Nano silver @ polyvinylidene fluoride antibacterial separation membrane and preparation method

The invention discloses a nano silver @ polyvinylidene fluoride antibacterial separation membrane and a preparation method. The nano silver @ polyvinylidene fluoride antibacterial separation membrane is prepared from polyvinylidene, a pore forming agent, nano silver, inorganic nanoparticles and an organic solvent in a certain proportion. The preparation method comprises the steps that (A) the pore forming agent and the nano material which are weighed are added to the weighed organic solvent for ultrasonic dispersion; (B) the weighed polyvinylidene is added to the organic solvent, and mechanical stirring, standing and defoaming are performed to obtain a casting membrane solution; (C) the casting membrane solution is scraped on a glass plate to form a membrane, the membrane is put into a solidification fluid and is soaked till the membrane sheds, and the membrane is rinsed with distilled water at room temperature and then is put into deionized water to obtain the nano silver @ polyvinylidene fluoride antibacterial separation membrane. Raw material sources are wide, a process is simple, industrial large-scale production is easy to achieve, the antibacterial rate of a PVDF membrane can be improved by the added nano silver by 40% or above, the membrane pollution index is reduced by 90%, the pollution resistance capability of the membrane is remarkably enhanced, and no disinfection by-product is produced in the water treatment application process.