间苯二胺与铜离子配位调节的纳滤膜及其制备方法和应用
The nanofiltration membrane preparation method using the coordination regulation of m-phenylenediamine and copper ions solves the problem of balancing water flux and retention rate in polyamide nanofiltration membranes, achieving high-efficiency separation performance and stable membrane structure, and simplifying the preparation process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ANHUI PUSHI ECOLOGICAL ENVIRONMENT ENG
- Filing Date
- 2026-05-26
- Publication Date
- 2026-07-17
AI Technical Summary
Existing polyamide nanofiltration membranes struggle to balance water flux and ion retention performance, and existing modification methods are complex and lack sufficient stability in copper ion fixation, leading to unstable membrane structures.
A nanofiltration membrane preparation method using coordination regulation of m-phenylenediamine and copper ions was adopted. The polymer support layer was treated with an aqueous solution containing piperazine, and then contacted with an aqueous solution containing m-phenylenediamine and copper ions to form a coordination effect. The membrane was then subjected to interfacial polymerization with polyacrylamide monomers to prepare a stable polyamide selective layer.
This method improves the water flux of nanofiltration membranes while maintaining good divalent ion rejection performance, simplifies the preparation process, and enhances the stability of the membrane structure and separation efficiency.
Smart Images
Figure CN122399591A_ABST