The invention relates to the technology of film separation, and aims to provide an organic-inorganic composite
nanoparticle super-hydrophilic modified
polymer film and a preparation method therefor. The
polymer film contains a super-hydrophilic
polyester modified organic
silicon material, organic-inorganic
composite nanoparticles are uniformly distributed on the cross section, outer
surface layer and inner
surface layer of the
polymer film, and the polymer film is of a gradient micro-nano beaded
network structure; and the super-hydrophilic
polyester modified organic
silicon material contains Si-C bond joint type super-hydrophilic polyether functional group. The polymer film can realize water increment speed difference at different components, and thus the organic-inorganic composite
nanoparticle super-hydrophilic modified polymer film of a gradient pore structure is prepared. The polymer film can realize accurate control for the polymer film pore structure, and meets diversified using environments. The polymer film has the advantages of super
hydrophily, excellent hydrophilic durability, ultra-low pressure or zero over-
film pressure ultrahigh water flux and ultrahigh antipollution performance, and can be widely applied to drinking water deep purification, industrial
sewage treatment, edible drink concentration separation and oil-water separation.