▎ 摘　　要

NOVELTY - A graphene oxide doped hollow fiber nano-filtration membrane producing method involves encapsulating hollow fiber ultrafiltration membrane as a base membrane into a module shell to form membrane module, ultrasonically mixing graphene oxide, active monomer, acid receiving agent into solvent-A to obtain solution-A, dissolving poly-acyl chloride in solvent-B to obtain solution-B. The membrane module of the hollow fiber ultrafiltration membrane basement cavity is soaked in the solution-A to remove air bubbles. The membrane is removed from the solution-A and dried. USE - Method for producing graphene oxide doped hollow fiber nano-filtration membrane. ADVANTAGE - The method enables producing the graphene oxide doped hollow fiber nano-filtration membrane with good effect for improving membrane surface hydrophilicity of the film flux and anti-pollution aspects, good mechanical strength, strong pollution resistance, salt rejection rate and water flux. DETAILED DESCRIPTION - A graphene oxide doped hollow fiber nano-filtration membrane producing method involves encapsulating hollow fiber ultrafiltration membrane as a base membrane into a module shell to form membrane module, ultrasonically mixing graphene oxide, active monomer, acid receiving agent into solvent-A to obtain solution-A, dissolving poly-acyl chloride in solvent-B to obtain solution-B. The membrane module of the hollow fiber ultrafiltration membrane basement cavity is soaked in the solution-A for 5-20 minutes to remove air bubbles. The membrane is removed from the solution-A and dried. The solution-B is added into the membrane cavity for interface polymerization reaction for 30-60 seconds, followed by removing the solution-B and the film cavity surface after drying, and rinsing the membrane with pure water and drying to obtain the graphene oxide doped hollow fiber nanofiltration membrane, where the active monomer is piperazine, phenylene diamine or lentine, the acid receiving agent is sodium phosphate. sodium hydroxide, sodium carbonate or triethylamine, the solvent-A is pure water and/or ethanol, the poly-acyl chloride is trimesoyl chloride, isophthaloyl chloride or paraphthaloyl chloride, the solvent B is hexane, heptane or dodecane, the concentration of the graphene toxide, active monomer and acid receiving agent respectively in the solution-A is 0.001-0.05 wt.%, 0.1-0.6 wt.% and 0.1-0.5 wt.%, and the concentration of the poly-acyl chloride in the solution-B is 0.2-1.0 wt.%.