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:
Dec. 11, 2012
Filed:
Feb. 23, 2006
Shigeharu Takagi, Aichi, JP;
Toshiya Saito, Susono, JP;
Misaki Kobayashi, Aichi, JP;
Masaru Yoshida, Takasaki, JP;
Tetsuya Yamaki, Takasaki, JP;
Masaharu Asano, Takasaki, JP;
Shigeharu Takagi, Aichi, JP;
Toshiya Saito, Susono, JP;
Misaki Kobayashi, Aichi, JP;
Masaru Yoshida, Takasaki, JP;
Tetsuya Yamaki, Takasaki, JP;
Masaharu Asano, Takasaki, JP;
Japan Atomic Energy Agency, Ibaraki, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A functional membrane and a production method thereof including: an ion irradiation step in which a polymer film substrate is irradiated with high energy heavy ions at 10to 10ions/cm, to generate active species in the film substrate; and a graft polymerization step in which after the ion irradiation step, the film substrate is added with one or more monomers selected from a group A consisting of monomers each having a functional group and 1 to 80 mol % of a monomer including a group B consisting of a crosslinking agent(s) for the group A monomer(s), and the film substrate and the monomer(s) are graft-polymerized. There is obtained a functional membrane having high functionality in conjunction with the gas barrier property intrinsically possessed by a polymer film substrate, in particular, a polymer electrolyte membrane optimal as a polymer electrolyte membrane for use in fuel cells, high in proton conductivity and excellent in gas barrier property.