Toyota Jidosha Kabushiki Kaisha

Asahi Glass Company, Limited

Osaka University

Hiroshi Uyama

Tsuyoshi Inoue

Chiaki Yoshizawa

Seigo Kotera

Kohji Nishida

Akio Minakuchi

Kohei Matsunobu

Tomoyuki Uezono

Hiroyuki Watabe

Ichiro Terada

Koichi Baba

Kei Ohkubo

Katsuya Fujii

Haruyasu Asahara

Chie Matsubara

Shizuka Koh

Taka-Aki Asoh

Provided is a method of producing a porous body of a water-insoluble polymer, the method being excellent in terms of simplicity. The method of producing a porous body of a water-insoluble polymer disclosed here includes the steps of: preparing a solution in which a water-insoluble polymer is dissolved in a mixed solvent containing a good solvent for the water-insoluble polymer and a poor solvent for the water-insoluble polymer; and removing the mixed solvent from the solution by vaporization. The poor solvent has a boiling point higher than a boiling point of the good solvent. A porous body is obtained by removing the mixed solvent by vaporization to form pores.

Method of producing porous body of water-insoluble polymer

Provided is a method of producing a resin porous body using a water-insoluble polymer, the method being excellent in terms of simplicity and capable of suppressing formation of a skin layer. A method of producing a resin porous body disclosed herein includes the steps of: preparing a coating liquid in which a water-insoluble polymer is dissolved and insulating particles are dispersed in a mixed solvent containing a good solvent for the water-insoluble polymer and a poor solvent for the water-insoluble polymer; coating the coating liquid on a substrate; and removing the mixed solvent from the coated coating liquid by vaporization. The poor solvent has a boiling point higher than a boiling point of the good solvent. Pores are formed by removing the mixed solvent by vaporization to obtain a porous body.

Method of manufacturing resin porous body

Provided is a method of producing a porous body of an ethylene-vinyl alcohol copolymer, the method being excellent in terms of simplicity. The method of producing a porous body of an ethylene-vinyl alcohol copolymer disclosed here includes the steps of: preparing a solution in which an ethylene-vinyl alcohol copolymer is dissolved in a mixed solvent of water and propyl alcohol; and removing the mixed solvent from the solution by vaporization. A porous skeleton and pores are formed in the step of removing the mixed solvent by vaporization.

Method of producing porous body of ethylene-vinyl alcohol copolymer

The disclosure provides a very simple and convenient method for producing a porous material of a water-soluble polymer. The herein disclosed method for producing a porous material of a water-soluble polymer includes a step of preparing an emulsion containing a water-soluble polymer, water, and a dispersoid, wherein the water-soluble polymer is dissolved and the dispersoid is dispersed in the emulsion, and a step of evaporating and thereby removing the water and the dispersoid from the emulsion. The boiling point of the dispersoid is higher than the boiling point of water. The solubility of the water-soluble polymer in the dispersoid is lower than the solubility of the water-soluble polymer in water.

Method for producing porous material of water-soluble polymer

The disclosure provides a very simple and convenient method for producing a porous material of a water-soluble polymer. The herein disclosed method for producing a porous material of a water-soluble polymer includes a step of preparing a solution in which a water-soluble polymer is dissolved in a mixed solvent of water mixed with a solvent having a boiling point higher than that of water, and a step of evaporating and thereby removing the mixed solvent from the solution. The solubility of the water-soluble polymer in the solvent having a boiling point higher than that of water is lower than the solubility of the water-soluble polymer in water. Voids are formed, in the step of evaporating and thereby removing the mixed solvent, by the solvent having a boiling point higher than that of water.

To provide a process whereby an ultrafine fiber of a fluorinated ion exchange resin can be produced easily at low cost, and a method whereby a catalyst layer having a high gas diffusion property can be produced easily at low cost. A process for producing a fiber by spinning a spinning solution containing a fluorinated ion exchange resin and a solvent by a dry spinning method, or producing an electrically conductive composite fiber by spinning n types (where n is an integer of at least 2) of spinning solutions, of which at least one type contains a fluorinated ion exchange resin and a solvent, and at least one type contains an electrically conductive material and a solvent, simultaneously by a dry spinning method, wherein the spinning solution which is being spun by the dry spinning method, is stretched by a gas stream; and a method for producing a catalyst layer, which comprises accumulating the fiber produced by such a process to form a non-woven fabric thereby to obtain a catalyst layer having the non-woven fabric.

Process for producing fiber and method for producing catalyst layer

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Suita, Japan

Hiroshi Uyama