Preparation and Antibacterial Property of Quaternary Ammonium PVDF Blend Membranes

This article used the silane coupling agents as the activator and grafted the PEI on the surface of the PVDF/CA blend membrane. Moreover, the surface modified by using epihydrin as the tertiary amination reagent and benzyl chloride as the quaternary reagent so as to possess antibacterial ability. The results of SEM characterization and antibacterial property testing indicated that the blend membrane obtained the antibacterial properties after quaternary ammonium PVD/CA blend membrane and the antibacterial rate improved with the increase of immersion time of the antibacterial membrane in bacterium suspension. Antimicrobial rate reached more than 90%.The antibacterial rate of antimicrobial membrane also can reached 80% after pickling.