纳米TiO2／丝素蛋白多孔材料的结构和性能

Structure and Properties of Nano TiO_2/Silk Fibroin Porous Materials

将不同配比的纳米TiO2加入到丝素溶液中，经过冷冻干燥，得到纳米TiO2／丝素蛋白多孔材料。采用扫描电镜（SEM）、X射线衍射（XRD）、红外光谱（FTIR）对材料进行了袁征及溶失率的测试，结果表明：纳米TiO2／丝素多孔材料的内部孔为不规则的多角形，且孔与孔相互贯通，平均孔径为22～68μm，孔隙率为85％～92％；随着纳米TiO2加入量的增大，丝素蛋白的结晶结构从silkⅠ向silkⅡ构象转变，在水中的溶失率明显下降。

The Nano TiO2/silk fibroin porous materials were prepared from the silk fibroin solution added with different ratios of nano TiO2 by freeze-drying method. And it was characterized by using SEM, XRD, FTIR and water-solubility tests, The results showed that the shape of these pores was random polygonal, and one pore was linked to another pore. The average pore diameter was from 22 ～68 μm, and porosity was from 85% ～92%. The crystal of silk fibroin was changed from silk Ⅰ to silk Ⅱ by increasing the concentration of Nano TiO2 in the solution. Furthermore, the dissolubility of silk fibroin reduced significantly in water.