▎ 摘　　要

NOVELTY - A chlorine-resistant and pollution-resistant reverse osmosis membrane preparing method involves esterifying delicate short cotton linter and hydrolyzing in a reaction kettle to obtain cellulose acetate, and preparing a cellulose acetate dispersion by dispersing cellulose acetate in water, adding the aqueous phase solution and organic phase to a container, adding a reaction additive and stirring the mixture, using a non-woven fabric as a base layer, forming a polysulfone layer on the surface of the nonwoven, immersing a nonwoven fabric in the cellulose acetate dispersion. The nonwoven fabric is immersed to cellulose acetate dispersion, taken out and dried. The nonwoven fabric is immersed in the interface polymerization liquid, taken out, rinsed and dried, grafted a synthetic bis-decylated polyvinylamine onto one side surface of the reverse osmosis membrane, grafted graphene oxide nanosheets, nano gold and polyethylene glycol onto the other side surface of the reverse osmosis membrane. USE - Method for preparing chlorine-resistant and pollution-resistant reverse osmosis membrane. ADVANTAGE - The method enables preparing chlorine-resistant and pollution-resistant reverse osmosis membrane with better chlorine resistance and pollution resistance, prolonged the washing period of the reverse osmosis membrane and reduced labor intensity of people. DETAILED DESCRIPTION - A chlorine-resistant and pollution-resistant reverse osmosis membrane preparing method involves esterifying 400-600 grams of delicate short cotton linter and hydrolyzing in a reaction kettle to obtain 300-400 grams of cellulose acetate, and preparing a cellulose acetate dispersion by dispersing cellulose acetate in 14900-15100 ml water, adding the aqueous phase solution and the organic phase sequentially to a container, adding a reaction additive, and stirring the mixture is uniformly at room temperature for 30-50 minutes, using a non-woven fabric having a thickness of 115-125 micrometer as a base layer of a reverse osmosis membrane, forming a polysulfone layer having a sponge structure of 20-40 micrometers on the surface of the nonwoven fabric by a precipitation transfer method, immersing a nonwoven fabric in the cellulose acetate dispersion for 5-8 hours. The nonwoven fabric is immersed to a depth of 1/3-1/2 of the cellulose acetate dispersion, taken out and dried naturally to ensure the non-woven material solution drops. The nonwoven fabric is immersed in the interface polymerization liquid for 10-30 minutes, taken out, rinsed with water for 10-15 seconds, and dried naturally, grafted a synthetic bis-decylated polyvinylamine onto one side surface of the reverse osmosis membrane by secondary interfacial polymerization method, grafted graphene oxide nanosheets, nano gold and polyethylene glycol onto the other side surface of the reverse osmosis membrane.