Patents by Inventor Tetsuya Yamaki
Tetsuya Yamaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9708453Abstract: 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 (11) with which the polymer film is irradiated is obtained by folding a tail of an original beam (51) 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.Type: GrantFiled: March 26, 2014Date of Patent: July 18, 2017Assignee: NITTO DENKO CORPORATIONInventors: Satoru Furuyama, Yozo Nagai, Junichi Moriyama, Yosuke Yuri, Takahiro Yuyama, Tomohisa Ishizaka, Ikuo Ishibori, Ken-ichi Yoshida, Yasunari Maekawa, Hiroshi Koshikawa, Tetsuya Yamaki, Masaharu Asano
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Publication number: 20160304679Abstract: The method of the present disclosure includes: (I) irradiating a polymer film (1) with an ion beam composed of ions (2) accelerated in a cyclotron so as to form a polymer film that has collided with the ions in the beam; and (II) chemically etching the polymer film formed in the irradiation (I) so as to form openings (4b) and/or through holes (4a) corresponding to tracks (3) left by the colliding ions in the polymer film. In the irradiation (I), a beam current value of the ion beam is detected upstream and/or downstream of the polymer film in a path of the ion beam, and an irradiation conditioning factor in the irradiation of the polymer film with the ion beam is controlled based on the detected beam current value so that the polymer film can be irradiated with the ions at a predetermined irradiation density. The method of the present disclosure is suitable for industrial production of porous polymer films.Type: ApplicationFiled: March 26, 2014Publication date: October 20, 2016Inventors: Satoru FURUYAMA, Yuuzou MURAKI, Yozo NAGAI, Ichiro AMINO, Yosuke YURI, Takahiro YUYAMA, Tomohisa ISHIZAKA, Ikuo ISHIBORI, Ken-ichi YOSHIDA, Yasunari MAEKAWA, Hiroshi KOSHIKAWA, Tetsuya YAMAKI, Masaharu ASANO
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Publication number: 20160289402Abstract: 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 (11) with which the polymer film is irradiated is obtained by folding a tail of an original beam (51) 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.Type: ApplicationFiled: March 26, 2014Publication date: October 6, 2016Inventors: Satoru FURUYAMA, Yozo NAGAI, Junichi MORIYAMA, Yosuke YURI, Takahiro YUYAMA, Tomohisa ISHIZAKA, Ikuo ISHIBORI, Ken-ichi YOSHIDA, Yasunari MAEKAWA, Hiroshi KOSHIKAWA, Tetsuya YAMAKI, Masaharu ASANO
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Patent number: 9379402Abstract: 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.Type: GrantFiled: March 5, 2013Date of Patent: June 28, 2016Assignees: Japan Atomic Energy Agency, Daihatsu Motor Co., Ltd.Inventors: Kimio Yoshimura, Hiroshi Koshikawa, Tetsuya Yamaki, Masaharu Asano, Yasunari Maekawa, Hideyuki Shishitani, Hirohisa Tanaka, Susumu Yamaguchi, Koichiro Asazawa, Kazuya Yamamoto, Fumihiro Sanpei
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Publication number: 20150065597Abstract: Disclosed is a method for producing a porous polymer film. This method includes the steps of: (I) irradiating a polymer film with an ion beam of accelerated ions so as to form a polymer film that has collided with the ions in the beam; and (II) chemically etching the polymer film formed in the step (I) so as to form openings and/or through holes corresponding to tracks of the colliding ions left in the polymer film. In the step (I), the polymer film is placed in an atmosphere with a pressure of 100 Pa or more, and the polymer film placed in the atmosphere is irradiated with the ion beam that has passed through a beam line maintained at a lower pressure than the pressure of the atmosphere and through a pressure barrier sheet disposed at an end of the beam line to separate the beam line from the atmosphere.Type: ApplicationFiled: March 27, 2013Publication date: March 5, 2015Inventors: Satoru Furuyama, Junichi Moriyama, Yozo Nagai, Yosuke Yuri, Ikuo Ishibori, Takahiro Yuyama, Tomohisa Ishizaka, Susumu Okumura, Yasunari Maekawa, Hiroshi Koshikawa, Tetsuya Yamaki, Masaharu Asano
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Publication number: 20140066528Abstract: A graft chain containing an N-vinylimidazole derivative is introduced into a polymer substrate by radiation graft polymerization to obtain an alkyl substituted imidazolium salt by a reaction with an alkyl halide, so that an anion exchange membrane with high alkaline durability, in which a nucleophilic substitution reaction and an elimination reaction are inhibited, is obtained.Type: ApplicationFiled: August 28, 2013Publication date: March 6, 2014Applicants: Daihatsu Motor Co., Ltd., Japan Atomic Energy AgencyInventors: Kimio YOSHIMURA, Hiroshi KOSHIKAWA, Tetsuya YAMAKI, Masaharu ASANO, Yasunari MAEKAWA, Hideyuki SHISHITANI, Koichiro ASAZAWA, Susumu YAMAGUCHI, Hirohisa TANAKA
