High-pressure reverse osmosis membrane based on pectin-assisted interfacial polymerization and preparation method therefor

A method for preparing a high-pressure reverse osmosis membrane based on pectin-assisted interfacial polymerization, comprising the following steps:

• (1) fixing a polysulfone ultrafiltration membrane to an organic glass frame, and draining off water drops on a surface of the polysulfone ultrafiltration membrane;
• (2) pouring an aqueous solution containing metaphenylenediamine, camphorsulfonic acid, triethylamine and an interfacial polymerization reaction regulator onto the surface of the polysulfone ultrafiltration membrane, and removing a residual aqueous phase solution from the surface of the polysulfone ultrafiltration membrane, after allowing the polysulfone ultrafiltration membrane to stand for a period of time, wherein the interfacial polymerization reaction regulator is pectin, with a mass percent of 0.05-0.3 wt %;
• (3) pouring an organic solution containing trimesoyl chloride onto the surface of the membrane obtained in step (2), and removing a residual organic phase solution from the surface after allowing the polysulfone ultrafiltration membrane to stand for a period of time;
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• (4) allowing the membrane obtained in step (3) to stand, putting the membrane in an air blast drying oven after the residual solution on the surface is naturally volatilized, performing a thermal treatment for a period of time at a specific temperature, and washing the surface of the membrane with deionized water to remove a residue from the surface to obtain the high-pressure reverse osmosis membrane.