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Proton conducting membrane and production

A technology of proton-conducting membranes and manufacturing methods, which is applied in the field of polymer proton-conducting membranes and their manufacturing methods, and can solve problems such as no breakthrough progress

Active Publication Date: 2008-08-20
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult for organic materials to have this characteristic, and inorganic materials have inherent limitations in film-forming processability. At the same time, inorganic materials with high proton conductivity at room temperature are limited and mostly soluble in water, so this method is applied There is currently no breakthrough in the improvement of PEM

Method used

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  • Proton conducting membrane and production

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Experimental program
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Effect test

Embodiment 1

[0026] Add 20g of p-fluorostyrene (p-fluoro-styrene) monomer (purity 99.8%) into 40g of polyvinyl difluoride resin (PVDF), stir evenly, and carry out grafting reaction with Co-60 radiation irradiation, The irradiation dose was controlled at 25gGy. The obtained PVDF-g-PS-p-F crude product was subjected to Soxhlet extraction with ethyl acetate to remove unreacted monomer and styrene homopolymer. The product was dried at room temperature or heated to obtain a white PVDF-g-PS product, and the weight percentage of the graft was 38.5% by weight. Add PVDF-g-PS-p-F together with 10mg of fluorosurfactant FC-430 in 20ml of 1-methyl-2-pyrrolidone (solid content 3 to 50wt%), and then use the knife coating method under heating (120 ℃) film formation. Afterwards, the membrane was sulfonated with chlorosulfonic acid at 25° C. for 8 hours. The sulfonated membrane was washed successively with THF and water, and then dried under vacuum at 80° C. for 6 hours to obtain the proton conduction me...

Embodiment 2

[0028] Add 20g of meta-fluorostyrene (m-fluoro-styrene) monomer (purity 99.8%) into 40g of polyvinyl difluoride resin (PVDF), stir well, and irradiate with Co-60 to produce grafting reaction , the irradiation dose is controlled at 25gGy. The obtained PVDF-g-PS-m-F crude product was subjected to Soxhlet extraction with ethyl acetate to remove unreacted monomer and styrene homopolymer. The product was dried at room temperature or heated to obtain a white PVDF-g-PS product, and the graft weight percentage was 32.5% by weight. Add PVDF-g-PS-3-F and 10mg of fluorosurfactant FC-430 into 20ml of 1-methyl-2-pyrrolidone (solid content 3 to 50wt%), and then use the doctor blade method under heating (130°C) film formation. Afterwards, the membrane was sulfonated with chlorosulfonic acid at 25°C for 8 hours. The sulfonated membrane was washed successively with tetrahydrofuran and water, and then dried under vacuum at 80°C for 6 hours to obtain the proton conduction membrane of the pres...

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Abstract

A proton conducting membrane and its production are disclosed. The procedure is carried out by grafting monomer containing fluorophenylethylene into polymer membrane material, filming the polymer membrane material, acidifying to substitute cation interchange group on benzene ring containing fluorophenylethylene group. It has lower methanol permeability. It can be used for direct-feeding methanol fuel battery or hydrogen-oxygen battery.

Description

technical field [0001] The invention relates to a proton conduction membrane and its preparation method, in particular to a polymer proton conduction membrane with fluorine-containing cation exchange base as the proton conduction base and its preparation method. Background technique [0002] Direct methanol fuel cell (Direct Methanol Fuel Cell, DMFC) uses methanol-water solution as the fuel of the battery (fuel), through the anode catalyst reaction to generate electrons and protons, electrons enter the external circuit, and protons pass through the proton conduction membrane (proton) exchangemembrane, PEM) to the cathode, combined with oxygen and electrons from the external circuit, and then generate water through a catalytic reaction. [0003] Currently, the biggest problem existing in proton conducting membranes of direct methanol feed fuel cells is that methanol is highly compatible with water and easily forms complexes with protons. Hydrogen ion (proton) is a bare proto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/18C08J5/18H01M4/94H01M8/1023H01M8/1072
CPCY02E60/523Y02E60/50Y02P70/50
Inventor 陈振銮施志哲陈致源
Owner IND TECH RES INST