Preparation method and application of a double cross-linking network anion exchange membrane

By preparing anion exchange membranes with a double cross-linked network structure, the problem of low desalination efficiency of traditional electrodialysis membranes was solved, achieving a highly efficient seawater desalination effect with good mechanical properties and ion transfer capacity.

CN117085518BActive Publication Date: 2026-06-12ZHEJIANG BAICHEN LOW CARBON TECH CO LTD
1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG BAICHEN LOW CARBON TECH CO LTD
Filing Date
2023-06-26
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Traditional electrodialysis membranes cannot achieve high desalination efficiency due to swelling and water migration, thus affecting the seawater desalination effect.

⚗Method used

An anion exchange membrane with a double cross-linked network structure is formed by introducing p-vinylbenzyltrimethylammonium chloride and 1-vinylimidazole in the presence of an initiator to generate a proton-carrying cross-linked polymer material, and then introducing 1,4-dichlorobenzyl for quaternization to form a stable ion exchange structure.

🎯Benefits of technology

It improves the mechanical properties and ion transport capacity of the membrane, enhances its desalination performance, and has a simple preparation process that is easy to industrialize.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

This invention discloses a method for preparing a double-crosslinked network anion exchange membrane and its application. The method for preparing the double-crosslinked network anion exchange membrane includes the following steps: (1) dissolving polyvinylidene fluoride in DFM to obtain a transparent solution A; (2) dissolving p-vinylbenzyltrimethylammonium chloride in solution A to obtain solution B; (3) dissolving 1-vinylimidazolium in solution B to obtain solution C; (4) dissolving benzoyl peroxide in solution C to obtain solution D; (5) heating solution D and then adding 1,4-p-dichlorobenzyl to obtain solution E; (6) heating solution E and then spreading the resulting brown transparent solution onto a clean glass plate and drying it to obtain the double-crosslinked network anion exchange membrane. This invention provides the application of the prepared double-crosslinked network anion exchange membrane in electrodialysis desalination. The preparation process of this invention is simple, achieves good desalination performance of the anion exchange membrane, and improves the stability and mechanical strength of the membrane.
Need to check novelty before this filing date? Find Prior Art