▎ 摘　　要

NOVELTY - Preparation method of polyvinylidene fluoridemembrane modified by polydopamine synergistic nanoparticles, which involves: i. preparation of inorganic nanoparticles; ii. preparing tris(hydroxymethyl)aminomethane solution and dilute acid solution respectively, and mixing tris(hydroxymethyl)aminomethane solution and dilute acid solution evenly to obtain buffer solution; iii. adding inorganic nanoparticles and dopamine into the buffer solution, stirring evenly to obtain a modified solution; iv. solid obtained after drying the modified solution is ground to obtain polydopamine powder doped with nanoparticles; v. dissolving polyvinylidene fluoride and porogen in an organic solvent, stirring uniformly, then adding a set amount of the nanoparticle-doped polydopamine powder, heating and stirring uniformly to obtain a casting liquid; and vi. modified membrane is prepared by using the casting solution. USE - Preparation method of polyvinylidene fluoride membrane modified by polydopamine synergistic nanoparticles used in water purification field. ADVANTAGE - Pure nanoparticles are doped on polydopamine by utilizing the adhesion effect of the polydopamine, and then the polydopamine doped with the nanoparticles is used for modifying the polyvinylidene fluoride (PVDF) membrane, so that the nanoparticles improves the pore structure of the PVDF membrane and improve the pollution resistance and mechanical strength of the PVDF membrane through the hydrophilicity of the surface of the polydopamine modified PVDF membrane, realizing the good hydrophilicity and pollution resistance of the modified PVDF membrane, PVDF modified membrane is adopted to treat sewage, so that membrane pollution and environmental pollution is reduced, water resources are recycled, and the PVDF modified membrane has great significance in achieving carbon neutralization. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for polyvinylidene fluoride membrane modified by polydopamine synergistic nano-particles is prepared by the preparation method.