A reverse osmosis membrane, its preparation method and application

By introducing eutectic solvents and covalent organic framework materials into the reverse osmosis membrane, the interfacial polymerization reaction was optimized, solving the problems of short membrane life and easy fouling under acidic conditions. This achieved synergistic performance of high flux and high desalination rate, improved the membrane's antifouling and alkali resistance, and reduced the cost of use.

CN122273345APending Publication Date: 2026-06-26HUNAN KEENSEN TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-01
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing reverse osmosis membranes have a short lifespan under acidic conditions, poor acid and alkali resistance, and are difficult to maintain desalination efficiency while increasing flux. They are also susceptible to fouling, which increases operating costs.

Method used

The interfacial polymerization reaction is controlled by using eutectic solvent (DES) and covalent organic framework materials (COFs) to form a polyamide separation layer, which enhances the membrane's antifouling, alkali resistance, and oxidation resistance, while also optimizing the membrane pore structure.

Benefits of technology

It improves the flux and desalination rate of reverse osmosis membranes, extends membrane lifespan, reduces cleaning frequency and operating energy consumption, and is suitable for large-scale water treatment.

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Abstract

This invention relates to the field of water treatment membrane technology, and more particularly to a reverse osmosis membrane, its preparation method, and its application. The reverse osmosis membrane comprises a nonwoven fabric layer, a support layer, and a polyamide separation layer sequentially laminated together; the polyamide separation layer is formed by an interfacial polymerization reaction of an aqueous phase solution and an oil phase solution on the support layer; the aqueous phase solution comprises amine monomers, a eutectic solvent, and a covalent organic framework material; the oil phase solution comprises acyl chloride monomers. The reverse osmosis membrane provided by this invention exhibits superior antifouling, alkali resistance, and oxidation resistance.
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Citation Information

Patent Citations

  • Preparation method and application of high-permeability polyamide reverse osmosis membrane

    CN121288573A