High-flux polyamide reverse osmosis membrane and preparation method thereof

CN119524644APending Publication Date: 2025-02-28ZHEJIANG UNIV OF TECH
View PDF 5 Cites 2 Cited by

Patent Information

Application Number
CN202411529936.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-30
Publication Date
2025-02-28

AI Technical Summary

Technical Problem

The penetration flux of the existing reverse osmosis membrane is insufficient to meet the actual application needs. At the same time, the post-treatment chemical reagents cause irreversible damage to the polyamide membrane.

Method used

Interface polymerization is coordinated by the coordinated adjustment of water and oil, and interface polymerization occurs between the aqueous solution formed by aromatic polyamines and aliphatic alcohol compounds and the organic solution formed by aromatic polyamide chlorides and phosphate compounds to form an ultra-thin functional layer of polyamide.

Benefits of technology

It achieves the significant improvement of the permeability flux of the reverse osmosis membrane while ensuring high salt retention rate, meeting the practical application needs.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119524644A_ABST
    Figure CN119524644A_ABST
Patent Text Reader

Abstract

The invention discloses a high-flux polyamide reverse osmosis membrane and a preparation method thereof, and relates to a high-flux polyamide reverse osmosis membrane prepared by water-oil two-phase synergistic regulation interfacial polymerization and a preparation method thereof. According to the invention, a polyamide functional layer is formed on a porous polysulfone support membrane through interfacial polymerization between a water phase solution formed by aromatic polyamine and aliphatic alcohol compounds and an organic phase solution formed by aromatic polyacyl chloride and phosphate compounds. The aliphatic alcohol compound adjusts interfacial polymerization by adjusting diffusion of aromatic polyamine to an oil phase; the phosphate ester compound can be associated with the aromatic multi-element acyl chloride monomer, and hydrolysis of acyl chloride functional groups is reduced, so that the aromatic multi-element acyl chloride and the aromatic polyamine fully react.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Preparation method of reverse osmosis membrane for seawater desalination and reverse osmosis membrane prepared by same

    CN116143234A

  • High flux reverse osmosis membrane

    US6162358A

  • Preparation method of composite high-water-flux polyamide reverse-osmosis membrane

    CN104474925A

  • Preparation method for polyamide reverse-osmosis membrane

    CN107413207A

  • Method of producing high permeable composite reverse osmosis membrane

    US5576057A

Cited By

  • Reverse osmosis membrane with high flux and high salt rejection rate as well as preparation method and application of reverse osmosis membrane

    CN120305827A

  • A high-flux, high-salt rejection reverse osmosis membrane and its preparation method and application

    CN120305827B