Using γ-chloropropyl trimethoxy siloxane as a active agent to prepare the antibacterial nanometer SiO_x

The nanometer SiOx with antibacterial activity was prepared by the process that long-chain high-molecular-weight polyethylenimine(PEI) was grafted on the surface of nanometer SiOx using γ-chloropropyl trimethoxy siloxane as a active agent,and then the PEI was modified by the alkyl halide as high-molecular-weight quaternary ammonium salts.At the same time,the process of preparations was optimized.