Composite reverse osmosis membrane with high temperature resistance and high flux as well as preparation method thereof

[0025] To prepare a composite reverse osmosis membrane containing 17% fluorine-containing polyaryl ether ketone and a base membrane doped with 0.02% graphene oxide, the specific steps are as follows:

[0026] A. Prepare trifluoromethyl polyaryl ether ketone, DMF (dimethylformamide), polyvinylpyrrolidone and graphene oxide powder according to the weight ratio of 17:68.98:14:0.02 to form a casting solution, stir evenly, and let stand still Ultrasonic degassing for 10 minutes after 1 hour, as the support layer casting liquid;

[0027] B. Apply the casting liquid prepared in step A to the non-woven fabric with a film scraper with a thickness of 80μm, then evaporate at room temperature for 10s and then immerse in 20℃ deionized water to gel and solidify into a film, and then place it in a 60℃ oven Dry for 6 hours to obtain a support layer;

[0028] C. Separately configure solution A: the solute is m-diphenylamine, the solvent is water, and the concentration is 6%wt; the configuration solutio

[0033] To prepare a composite reverse osmosis membrane containing 18% fluorine-containing polyaryl ether ketone, and the base membrane doped with 0.05% graphene oxide, the specific steps are as follows:

[0034] A. Prepare the fluorine-containing polyaryl ether ketone, DMAc (dimethylacetamide), polyethylene glycol and graphene oxide powder into a casting liquid according to the ratio of 18:69.95:12:0.05, stir it evenly, and let it stand for 1h before ultrasonic Degas for 15 minutes, as the support layer casting liquid; the fluorine-containing polyaryl ether ketone is p-bisphenol and 1,4-bis(4'-fluorobenzoyl)benzene and 1,3-bis(4'-fluorobenzene) Acyl) benzene polymer PPAEK-AF.

[0035] B. Apply the casting liquid prepared in step A to the non-woven fabric with a film scraper with a thickness of 100μm, then evaporate at room temperature for 10s and then immerse in 25℃ deionized water to gel and solidify into a film, and then place it in a 60℃ oven Dry for 5 hours to obtain a support la

[0041] To prepare a composite reverse osmosis membrane containing 19% fluorine-containing polyaryl ether ketone, the base membrane is doped with 0.05% graphene oxide, and the desalination layer is doped with graphene oxide. The specific steps are as follows:

[0042] A. Prepare fluorine-containing polyaryl ether ketone, DMAc (dimethylacetamide), polyethylene glycol and graphene oxide powder into a casting liquid according to the ratio 19:69.98:11:0.05, stir it evenly, and let it stand for 1h before ultrasonic Degas for 15 minutes as a support layer casting solution; among them, the fluorine-containing polyaryl ether ketone is m-bisphenol, 1,4-bis(4'-fluorobenzoyl)benzene and 1,3-bis(4'-fluorobenzene) Acyl) benzene polymer MPAEK-AF.

[0043] B. Apply the casting liquid prepared in step A to the non-woven fabric with a film scraping machine with a thickness of 120μm, then evaporate at room temperature for 10s and then immerse in 20℃ deionized water to gel and solidify into a film, and t