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Publication number: 20130280626Abstract: 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.Type: ApplicationFiled: March 5, 2013Publication date: October 24, 2013Inventors: Kimio YOSHIMURA, Hiroshi KOSHIKAWA, Tetsuya YAMAKI, Masaharu ASANO, Yasunari MAEKAWA, Hideyuki SHISHITANI, Hirohisa TANAKA, Susumu YAMAGUCHI, Koichiro ASAZAWA, Kazuya YAMAMOTO, Fumihiro SANPEI
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Patent number: 8329766Abstract: 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 104 to 1014 ions/cm2, 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.Type: GrantFiled: February 23, 2006Date of Patent: December 11, 2012Assignees: Japan Atomic Energy Agency, Toyota Jidosha Kabushiki KaishaInventors: Shigeharu Takagi, Toshiya Saito, Misaki Kobayashi, Masaru Yoshida, Tetsuya Yamaki, Masaharu Asano
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Patent number: 8241770Abstract: Polymer ion-exchange membranes having outstanding electrical conductivity, water retention and oxidation resistance are produced by the steps of uniformly mixing an organic high-molecular weight resin with functional inorganics having the abilities to promote graft polymerization of polymerizable monomers, adsorb water and conduct protons, irradiating the resulting functional inorganics/polymer membrane to initiate graft polymerization or graft copolymerization of polymerizable monomers having functional groups, and then introducing sulfonic acid groups into the graft chains.Type: GrantFiled: August 3, 2010Date of Patent: August 14, 2012Assignees: Japan Atomic Energy Agency, Nitto Denko CorporationInventors: Masaru Yoshida, Tetsuya Yamaki, Masaharu Asano, Yousuke Morita, Soji Nishiyama, Toshimitsu Tachibana, Yozo Nagai
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Patent number: 8232353Abstract: A polymer film substrate is irradiated with ions to make a large number of nano-sized through-holes and the substrate may be further irradiated with ionizing radiation so that a functional monomer may be grafted or co-grafted onto a surface of the film and within the holes; in addition, sulfonic acid group(s) may be introduced into the graft chains to produce a polymer ion-exchange membrane that may have high oxidation resistance, dimensional stability, electrical conductivity and/or methanol resistance, as well as may have an ion-exchange capacity controlled over a wide range.Type: GrantFiled: August 21, 2007Date of Patent: July 31, 2012Assignee: Japan Atomic Energy Research InstituteInventors: Masaru Yoshida, Tetsuya Yamaki, Masaharu Asano, Yosuke Morita
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Publication number: 20120148939Abstract: An anion exchange membrane includes a quaternary ammonium salt group in which two methyl groups, and one alkyl group having 3 to 8 carbon atoms are bonded to a nitrogen atom.Type: ApplicationFiled: November 3, 2011Publication date: June 14, 2012Applicant: JAPAN ATOMIC ENERGY AGENCYInventors: Kazuya Yamamoto, Koji Yamada, Susumu Yamaguchi, Hirohisa Tanaka, Masaharu Asano, Tetsuya Yamaki, Hiroshi Koshikawa, Yasunari Maekawa, Warapon Sinananwanich
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Patent number: 8173325Abstract: 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.Type: GrantFiled: February 20, 2006Date of Patent: May 8, 2012Assignees: Japan Atomic Energy Agency, Toyota Jidosha Kabushiki KaishaInventors: Shigeharu Takagi, Misaki Kobayashi, Toshiya Saito, Masaru Yoshida, Masaharu Asano, Tetsuya Yamaki
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Patent number: 8129074Abstract: A crosslinked nano-inorganic particle/polymer electrolyte membrane composed of a polymer film substrate, graft molecular chains bound to the backbone skeleton of the polymer film substrate and comprising a vinyl monomer graft-polymerized, sulfonic groups bound to the graft molecular chains, and an inorganic material as nano-scale particles uniformly dispersed within a crosslinked structure ascribed to the backbone skeleton of the polymer film substrate and the graft molecular chains, wherein the backbone skeleton of the polymer film substrate, the graft molecular chains, and the nano-inorganic particles mutually construct a crosslinked structure.Type: GrantFiled: November 16, 2006Date of Patent: March 6, 2012Assignees: Japan Atomic Energy Agency, Nitto Denko CorporationInventors: Jinhua Chen, Masaru Yoshida, Masaharu Asano, Tetsuya Yamaki, Toshimitsu Tachibana, Soji Nishiyama, Yozo Nagai
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Patent number: 7919537Abstract: A method for producing a polymer electrolyte membrane for electrolyte fuel cells includes: irradiating gamma rays onto a polymer substrate to obtain a crosslinked polytetrafluoroetylene substrate, grafting a styrenic monomer and bis(vinylphenyl)ethane as monomers to the crosslinked polymer substrate, and introducing sulfonic acid groups into graft side chains formed by grafting. Fluoro polymer substrates such as polytetrafluoroethylene and ethylene tetrafluoroethylene copolymer may be used.Type: GrantFiled: November 7, 2005Date of Patent: April 5, 2011Assignees: Japan Atomic Energy Agency, Nitto Denko CorporationInventors: Yozo Nagai, Toshimitsu Tachibana, Soji Nishiyama, Tetsuya Yamaki, Masaharu Asano, Masaru Yoshida
