▎ 摘　　要

NOVELTY - A metal organic framework modified graphene oxide lamellar composite film preparation method involves dissolving organic ligand and metal salt for preparing metal organic framework in solvent to obtain precursor solution, which is mixed with graphene oxide to obtain metal organic framework-graphene composite nanomaterial by solvothermal method. The nanomaterial is separated by centrifugation, washed, dispersed in the solvent and added polymer to form casting solution, followed by immersing a treated base film in the casting solution, subjecting to pressure-driven filtration, and crosslinking. USE - Method for preparing metal organic framework modified graphene oxide lamellar composite film that is utilized in organic solvent nanofiltration filter. ADVANTAGE - The method enables preparing the composite film with better separation effect, high flux at a relatively low operating pressure and wide application range. DETAILED DESCRIPTION - A metal organic framework modified graphene oxide lamellar composite film preparation method involves dissolving organic ligand and metal salt for preparing metal organic framework in solvent to obtain precursor solution. The precursor solution is mixed with graphene oxide to obtain metal organic framework-graphene composite nanomaterial by solvothermal method. The composite nanomaterial is separated by centrifugation and washed with solvent. The resultant composite nanomaterial is uniformly dispersed in the solvent, added polymer and stirred uniformly to form casting solution, followed by immersing a treated base film in the casting solution and assembling the composite nanomaterial and polymer onto the base film. The film is subjected to pressure-driven filtration to obtain a separation film. The separation film is crosslinked in an oven at 40 degrees C using a crosslinking solution to obtain a finished product. An INDEPENDENT CLAIM is also included for a metal organic framework modified graphene oxide lamellar composite film prepared by the method.