中文摘要：

用溶胶凝胶法制备纳米TiO2改性再生蚕丝丝素蛋白膜．该丝素膜机械强度提高，在水中溶失率下降．UV、AFM、SEM测试的结果表明，丝素中纳米TiO2粒径约为80nm，纳米粒子在丝素膜中分布均匀；XRD、FTIR测试结果表明，纳米TiO2的加入，可使改性丝素膜的结晶结构从SilkⅠ向SilkⅡ转化，其结晶度也随之提高；TGA测试表明改性丝素膜的热转变温度比纯丝素膜有所改变．

英文摘要：

With the sol-gel method, the regenerated SF （silk fibroin）/nano-TiO2 composite films were prepared. Compared to the pure silk fibroin films, the mechanical strength of these regenerated SF/nano-TiO2 composite films were increased and the loss percentage of SF/nano-TiO2 composite films in aqueous solution were decreased. By using UV, AFM and SEM, these films were characterized. The experimental results reveal that the diameter of nano- TiO2 particles in films was about 80 nm. The nano-TiO2 particles were well dispersed in the regenerated silk fibroin. It was found that the crystal structure of the composite films changed from typical Silk Ⅰ to typical Silk Ⅱ . Furthermore,the crystallinity of the composite films was obviously improved. Through the TGA, it was demonstrated that the heat transition temperature of composite films was also changed.