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Sulfonated polyether sulphone/poly acrylic acid composite proton exchange membrane and its preparation method

A proton exchange membrane and sulfonated polyarylether technology, which is applied in electrochemical generators, final product manufacturing, sustainable manufacturing/processing, etc., can solve the problem of membrane electrical performance degradation, battery electrical performance degradation, and increased proton conduction resistance, etc. problems, to achieve the effect of mild reaction conditions, wide application range and high conductivity

Inactive Publication Date: 2008-08-13
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

M.Metayer et al published an article on Reactive & Functional Polymers 33(1997) 311-321 to limit the excessive swelling of the membrane by means of chemical crosslinking. The cross-linked film decreases; in addition, cross-linking the polymer will cause uneven distribution of cross-linked points in the cross-linked film
However, heteropoly acid will be lost with water when the battery is in operation, resulting in a decrease in the electrical performance of the battery and affecting the service life of the battery

Method used

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  • Sulfonated polyether sulphone/poly acrylic acid composite proton exchange membrane and its preparation method
  • Sulfonated polyether sulphone/poly acrylic acid composite proton exchange membrane and its preparation method
  • Sulfonated polyether sulphone/poly acrylic acid composite proton exchange membrane and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]First dissolve 0.4 g of SPPESK with a degree of sulfonation of 0.71 in 1.6 ml of NMP solvent, then add 0.8 ml of acrylic acid, BPO and MBA, which account for 5% and 10% of the weight of acrylic acid, respectively, and stir to form a casting solution. Under normal temperature, normal pressure and 50% relative humidity, it is cast on a horizontal glass plate of 7.5×2.5 cm. Put the glass plate in an airtight oven, polymerize and crosslink at 40°C under normal pressure, and dry it for 24h, then carefully scrape the film off with a spatula, and vacuum-dry it to constant weight at 120°C to obtain an interpenetrating polymer SPPESK / PAA composite proton exchange membrane with network structure. The conversion rate of acrylic acid can reach 71.2%, and the resulting film thickness is about 100 μm. The water absorption rate of the film at 30°C is 25.8%, the size of the film does not change after water absorption, and the conductivity is 5.552E-3. Compared with the SPPESK film, the wate...

Embodiment 2

[0037] First dissolve 0.4 g of SPPESK with a degree of sulfonation of 0.71 in 1.6 ml of NMP solvent, then add 0.8 ml of acrylic acid, BPO and MBA, which account for 5% and 2% of the weight of acrylic acid, respectively, and stir to form a casting solution. Under normal temperature, normal pressure and 50% relative humidity, it is cast on a horizontal glass plate of 7.5×2.5 cm. Put the glass plate in an airtight oven, polymerize and crosslink at 90℃ under normal pressure, and dry it for 24h, then carefully scrape off the film with a spatula, and vacuum-dry it to constant weight at 120℃ to obtain an interpenetrating polymer SPPESK / PAA composite proton exchange membrane with network structure. The conversion rate of acrylic acid can reach 95.3%, and the resulting film thickness is about 100 μm. The water absorption rate of the film at 90℃ is 59.4%, the size does not change after water absorption, and the electrical conductivity is 1.198E-2. Compared with SPPESK film, the water absorp...

Embodiment 3

[0039] First dissolve 0.4 g of SPPESK with a degree of sulfonation of 0.71 in 0.8 ml of NMP solvent, then add 1.6 ml of acrylic acid, BPO and MBA, which account for 5% and 2% of the weight of acrylic acid, respectively, and stir to form a casting solution. Under normal temperature, normal pressure and 50% relative humidity, it is cast on a horizontal glass plate of 7.5×2.5 cm. Put the glass plate in an airtight oven, polymerize and cross-link under normal pressure and 60℃, and dry for 24h, then carefully scrape off the film with a spatula, and vacuum dry it to constant weight at 120℃ to obtain an interpenetrating polymer SPPESK / PAA composite proton exchange membrane with network structure. The conversion rate of acrylic acid was 91.5%, and the resulting film thickness was about 100 μm. The water absorption rate of the membrane at 30°C is 60.5%, the size does not change after water absorption, and the conductivity is 1.882E-2, which is 1.2 times that of Nafion 112 membrane (under t...

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Abstract

The present invention provides a sulfonated polyarylethersulfoneketone / polyacrylic acid composite proton-exchange membrane for fuel cell and its preparation method. Said method includes the following steps: dissolving sulfonated polyarylethersulfoneketone in organic solvent, then adding acrylic acid, initiating agent and crass-linking agent to form membrane-casting solution, membrane-coating by using solution casting process, heating to make the acrylic acid be in-situ polymerized and cross-linked so as to form the invented proton-exchange membrane with interpenetrating polymer network structure.

Description

Technical field [0001] The invention relates to a composite proton exchange membrane with an interpenetrating polymer network structure for a fuel cell and a preparation method thereof. Background technique [0002] The fuel cell is an efficient and clean chemical power source, and the proton exchange membrane is one of the key technologies that determine the performance of the fuel cell. The Nafion series of perfluorosulfonic acid proton exchange membranes produced by DuPont have high proton conductivity and chemical stability, and are widely used in fuel cells. But its lower water absorption capacity (34%), expensive price (800$ / m 2 ), limiting the performance improvement and commercialization of fuel cells. At present, the use of sulfonated aromatic hydrocarbons to prepare proton exchange membranes has become one of the research hotspots. However, sulfonic acid type proton exchange membranes have some shortcomings when they are used. The main manifestation is that the relation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/22C08J3/24C08G81/00H01M8/10H01M2/16H01M8/1039H01M8/1072
CPCY02E60/521Y02E60/12Y02P70/50Y02E60/50
Inventor 吴雪梅贺高红高琳顾爽胡正文蹇锡高姚平径
Owner DALIAN UNIV OF TECH
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