纳米TiO2改性丝素复合膜的研究

为了进一步改善丝素蛋白膜的结构性能,用溶胶凝胶法制备了不同比例纳米TiO_2改性的丝素蛋白复合膜。对生成的纳米粒子进行粒径分析表明,成膜前后纳米粒径约为80nm左右。对丝素膜的结构和热性能用X射线衍射(XRD)、扫描电镜(SEM)、热重分析(TGA和DTG)进行表征：XRD测试结果表明,随着纳米TiO_2的加入,复合丝素膜的结晶结构从SilkⅠ向SilkⅡ转化；SEM测试结果表明,TiO_2能与丝素形成较好的键合；TGA和DTG测试表明,复合丝素膜的热转变温度较之于纯丝素膜有所提高。

Characteristics of Nano-TiO2 Modified Silk Fibroin Composite Films With Sol-Gel Method

With the sol-gel method,the regenerated SF(silk fibroin)/nano-TiO_2 composite films were synthe- sized using various ratios of SF and TiO_2.The experimental results revealed that the nano-TiO_2 particles were well dispersed in the regenerated silk fibroin.The diameter of nano-TiO_2 particles was about 80nm.Through XRD,SEM,TGA and DTG,the structures of these films were characterized.The XRD measurement indicated that the crystal structures of the composite films were transited from typical SilkⅠto typical SilkⅡ.Through TGA and DTG,it was demonstrated that the heat transition temperature of composite films was also en- hanced.