The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 2012
Filed:
Feb. 20, 2006
Shigeharu Takagi, Nishikamo-gun, JP;
Misaki Kobayashi, Nishikamo-gun, JP;
Toshiya Saito, Okazaki, JP;
Masaru Yoshida, Takasaki, JP;
Masaharu Asano, Takasaki, JP;
Tetsuya Yamaki, Takasaki, JP;
Shigeharu Takagi, Nishikamo-gun, JP;
Misaki Kobayashi, Nishikamo-gun, JP;
Toshiya Saito, Okazaki, JP;
Masaru Yoshida, Takasaki, JP;
Masaharu Asano, Takasaki, JP;
Tetsuya Yamaki, Takasaki, JP;
Japan Atomic Energy Agency, Naka-gun, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A functional membrane is provided, which has high functionality combined with the gas barrier performance and mechanical strength inherent in a polymer film substrate. In particular, a polymer electrolyte membrane is provided, which is excellent in terms of high proton conductivity and gas barrier performance and is most appropriate to serve as a polymer electrolyte membrane for fuel cells. A method for producing a functional membrane is provided, which comprises: a step of ion irradiation, in which active species are generated in a polymer film substrate containing nonconductive inorganic particles by irradiating the polymer film substrate with high-energy heavy ions to the extent of 104/cm2 to 1014/cm2; and a step of graft polymerization subsequent to the step of ion irradiation, in which one or more monomers selected from group A consisting of monomers containing useful functional groups are added such that the monomers are graft polymerized with the polymer film substrate.