Nitto-denko Corporation

Daihatsu Motor Company, Ltd.

Japan Atomic Energy Agency

Hiroshi Koshikawa

Masaharu Asano

Yasunari Maekawa

Tetsuya Yamaki

Hirohisa Tanaka

Yozo Nagai

Satoru Furuyama

Koichiro Asazawa

Junichi Moriyama

Susumu Yamaguchi

Kazuya Yamamoto

Tomohisa Ishizaka

Fumihiro Sanpei

Ikuo Ishibori

Ken-ichi Yoshida

Kimio Yoshimura

Yosuke Yuri

Takahiro Yuyama

Hideyuki Shishitani

Susumu Okumura

The method of the present disclosure is a method for producing a porous polymer film including: irradiating a strip-shaped polymer film with an ion beam while moving the polymer film transversely to the ion beam, so as to form a polymer film that has collided with ions in the beam; and chemically etching the formed polymer film so as to form openings and/or through holes corresponding to tracks left by the colliding ions in the polymer film. The ion beam () with which the polymer film is irradiated is obtained by folding a tail of an original beam () inwardly toward a center of the original beam by nonlinear focusing. The original beam is composed of ions accelerated in a cyclotron and has a cross-sectional intensity distribution profile in which an intensity is maximum at the center of the original beam and continuously decreases from the center toward the tail of the original beam, and the profile is an intensity distribution profile in a cross section perpendicular to a direction of the original beam.

Method for producing porous polymer film and porous polymer film

An anion conducting electrolyte membrane with high performance where the electric conductivity and the water uptake are balanced, and a method of manufacturing the same are disclosed. The anion conducting electrolyte membrane comprises: a polymeric material which consists of fluorine polymer, olefinic polymer, or aromatic polymer; weak base quaternary salt obtained by the reaction of grafts introduced by graft polymerizing vinyl monomer which contains halogenated alkyl groups using radiation and strong organic bases.

Anion conducting electrolyte membrane and manufacturing method thereof

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Gunma, Japan

Hiroshi Koshikawa