A monovalent selective anion exchange membrane, its preparation method and application
By forming a dense polymer-modified layer through electrodeposition, chelation reaction, and polymerization reaction, the problems of insufficient ion selectivity and antifouling performance of monovalent selective anion exchange membranes are solved, and the high selectivity and antifouling performance are improved.
CN122298222APending Publication Date: 2026-06-30HEBEI UNIV OF TECH
Patent Information
- Authority / Receiving Office
- CN Β· China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HEBEI UNIV OF TECH
- Filing Date
- 2026-05-19
- Publication Date
- 2026-06-30
AI Technical Summary
Technical Problem
Existing monovalent selective anion exchange membranes have shortcomings in terms of ion selectivity and antifouling performance, especially in terms of low ion selectivity and ineffective antifouling performance.
Method used
A dense polymer-modified layer is formed through electrodeposition, chelation reaction, and polymerization. Active sites are generated by the chelation reaction between the negatively charged layer and the oxidant, thereby regulating the directional polymerization of the polymer, avoiding pore blockage, and enhancing anti-fouling properties.
Benefits of technology
It achieves high ion selectivity and good antifouling performance, weakens the trade-off effect between flux and selectivity, and improves membrane stability and separation performance.
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Figure CN122298222A_ABST
Abstract
This invention relates to a monovalent selective anion exchange membrane, its preparation method, and its application. The preparation method includes the following steps: placing the anion exchange base membrane in an electrodeposition solution for electrodeposition; the electrodeposition solution includes a negatively charged polymer and a neutral salt; then placing it in an oxidant solution for a chelation reaction; and finally placing it in a polymer monomer solution for polymerization to obtain the monovalent selective anion exchange membrane. This invention, through sequential electrodeposition, chelation, and polymerization reactions, utilizes the active sites formed by the chelation reaction between the negatively charged layer and the oxidant to regulate the directional polymerization of the polymer, forming a dense polymer-modified layer. This avoids polymer clogging of the anion exchange base membrane pores, achieving high ion selectivity, effectively weakening the trade-off effect between flux and selectivity of the monovalent selective anion exchange membrane, and exhibiting good antifouling performance.
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Citation Information
Patent Citations
CN108479405A
CN112957924A