Title:
造膜溶液とそれを使用した分離膜の製造方法
Document Type and Number:
Japanese Patent JP7026344
Kind Code:
B2
Abstract:
Providing a membrane-forming solution suitable for producing a separation membrane such as a hollow fiber membrane and a flat membrane. A membrane-forming solution including triacetylcellulose having an acetyl group substitution degree of 2.7 or higher, a good solvent for thermally induced phase separation and a poor solvent for thermally induced phase separation, wherein the good solvent is capable of heat-dissolving the triacetylcellulose (at a solid content concentration of 25 mass %), and the poor solvent is incapable of dissolving the triacetylcellulose up to the heat dissolution temperature of the good solvent, wherein both the good solvent and the poor solvent are included so as to enable phase separation of the heat-dissolved triacetylcellulose solution while the heat-dissolved triacetylcellulose solution is cooled to room temperature (from 20 to 30° C.), and wherein a mixing ratio in a total amount of the good solvent and the poor solvent is from 5 to 40 mass % of the good solvent and from 60 to 95 mass % of the poor solvent.
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Inventors:
Hideto Matsuyama
John Son Il
Shota Takao
Toyoda Hamada
John Son Il
Shota Takao
Toyoda Hamada
Application Number:
JP2017143196A
Publication Date:
February 28, 2022
Filing Date:
July 25, 2017
Export Citation:
Assignee:
Daicel Corporation
National University Corporation Kobe University
National University Corporation Kobe University
International Classes:
B01D69/00; B01D71/16; B01D69/02; B01D69/08; D01F1/08
Domestic Patent References:
| JP1159023A | ||||
| JP62091543A | ||||
| JP2003320227A |
Foreign References:
| WO2014208603A1 |
Attorney, Agent or Firm:
Satoshi Furuya
Yoshitsune Kazumasa
Yoshitsune Kazumasa