The invention belongs to the field of composite materials, and relates to a preparation method of a
polyvinylidene fluoride (PVDF) porous coordination composite
ultrafiltration membrane material. The preparation method is characterized in that
transition metal ions are immobilized on a PVDF membrane by using molecules with double amino groups, and the in-situ growth of
porous coordination polymers (PCPs) in an organic ligand solution is realized. The preparation method provided by the invention has the advantages that a new method for preparing the PVDF / PCPs composite
ultrafiltration membrane material by a one-pot method is developed; PVDF and the PCPs are connected through chemical bonds, and the high-stable
ultrafiltration membrane material is formed; by adjusting the types and content of organic ligands and
metal source ions in a precursor solution,
reaction conditions, and the like, the pore structure, growth amount, and the like of the PCPs can be effectively controlled, thereby achieving the directional regulation and control of membrane properties; the PVDF / PCPs ultrafiltration membrane material prepared by the method integrates
porosity and hydrophilicity, the anti-
fouling ability of an ultrafiltration membrane is improved, and the service life is prolonged.