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Crosslinked proton exchange membrane with specific oriented structure and preparation method thereof

A proton exchange membrane and cross-linked technology, which is applied to the cross-linked proton exchange membrane with a specific orientation structure and the field of its preparation, can solve the problems of reducing the proton conductivity of the composite membrane, prone to phase separation, etc., and increase the size Effects of stability, low methanol permeability, high proton conductivity

Inactive Publication Date: 2012-09-12
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also some problems at the same time. For example, phase separation is easy to occur between different components of the blended membrane during blending modification; doping with inorganic nanoparticles can improve the water retention performance of the membrane, change the size and length of the material transport channel, and block methanol molecules. Permeate in the membrane, but the addition of inorganic particles tends to reduce the proton conductivity of the composite membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of cross-linked sulfonated polyethersulfone proton exchange membrane with specific orientation structure

[0024] Dissolve the sulfonated polyethersulfone resin with a sulfonation degree of 70% in NMP to make a 5% solution; pour the solution into a petri dish, then place it in an oven at 70°C for 15 hours to dry, and control the residual solvent to 10%, after forming, the film is lifted from the surface of the petri dish; the prepared film is simultaneously stretched in two directions perpendicular to each other at room temperature, the stretch ratio is 2, and the external force is maintained after the stretching is completed to keep the film In the stretched state, a stretched film was obtained; the stretched film was placed in an oven at 70°C for 6 hours, and then dried in a vacuum oven at the same temperature for 6 hours to completely remove the residual solvent; the prepared film was dried at 160 Thermal cross-linking was carried out in a vacuum oven at ...

Embodiment 2

[0027] Preparation of Crosslinked Sulfonated Polyphenylene Ether Proton Exchange Membrane with Specific Orientation Structure

[0028] Dissolve the sulfonated polyphenylene ether resin with a sulfonation degree of 80% in DMAc to prepare a 9% solution; pour the solution into a petri dish, then place it in an oven at 80°C for 9 hours to dry, and control the residual solvent to 20%, after forming, the film is lifted from the surface of the petri dish; the prepared film is simultaneously stretched in two directions perpendicular to each other at room temperature, the stretch ratio is 4, and the external force is maintained after the stretching is completed to keep the film In the stretched state, a stretched film was obtained; the stretched film was placed in an oven at 80°C to continue drying for 8 hours, and then dried in a vacuum oven at the same temperature for 8 hours to completely remove the residual solvent; the prepared film was dried at 180 Thermal cross-linking was carri...

Embodiment 3

[0031] Preparation of cross-linked sulfonated polyphosphazene proton exchange membrane with specific orientation structure

[0032]Dissolve the sulfonated polyphosphazene resin with a sulfonation degree of 85% in DMF to form an 11% solution; pour the solution into a petri dish, and then place it in an oven at 90°C to dry for 18 hours, and control the residual amount of solvent to After forming, lift the film from the surface of the petri dish; stretch the prepared film in a certain direction at room temperature with a stretch ratio of 5, and maintain the external force to keep the film in a stretched state after stretching , to obtain a stretched film; place the stretched film in a 90°C oven to continue drying for 10 hours, and then dry it in a vacuum oven at the same temperature for 10 hours to completely remove the residual solvent; place the prepared film in a vacuum oven at 200°C heat cross-linking in a medium temperature for 4 hours, then naturally cool at room temperatur...

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Abstract

The invention discloses a crosslinked proton exchange membrane with a specific oriented structure and a preparation method thereof, which belong to the field of fuel cell polymer electrolyte materials. The crosslinked proton exchange membrane consists of an ion exchange resin containing a sulfonic acid group, wherein the ion exchange resin containing the sulfonic acid group is a sulfonated non-fluorohydrocarbon polymer with a proton exchange function. The preparation method comprises the following steps of: dissolving the ion exchange resin containing the sulfonic acid group into a solvent to prepare a solution; performing curtain coating and membrane forming; stretching the prepared membrane under the condition that the solvent is not removed completely; after stretching is completed, maintaining external force to keep the membrane in a stretching state; drying the stretched membrane to remove residual solvent; performing heat cross-linking in a vacuum drying oven; cooling at the room temperature; and removing external force. The membrane material has high proton conductivity and low methanol permeability, and can be taken as a polymer electrolyte material for being directly applied to methanol fuel cells.

Description

technical field [0001] The invention relates to a cross-linked proton exchange membrane with a specific orientation structure and a preparation method thereof, which belongs to the field of fuel cell polymer electrolyte materials. The membrane material of the invention can be applied to direct methanol fuel cells. Background technique [0002] The proton exchange membrane (PEM) is one of the key components of the direct methanol fuel cell (DMFC). Sexual functional polymer film. Perfluorosulfonic acid proton exchange membrane is currently the only proton exchange membrane widely used in PEMFC. The most representative one is the Nafion membrane developed by DuPont in the United States in the late 1960s; since then, several other membranes have emerged. Similar proton exchange membranes: Dow membrane from Dow Company in the United States, Aciplex membrane from Asahi Chemical Company in Japan and Flemion membrane from Asahi Glass Company. However, perfluorosulfonic acid proton...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L81/06C08L71/12C08L85/02C08L79/08C08L61/16C08J5/22C08J3/24H01M8/10H01M8/1011H01M8/1018H01M8/1069
CPCY02E60/50
Inventor 林俊钱红雪何少剑刘鑫蔡明威
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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