A method for preparing carbon nanotube proton exchange membrane by non-solvent induced phase separation

The preparation of carbon nanotube proton exchange membranes by a non-solvent-induced phase separation method solves the problems of long activation time, performance degradation and high cost of traditional proton exchange membranes, and realizes a low-cost, high-performance and environmentally friendly proton exchange membrane.

CN122246172APending Publication Date: 2026-06-19HANGZHOU NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HANGZHOU NORMAL UNIVERSITY
Filing Date
2026-03-27
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Traditional proton exchange membranes have long activation times, their performance degrades at high temperatures, their synthesis routes are complex and costly, and the use of perfluoropolymers leads to environmental pollution.

Method used

A non-solvent-induced phase separation method was adopted, using multi-walled carbon nanotubes and sodium bicarbonate as template agents, and a three-dimensional conductive network membrane with gradient pore structure was constructed by controlling the phase separation process to prepare a carbon nanotube proton exchange membrane.

Benefits of technology

It significantly reduces preparation costs, optimizes electrochemical performance, improves the mechanical stability and proton transport efficiency of the membrane, and is environmentally friendly and highly adaptable.

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Abstract

This invention discloses a method for preparing carbon nanotube proton exchange membranes using solvent-inducible phase separation, belonging to the field of proton exchange membrane technology. The method includes: (1) thoroughly grinding and mixing multi-walled carbon nanotubes and template agent sodium bicarbonate, adding the mixed particles to a toluene solution of a polymer, and stirring to obtain a casting solution; (2) uniformly coating the casting solution onto a carrier, then transferring it to anhydrous ethanol for immersion and phase inversion separation to form a membrane, removing the initial membrane and drying it; (3) immersing the initial membrane dried in step (2) in an acidic solution to remove the template agent, removing it, washing it, and drying it to obtain a carbon nanotube proton exchange membrane. The carbon nanotube proton exchange membrane prepared by this invention has good environmental adaptability and electrochemical performance, low production cost, and the operating current IT and IMP values ​​of the electrochemical system constructed under acidic conditions are superior to those of commercial proton exchange membranes.
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