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Polytetrafluoroethylene diaphragm for preparing hydrogen for fuel cell, and preparation method thereof

A polytetrafluoroethylene, fuel cell technology, applied in the direction of organic diaphragm, electrolysis process, electrolysis components, etc., can solve the problems of poor mechanical properties, poor hydrophilicity, low conductivity, etc., to achieve good mechanical properties, easy compounding, The effect of improving hydrophilicity

Inactive Publication Date: 2020-06-16
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, non-asbestos diaphragm materials widely used for hydrogen production by electrolysis of water have problems such as poor hydrophilicity, low electrical conductivity, and poor mechanical properties, which limit their application in industrial production. The present invention proposes A polytetrafluoroethylene diaphragm and preparation method for preparing hydrogen for fuel cells, which can effectively solve the above-mentioned technical problems

Method used

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  • Polytetrafluoroethylene diaphragm for preparing hydrogen for fuel cell, and preparation method thereof
  • Polytetrafluoroethylene diaphragm for preparing hydrogen for fuel cell, and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] (1) The polytetrafluoroethylene microporous membrane is prepared by bidirectional melt stretching, and then placed in a sodium naphthalene tetrahydrofuran solution, and part of the fluorine atoms on the surface of polytetrafluoroethylene are detached by reaction, exposing the carbon-based surface and polar groups After black spots appear on the surface of the membrane material, the membrane material is taken out, washed 3 to 5 times with deionized water, and dried to obtain an activated polytetrafluoroethylene microporous membrane; the stretching ratio of the polytetrafluoroethylene microporous membrane is 3.5 times; the mass concentration of sodium naphthalene tetrahydrofuran solution is 40%; the temperature of reaction is 60 ℃, and the time is 50min;

[0032] (2) Blend the activated polytetrafluoroethylene microporous membrane prepared in step (1) with methylvinyloxyethyltrimethylammonium chloride in an organic solvent, add additives, seal, and use Co 60 Carry out irr...

Embodiment 2

[0035] (1) The polytetrafluoroethylene microporous membrane is prepared by bidirectional melt stretching, and then placed in a sodium naphthalene tetrahydrofuran solution, and part of the fluorine atoms on the surface of polytetrafluoroethylene are detached by reaction, exposing the carbon-based surface and polar groups After black spots appear on the surface of the membrane material, the membrane material is taken out, washed 3 to 5 times with deionized water, and dried to obtain an activated polytetrafluoroethylene microporous membrane; the stretching ratio of the polytetrafluoroethylene microporous membrane is 3 times; the mass concentration of sodium naphthalene tetrahydrofuran solution is 50%; the temperature of reaction is 50 ℃, and the time is 70min;

[0036] (2) Blend the activated polytetrafluoroethylene microporous membrane prepared in step (1) with methylvinyloxyethyltrimethylammonium chloride in an organic solvent, add additives, seal, and use Co 60 Carry out irrad...

Embodiment 3

[0039] (1) The polytetrafluoroethylene microporous membrane is prepared by bidirectional melt stretching, and then placed in a sodium naphthalene tetrahydrofuran solution, and part of the fluorine atoms on the surface of polytetrafluoroethylene are detached by reaction, exposing the carbon-based surface and polar groups After black spots appear on the surface of the membrane material, the membrane material is taken out, washed 3 to 5 times with deionized water, and dried to obtain an activated polytetrafluoroethylene microporous membrane; the stretching ratio of the polytetrafluoroethylene microporous membrane is 3.5 times; the mass concentration of sodium naphthalene tetrahydrofuran solution is 45%; the temperature of reaction is 55 ℃, and the time is 60min;

[0040] (2) Blend the activated polytetrafluoroethylene microporous membrane prepared in step (1) with methylvinyloxyethyltrimethylammonium chloride in an organic solvent, add additives, seal, and use Co 60 Carry out irr...

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Abstract

The invention relates to the field of fuel cells, and discloses a polytetrafluoroethylene diaphragm for preparing hydrogen for a fuel cell, and a preparation method thereof. The preparation method comprises the following steps: (1) putting a polytetrafluoroethylene microporous membrane into a sodium naphthalene tetrahydrofuran solution, and reacting to obtain an activated polytetrafluoroethylene microporous membrane; and (2) blending the polytetrafluoroethylene microporous membrane and methyl vinyl acyloxyethyl trimethyl ammonium chloride in an organic solvent, adding an auxiliary agent, irradiating by using Co<60>, taking out the membrane material, washing, and drying to obtain the polytetrafluoroethylene membrane for preparing hydrogen for the fuel cell. Compared with a common polytetrafluoroethylene diaphragm, the polytetrafluoroethylene diaphragm prepared by the preparation method disclosed by the invention has the advantages that the conductivity of the prepared polytetrafluoroethylene diaphragm is remarkably improved by grafting quaternary amine groups to the micropores and the surface of PTFE, hydrophilic modification is realized by adding sodium naphthalene tetrahydrofuran,and the polytetrafluoroethylene diaphragm has good mechanical properties.

Description

technical field [0001] The invention relates to the field of fuel cells, and discloses a polytetrafluoroethylene diaphragm for preparing hydrogen for fuel cells and a preparation method. Background technique [0002] Energy is an important material basis for developing the national economy and improving people's quality of life, an important constraint that directly affects economic development, and one of the foundations for national strategic security. In recent years, the demand for energy in human society is increasing, and the traditional energy structure and the consumption of a large amount of energy pose a threat to the living environment of human society. Therefore, the development of clean, efficient and sustainable new energy power technology has been It has become a very urgent task, and hydrogen energy, as an efficient, clean and ideal secondary energy source, has received extensive attention from all over the world. [0003] Large-scale and low-cost production...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08J7/18C08L27/18C25B13/08C25B1/04
CPCC08J7/12C08J7/18C08J2327/18C25B1/04C25B13/08Y02E60/36
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD
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