Hydrophilic high-performance polyvinylidene fluoride/MOFs composite membrane and preparation method thereof

The invention discloses a hydrophilic high-performance polyvinylidene fluoride/MOFs composite membrane and a preparation method thereof.The preparation method comprises the steps that metal ions and organic ligands grow a metal organic framework material (MOFs) on the surface of a polyvinylidene fluoride (PVDF) membrane in a self-assembly mode, the metal ions are arranged on one side of the PVDF membrane modified by a polydopamine solution, the organic ligands are arranged on the other side of the PVDF membrane, and the PVDF membrane is prepared. The organic ligand is diffused to one side of the modified PVDF membrane and is self-assembled with the metal ions to grow the MOFs. According to the prepared polyvinylidene fluoride/MOFs composite membrane, the hydrophilicity of a PVDF membrane is improved by utilizing the characteristics of polydopamine, the hydrophilic effect is more durable after the membrane is pretreated, MOFs grow on the surface of the membrane in a self-assembly manner by utilizing the functi