Study on the Properties of the Nano TiO2/Silk Fibroin Porous Films

摘要

Using the freeze-drying method,the Nano-TiO2/silk fibroin porous films were synthesized using different ratios of TiO2 to silk fibroin solution.Through Scanning electron microscopy (SEM),X-ray diffraction (XRD),Thermogravimetric analysis (TGA),Thermogravimetric analysis (DTG),Tensile strain and Water-solubility tests,the structures and properties of these porous films were characterized.The SEM results indicated that the pores of the Nano-TiO2/silk fibroin porous films distributed uniformly with porosity by freeze-drying.The XRD analysis implied that the formation of Nano-TiO2 particles might induce the conformational transition of silk fibroin from the typical Silk I to the typical Silk II structure partly with the increasing of crystallinity in the porous films.Compared with the pure silk fibroin porous films,mechanical properties of Nano-TiO2/silk fibroin porous films were improved,heat transition temperature was also enhanced,and water-solubility was reduced a lot.