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Publication number: 20100297529Abstract: Polymer ion-exchange membranes having outstanding electrical conductivity, water retention and oxidation resistance are produced by the steps of uniformly mixing an organic high-molecular weight resin with functional inorganics having the abilities to promote graft polymerization of polymerizable monomers, adsorb water and conduct protons, irradiating the resulting functional inorganics/polymer membrane to initiate graft polymerization or graft copolymerization of polymerizable monomers having functional groups, and then introducing sulfonic acid groups into the graft chains.Type: ApplicationFiled: August 3, 2010Publication date: November 25, 2010Applicants: JAPAN ATOMIC ENERGY AGENCY, NITTO DENKO CORPORATIONInventors: Masaru YOSHIDA, Tetsuya YAMAKI, Masaharu ASANO, Yousuke MORITA, Soji NISHIYAMA, Toshimitsu TACHIBANA, Yozo NAGAI
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Patent number: 7803846Abstract: The objective of the invention is to solve the problems of conventional polymer electrolyte membranes, including small ion-exchange capacity and low oxidation and methanol resistance. A polymer film substrate is irradiated with ?-rays, electron beams or other radiations to perform multi-graft polymerization with functional monomers and then the polymer film substrate containing the grafted molecular chains or the graft molecular chains into which sulfonic acid groups have been introduced is crosslinked by irradiation to produce a polymer electrolyte membrane that has outstanding oxidation resistance, dimensional stability, electrical conductivity and methanol resistance and which can be controlled in ion-exchange capacity over a wide range.Type: GrantFiled: August 30, 2005Date of Patent: September 28, 2010Assignees: Japan Atomic Energy Agency, Nitto Denko CorporationInventors: Masaru Yoshida, Masaharu Asano, Tetsuya Yamaki, Soji Nishiyama, Toshimitsu Tachibana, Yozo Nagai
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Patent number: 7785726Abstract: Polymer ion-exchange membranes having outstanding electrical conductivity, water retention and oxidation resistance are produced by the steps of uniformly mixing an organic high-molecular weight resin with functional inorganics having the abilities to promote graft polymerization of polymerizable monomers, adsorb water and conduct protons, irradiating the resulting functional inorganics/polymer membrane to initiate graft polymerization or graft copolymerization of polymerizable monomers having functional groups, and then introducing sulfonic acid groups into the graft chains.Type: GrantFiled: April 5, 2006Date of Patent: August 31, 2010Assignees: Japan Atomic Energy Agency, Nitto Denko CorporationInventors: Masaru Yoshida, Tetsuya Yamaki, Masaharu Asano, Yousuke Morita, Soji Nishiyama, Toshimitsu Tachibana, Yozo Nagai
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Publication number: 20080171251Abstract: 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 10 4 to 10 14 ions/cm2, 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.Type: ApplicationFiled: February 23, 2006Publication date: July 17, 2008Applicants: JAPAN ATOMIC ENERGY AGENCY, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shigeharu Takagi, Toshiya Saito, Misaki Kobayashi, Masaru Yoshida, Tetsuya Yamaki, Masaharu Asano
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Publication number: 20080160374Abstract: 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.Type: ApplicationFiled: February 20, 2006Publication date: July 3, 2008Applicants: Japan Atomic Energy Agency, Toyota Jidosha Kabushiki KaishaInventors: Shigeharu Takagi, Misaki Kobayashi, Toshiya Saito, Masaru Yoshida, Masaharu Asano, Tetsuya Yamaki
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Patent number: 7276561Abstract: A polymer film substrate is irradiated with ions to make a large number of nano-sized through-holes and the substrate is further irradiated with an ionizing radiation so that a functional monomer is grafted or co-grafted onto a surface of the film and within the holes; in addition, the sulfonic acid group is introduced into the graft chains, thereby producing a polymer ion-exchange membrane that has high oxidation resistance, dimensional stability, electrical conductivity and methanol resistance, as well as an ion-exchange capacity controlled over a wide range.Type: GrantFiled: August 6, 2004Date of Patent: October 2, 2007Assignee: Japan Atomic Energy Research InstituteInventors: Masaru Yoshida, Tetsuya Yamaki, Masaharu Asano, Yosuke Morita