脱胶工艺对蚕丝溶解及再生丝素蛋白纤维性能的影响

为探究脱胶工艺与蚕丝溶解及纤维成形之间的关系，讨论了脱胶溶液质量分数、脱胶次数对蚕丝脱胶率、蚕丝表面形貌、丝素溶解度以及再生丝素蛋白纤维结构及性能的影响。结果表明：蚕丝脱胶率随 Na2CO3 溶液质量分数与脱胶次数的增加而增加，当 Na2CO3 溶液质量分数为0.1%、脱胶3次时，脱胶丝素纤维表面出现明显劈裂的微原纤结构，纤维的断裂强度下降了27.6%。丝胶的去除程度对丝素溶解及再生丝素纤维的结构有所影响，溶解时间随 Na2CO3 溶液质量分数、脱胶次数的增加而减少，再生丝素蛋白纤维的力学性能随脱胶程度的加深而降低，当 Na2CO3 溶液质量分数为0.05%、脱胶3次时，再生丝素蛋白纤维直径均匀、表面光滑、结构紧密且力学性能较好。

Influence of degumming process on the silk dissolution and properties of regenerated silk fibroin fibers

In order to study the relationship between the degumming process and silk dissolution and fiber formation, the influence of the concentration of degumming solution and degumming times on degumming rate, silk surface morphology and fibroin solubility and the structure and properties of regenerated silk fibroin fiber were investigated. The results indicat that the degumming rate increase with the increase of the concentration of degumming solution and degumming times. When the concentration of Na2 CO3 is 0. 1% and degumming is performed for 3 times, fibrils obviously appear on the surface of degummed silk fiber, with the breaking strength decreasing by 27. 6%. The degree of removal of sericin has an impact on the dissolution process and the structure of regenerated silk fibroin. The dissolving time decreases with the increase of the concentration of degumming solution and degumming times. When the concentration of Na2 CO3 is 0. 05% and degumming is performed for 3 times, the obtained regenerated silk fibroin fiber has smooth surface, compact structure and good mechanical properties.