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A kind of preparation method of proton exchange membrane with hydrophilic/hydrophobic interpenetrating network structure

An interpenetrating network structure, proton exchange membrane technology, applied in the field of proton exchange membrane fuel cell components, can solve the problems of increasing battery weight, complexity and cost, hindering the application of proton exchange polymer membranes, and decreasing proton conductivity. Good thermodynamic stability, promoting compatibility, low cost effect

Active Publication Date: 2019-05-28
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, a major problem with the Nafion membrane is that when the operating temperature exceeds 80°C, the water in the membrane will be dehydrated due to the accelerated evaporation rate, resulting in an increase in the membrane resistance and a sharp drop in the proton conductivity. Applications of Proton Exchange Polymer Membranes
For this reason, in the prior art, a complex pure water humidification auxiliary system is used to humidify the fuel gas and oxidant to humidify the proton exchange membrane, which on the one hand leads to an increase in battery weight, complexity and cost, and fails to Fundamentally solve the problem of battery performance degradation when it exceeds 80°C

Method used

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  • A kind of preparation method of proton exchange membrane with hydrophilic/hydrophobic interpenetrating network structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Dissolve 3.88g of 11-bromo-1-undecanol in dissolved anhydrous tetrahydrofuran, add 1.60g of triethylamine to it under an ice-water bath and mix thoroughly, then, under the protection of nitrogen, add Add 1.49g of methacryloyl chloride dropwise, and react at room temperature (25°C) for 48 hours; remove the solvent, extract the product with dichloromethane, wash with water, dry, and elute with a volume ratio of petroleum ether and acetone of 1:1 Neutral alumina (Al 2 o 3 ) column to collect the first product;

[0019] (2) Under the protection of nitrogen, mix 3.28g of the first product collected in step (1) with 0.92g of 1-methylimidazole, react at 40°C for 48 hours, purify the product by diethyl ether precipitation, and obtain after drying The ionic liquid auxiliary agent required by this scheme is 3.23g, and the chemical structural formula is

[0020] Will 1.50g, 1.40g, the above 2.00g, Mix 0.30g and 0.05g of benzoin ethyl ether evenly, apply it on the ...

Embodiment 2

[0023] The preparation method of ionic liquid additive refers to Example 1;

[0024] Will 1.00g, 1.40g, 2.30g, Mix 0.40g and 0.05g of benzoin ethyl ether evenly, apply it on the mold, irradiate with ultraviolet light for 30min, and polymerize in situ to form a film.

[0025] The electrical conductivity of the proton exchange membrane obtained in this example reaches 1.01×10 at 150°C -2 S cm -1 .

Embodiment 3

[0027] The preparation method of ionic liquid additive refers to Example 1;

[0028] Will 0.90g, 1.10g, 2.50g, Mix 0.50g and 0.06g of azobisisobutyronitrile evenly, apply on the mold, and polymerize at 75°C for 6 hours to form a film.

[0029] The electrical conductivity of the proton exchange membrane obtained in this example reaches 1.13×10 at 150°C -2 S cm -1 .

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Abstract

The invention belongs to the technical field of proton exchange membrane fuel cell parts, and particularly relates to a preparation method of a proton exchange membrane with a hydrophilic / hydrophobic interpenetrating network structure. The preparation method comprises the following steps of uniformly mixing hydrophilic proton ion liquid, hydrophobic ion liquid, an ion liquid additive and an ion liquid crosslinking agent, and preparing into micro-emulsion; polymerizing the micro-emulsion, so as to obtain the proton exchange membrane. By adopting the scheme, the preparation method has the advantages that the compatibility of the hydrophilic proton ion liquid and the hydrophobic ion liquid is promoted, all reaction matters respectively attend the polymerizing reaction, the free separation of micromolecules out of a polymer film is avoided, the ion conduction function after film forming is promoted, and the conductivity of the proton exchange membrane is improved.

Description

technical field [0001] The invention belongs to the technical field of proton exchange membrane fuel cell components, in particular to a method for preparing a proton exchange membrane with a hydrophilic / hydrophobic interpenetrating network structure. Background technique [0002] Proton exchange membrane is a key component of proton exchange membrane fuel cell, which plays a dual role of conducting protons and blocking fuel, and its performance directly affects the service performance and life of the fuel cell. At present, the most widely used proton exchange membrane is perfluorosulfonic acid membrane represented by Nafion membrane. Nafion membrane has excellent chemical stability and high electrical conductivity. [0003] However, a major problem with the Nafion membrane is that when the operating temperature exceeds 80°C, the water in the membrane will be dehydrated due to the accelerated evaporation rate, resulting in an increase in the membrane resistance and a sharp d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1072H01M8/1067
CPCH01M8/1067H01M8/1072H01M2008/1095Y02E60/50
Inventor 林本才袁文森徐斐祝缓缓袁宁一丁建宁
Owner CHANGZHOU UNIV
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