THE PREPARATION AND STUDY ON THE NANO-TiO2/SILK FIBROIN COMPOSITE FILMS BY THE SOL-GEL METHOD

作     者：FENG Xinxing CHEN Jianyong YU Chunhua 

作者机构：The Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education Zhejiang Sci- Tech University Hangzhou 310018 China 

出 版 物：《Chinese Journal of Reactive Polymers》 (中国反应性高分子（英文版）)

年 卷 期：2006年第15卷第1期

页      面：13-22页

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：National Natural Science Foundation of China(Grant No. 50573068) and Zhejiang Natural Science Foundation of China (Grant No. Y405459) 

主　　题：Silk fibroin Nano-TiO2 Crystal form Heat transition Composite. 

摘      要：Based on the sol-gel technique using butyl titanate as oxide precursor, the regenerated SF （silk fibroin）/nano-TiO2 composite films were synthesized. Different amounts of butyl titanate to SF were used to verify this effect on the characteristics of the formed materials. Samples were characterized by thermogravimetric analysis, X-ray diffractometry, UV, AFM and FT-IR spectroscopy. The experimental results reveal that, compared to the pure silk fibroin films, the mechanical strength of these regenerated SF/nano-TiO2 composite films were increased and the dissolubility in water of SF/nano-TiO2 composite films in aqueous solution were decreased. The diameter of nano-TiO2 particle films was about 80nm through UV and AFM. The nano-TiO2 particles were well dispersed in the regenerated silk fibroin. It was found that the crystal structures of the composite films were transited from typical Silk I to typical Silk H by the XRD and FTIR. 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 enhanced.