Abstract: A method of preparing reverse osmosis membrane with double network of charged hydrogel and polyamide includes the steps of: (a) preparing an aqueous phase polymer solution containing m-phenylenediamine, polymer monomer with ionic group and crosslinking agent, and an organic phase polymer solution containing trimesoyl chloride and photoinitiator; (b) preparing a reverse osmosis membrane by inducing reaction of the aqueous phase and the organic phase polymer solution under ultraviolet light to form a charged hydrogel layer and a polyamide layer respectively; and (c) cleaning the membrane. The hydrogel layer not only enhances the electrical properties, thereby limiting the dissolution of ions in water on the membrane surface and the diffusion of ions in the membrane, and reducing the ions passing through the membrane, but also improves the hydrophilicity, which is beneficial to the transmission of water molecules within the membrane and the improvement of the anti-fouling performance of the membrane.

Abstract: A method of preparing reverse osmosis membrane with double network of charged hydrogel and polyamide includes the steps of: (a) preparing an aqueous phase polymer solution containing m-phenylenediamine, polymer monomer with ionic group and crosslinking agent, and an organic phase polymer solution containing trimesoyl chloride and photoinitiator; (b) preparing a reverse osmosis membrane by inducing reaction of the aqueous phase and the organic phase polymer solution under ultraviolet light to form a charged hydrogel layer and a polyamide layer respectively; and (c) cleaning the membrane. The hydrogel layer not only enhances the electrical properties, thereby limiting the dissolution of ions in water on the membrane surface and the diffusion of ions in the membrane, and reducing the ions passing through the membrane, but also improves the hydrophilicity, which is beneficial to the transmission of water molecules within the membrane and the improvement of the anti-fouling performance of the membrane.