Functional membrane and process for production thereof, and electrolyte membrane for fuel cell and process for production thereof

An electrolyte membrane and fuel cell technology, which is applied to fuel cell parts, fuel cells, solid electrolyte fuel cells, etc., can solve the problems of gas barrier performance, insufficient, swelling, etc., and achieve the mentioned gas barrier performance and size The effect of stability

Inactive Publication Date: 2008-02-20
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, for example, Gore Co. and Tokuyama Co., Ltd. have made some attempts to fill porous membranes having three-dimensional continuous pores with extremely high porosity with ion exchange resins; however, some ion exchange resins do not partly participate in cation exchange, resulting in extreme swelling
Furthermore, the porous substrates used are limited to polytetrafluoroethylene and polyethylene which can be made porous, these polymers do not meet the gas barrier properties required for electrolyte membranes used in fuel cells, so it has been found that the solid polymeric The above-mentioned performance of the electrolyte membrane is not enough from the performance required for the fuel cell

Method used

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  • Functional membrane and process for production thereof, and electrolyte membrane for fuel cell and process for production thereof
  • Functional membrane and process for production thereof, and electrolyte membrane for fuel cell and process for production thereof
  • Functional membrane and process for production thereof, and electrolyte membrane for fuel cell and process for production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5， Embodiment 8 and 9

[0091] As the base material (sample film), a polyvinylidene fluoride (hereinafter, abbreviated as PVDF) film was used. The investigated monomers and corresponding compositions are shown in Table 1 provided below.

[0092] The procedure for preparing each sample is as follows.

[0093] (1) The sample film is irradiated with Xe heavy ions or Au heavy ions accelerated by a cyclotron. The ion irradiation density (energy density) is controlled according to the irradiation time.

[0094] (2) The sample was taken out from the irradiation chamber into the air and immersed in the monomer solution shown in Table 1.

[0095] (3) The monomer solution was heated to 60° C. and polymerization was performed for a polymerization time of 24 hours.

[0096] (4) The sample was taken out and immersed in toluene, and the solution was heated to 60° C. to remove the homopolymer.

[0097] (5) Dry the sample in a vacuum drying oven.

[0098] (6) The sample was immersed in a 0.2 mol / l 1,2-dichloroe...

Embodiment 6 and 7

[0102] For the substrate (sample film), a PVDF film was used. The investigated monomers and corresponding compositions are shown in Table 1 provided below.

[0103] (1) The sample film is irradiated with Xe heavy ions or Au heavy ions accelerated by a cyclotron. The ion irradiation density (energy density) was controlled according to the irradiation time (the same as in Examples 1-5).

[0104] (2) The sample was taken out from the irradiation chamber into the air, etched under the alkali treatment conditions shown in Table 1, and then immersed in the monomer solution shown in Table 1 below.

[0105] (3) The monomer solution was heated to 60° C. and polymerization was performed for a polymerization time of 24 hours.

[0106] (4) to (8) are the same as in Examples 1-5.

Embodiment 10

[0108] For the substrate (sample film), a polyvinylidene fluoride (PVDF) film was used, and PVDF was subjected to γ-ray irradiation at the dose shown in Table 1 to prepare crosslinked PVDF. The investigated monomers and corresponding compositions are shown in Table 1 provided below.

[0109] (1) to (8) are the same as in Examples 1-5.

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Abstract

A process for producing a functional membrane comprising an ion irradiation step in which a polymeric film base is irradiated with high-energy heavy ions at a density of 104 to 1014 particles/cm2 to generate active species in the film base; and, subsequent to the ion irradiation step, a graft polymerization step in which at least one monomer selected from the members of group A which are monomers each having a functional group and 1 to 80 mol% (based on the total amount of the monomer(s) of group A) of a monomer selected from the members of group B which are crosslinking agents for the monomers of group A are added to the film base and graft polymerization of the film base and the monomers are then performed; and a functional membrane produced by the process.By employing this process, it becomes possible to produce a functional membrane which combines high functionality with gas-barrier property inherent in a polymeric film base. In particular, a polymeric electrolyte membrane having high proton conductivity and good gas barrier property can be produced, which is highly suitable as a polymeric electrolyte membrane for a fuel cell.

Description

technical field [0001] The present invention relates to a novel functional membrane prepared by using a latent track formed by high-energy heavy ions or by ion beam penetration by high-energy heavy ions and a preparation method thereof, and an electrolyte membrane with excellent gas barrier properties used in fuel cells and its Preparation. [0002] More specifically, the present invention relates to functional membranes suitable for biomimetic bioreactors, biomass conversion reactors obtained by immobilizing enzymes, ion exchange membranes excellent in ion conductivity and ion selectivity, used in secondary batteries and fuel cells The ion exchange membrane, the multi-layer functional membrane and the three-layer membrane, and the selective amino acid separation membrane using electrodialysis, etc., and relate to the preparation method of the above-mentioned functional membrane. [0003] Furthermore, the present invention relates to a method for producing a solid polymer ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/18H01B1/06H01B13/00H01M8/02H01M8/10
CPCC08J7/18H01M8/0291H01M8/1072Y02E60/521H01M8/1039H01M8/1023C08J2327/12C08J5/225H01M8/106H01M8/1088H01M8/0289Y02E60/50Y02P70/50
Inventor 高木繁治斋藤俊哉小林美咲吉田胜八卷彻也浅野雅春
Owner TOYOTA JIDOSHA KK
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