Polytetrafluoroethylene microporous membrane and preparation method thereof

According to the polytetrafluoroethylene microporous membrane and the preparation method thereof, nano silicon dioxide particles are wrapped in the membrane, the physical performance of the membrane is not affected, meanwhile, rich micropores are formed in the microporous membrane, and the nano particles can be freely diffused to the surface of the membrane from the inside, so that the surface of the membrane is not affected; the polytetrafluoroethylene microporous membrane prepared by the preparation method has excellent sterilization and deodorization functions, and since pores in the microporous membrane are irregular, nanoparticles can be wrapped in the microporous membrane for a long time, so that the polytetrafluoroethylene microporous membrane has lasting sterilization and deodorization functions; the polytetrafluoroethylene microporous membrane with lasting degerming and deodorizing effects can be widely applied to the fields of medical sanitary materials, special garment materials and air purificatio