Research on Preparation of Nanocomposite Antibacterial Agent

The chitosan/modified nano-TiO2 composited antibacterial was prepared by hydrothermal method in this paper. The effects of reaction time and temperature, different kinds of alkali concentration on the reaction function of chitosan and nano-TiO2 were studied. Anionic surfactants were used for surface modification of nano-TiO2 and the composite reaction conditions of chitosan/modified nano-TiO2 were studied preliminarily. The chitosan/modified nano-TiO2 composite antibacterial was characterized by Fourier transform infrared spectroscopy (FTIR). The results showed that: under the conditions of the hydrothermal reaction (2mol/L NaOH, 120°C, 8h), the hydrogen bonds were formed between nano-TiO2 modified by SDBS and the chitosan molecules The different reaction conditions of nano-TiO2 were characterized by X-ray diffraction (XRD). The results showed that: nano-TiO2 can be fairly good activated under the conditions of the hydrothermal reaction: 1mol/L NaOH, 120°C, 14h.