The invention relates to a preparation method of a
polymer separation membrane with antibacterial and anti-
biological pollution properties for widely applying into
water treatment, and belongs to the field of
water treatment science and technique. A modifying method comprises the following steps of soaking the
polymer separation membrane into a
polyphenol compound solution, and forming a layer of
polyphenol compound on the surface thereof; soaking the separation membrane into a
silicon source solution, and growing a nanometer
silicon dioxide carrier on the surface of the polymerizing
isolation membrane in situ through the silicification action; crosslinking and
coupling the nanometer
silicon dioxide carrier on the surface of the membrane and a
quaternary ammonium salt solution, so as to obtain the
polymer separation membrane with antibacterial and anti-
biological pollution properties. The modified polymer separation membrane has the advantages that the antibacterial ability and anti-
pollution ability are obviously improved, the obvious inhibiting function on the propagation of
bacteria and microorganisms is realized, and the service life of the membrane is prolonged; the chemical method is used for modifying, the reaction is uniform, the technology is simple, the operation is easy, the high-cost instrument is not needed, and the popularizing is easy; the modifying layer of the prepared
quaternary ammonium salt modified polymer separation membrane is firm, the antibacterial ability and anti-
pollution ability are good, and the potential wide application value is realized in the field of
water treatment.