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80 nm,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.
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.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2006年第5期649-653,共5页
Acta Polymerica Sinica
基金
国家自然基金(基金号20573068)
江苏省高校省级重点实验室开放基金(基金号KJS03069)资助项目
