论文部分内容阅读
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 II 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.
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, 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 decreased. The diameter of nano-TiO2 particle films was about 80 nm 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 II by the XRD and FTIR. Futurerther, the crystallinity of the composite films was obviously impr oved.Through the TGA, it was demonstrated that the heat transition temperature of composite films was also enhanced.