Analysis of nano-particle size in fibroin membrane modified by nano TiO_2

In order to further improve the structure of silk fibroin films,a sol-gel process was used to prepare nano TiO2modified silk fibroin membrane. AMF and effective mass approximation model evaluation exhibited that the average particle size of TiO2in fibroin solution and in the modified fibroin membrane: at around 76 nm and 80 nm,respectively; When the mass fraction of TiO2is less than 1.2%,the averagenano-particle size is less than 100 nm; and as the pH is increased,the nano-particle size gets bigger. Researches results show that the sol-gel method is feasible to prepare nano TiO2modified silk fibron membrane,no aggregation occurs with nano-particles,either before or after the membrane formation,and all praticiles are in nano scale.