再生丝素固体的微细结构  

Fine Structure of Regenerated Silk Fibroin Solids

作　　者：李明忠[1] 吴徵宇[1] 箕浦宪彦 严灏景[3] 

机构地区：[1]苏州大学材料工程学院,苏州215021 [2]工业技术院物质工学工业技术研究所,日本茨城3058565 [3]东华大学纺织学院,上海200051

出　　处：《东华大学学报（自然科学版）》2002年第4期28-33,共6页Journal of Donghua University(Natural Science)

基　　金：国家自然科学基金 (批准号 :50 0 730 1 4 );国家 863计划 (课题编号 :2 0 0 1AA32 60 80 )资助项目

摘　　要：研究了蚕丝丝素水溶液经不同方式干燥后 ,所得到的再生丝素固体的微细结构 ,以及存放过程中丝素的结构变化。指出经 3 0℃热风干燥或经高于 -2 0℃冷冻干燥后 ,所得到的丝素固体的结构是无定形和SilkⅠ共存 ,在室内温湿度环境中存放后 ,部分无定形结构转化为SilkⅠ ;蚕丝丝素水溶液经 -80～ -2 0℃冷冻干燥后 ,所得到的丝素膜的结构主要是无定形 ,含少量SilkⅡ ,存放过程中部分无定形结构转化为SilkⅠ ;室温放置所自然形成的丝素凝胶中 ,丝素的结构是无定形和SilkⅡ共存 ;丝素水溶液表面膜中甘氨酸和丙氨酸的含量较高 ,表面膜的结构主要是SilkⅠ和SilkⅡ 。The fibroin solids (membrane and gel) were prepared from regenerated silk fibroin solution in different ways. The structure and structural changes of the fibroin solids during storage were studied. The results indicated that the fibroin membrane air dried at 30℃ or freeze dried above -20℃ was the coexistence of amorphous and silk Ⅰstructure. Part of the amorphous could be transformed into silkⅠstructure under room temperature and humidity. The structure of porous silk fibroin membrane was the coexistence of amorphous and small part of silk Ⅱ, if the aqueous fibroin was freeze dried within the temperature range of -80℃ to -20℃, and the amorphous partly transformed into silk Ⅰ during storage. The structure of fibroin gel naturally forming when kept at room temperature was coexistent of amorphous and silk Ⅱ. The content of Gly and Ala was high in the surface membrane of aqueous fibroin and its structure was mostly silk Ⅰ and silk Ⅱwith high crystallinity.

关 键 词：再生丝素固体 微细结构 结晶 蚕丝丝素 干燥 

分 类 号：TS149[轻工技术与工程—纺织材料与纺织品设计]