers were improved after methanol treatment.Compared with degummed silk fiber,the fibers treated with methanol had higher module,but the breaking elongation was lower,the fibers were still brittle.更多还原