▎ 摘　　要

NOVELTY - Preparing modified high-flux reverse osmosis membrane based on multidimensional graphene oxide involves weighing 20-90 pts. wt. hydroxyl-containing diamine, adding into dispersion liquid containing 50 pts. wt. graphene oxide, uniformly dispersing, and performing vacuum filtration on polysulfone ultrafiltration membrane; curing assembled membrane at 60℃ for 0-60 minutes, stripping graphene oxide from ultrafiltration membrane, and drying in vacuum at 60℃ to obtain multi-dimensional graphene oxide; adding multidimensional graphene oxide in aqueous phase solution containing 1-3 wt.% m-phenylenediamine and uniformly mixing, where concentration of multidimensional graphene oxide is 25-100 mg/L; pouring aqueous phase solution on surface of fixed polysulfone support membrane, soaking for 1-5 minutes, removing redundant solution on surface of support membrane, then placing membrane in ventilation place for drying in shade. USE - Method for preparing modified high-flux reverse osmosis membrane based on multi-dimensional graphene oxide used in sea water desalination technology. ADVANTAGE - The method helps in improving flux, without losing salt-intercepting performance; improves flux of reverse osmosis composite film; provides channel for water cross-film transmission, accelerate migration of water molecules in film, where film flux is increased. DETAILED DESCRIPTION - Preparing modified high-flux reverse osmosis membrane based on multidimensional graphene oxide involves weighing 20-90 pts. wt. hydroxyl-containing diamine, adding into dispersion liquid containing 50 pts. wt. graphene oxide, uniformly dispersing, and performing vacuum filtration on polysulfone ultrafiltration membrane; curing assembled membrane at 60℃ for 0-60 minutes, stripping graphene oxide from ultrafiltration membrane, and drying in vacuum at 60℃ to obtain multi-dimensional graphene oxide; adding multidimensional graphene oxide in aqueous phase solution containing 1-3 wt.% m-phenylenediamine and uniformly mixing, where concentration of multidimensional graphene oxide is 25-100 mg/L; pouring aqueous phase solution on surface of fixed polysulfone support membrane, soaking for 1-5 minutes, removing redundant solution on surface of support membrane, then placing membrane in ventilation place for drying in shade; pouring 0.1-0.5 wt.% trimesoyl chloride oil phase solution on polysulfone support membrane, contacting for 10-100 seconds, removing redundant solution on surface of membrane, and then placing membrane in ventilation place for drying in shade; heating and curing membrane for 5-20 minutes at 50-100℃, and drying.