Title:
METHOD FOR PRODUCING POROUS HOLLOW FIBER MEMBRANE FOR HUMIDIFICATION
Document Type and Number:
WIPO Patent Application WO/2020/004212
Kind Code:
A1
Abstract:
In the present invention, a porous hollow fiber membrane for humidification is produced by subjecting a spinning dope, which comprises a water-soluble organic solvent solution of a polyphenylsulfone resin and a hydrophilic polyvinylpyrrolidone, to dry-wet spinning using water as a core liquid, then carrying out a crosslinking treatment for 1-20 hours at a temperature of 120-220ºC, and then immersing the resultant material in an acidic solution having a concentration of 5-500 ppm. The obtained porous hollow fiber membrane enables an improvement in hydrophilic properties and can increase the humidifying performance of a porous hollow fiber membrane body without compromising wettability, and is therefore effective as a humidifying membrane for a fuel cell.
Inventors:
TAKAGI TAKAYUKI (JP)
EMOTO TSUYOSHI (JP)
EMOTO TSUYOSHI (JP)
Application Number:
PCT/JP2019/024474
Publication Date:
January 02, 2020
Filing Date:
June 20, 2019
Export Citation:
Assignee:
NOK CORP (JP)
International Classes:
B01D71/68; B01D69/08; B01D71/44; H01M8/04; H01M8/04119; H01M8/04291; H01M8/10
Domestic Patent References:
| WO2019082562A1 | 2019-05-02 |
Foreign References:
| JP2004290751A | 2004-10-21 | |||
| JP2013094692A | 2013-05-20 | |||
| JP2012507393A | 2012-03-29 | |||
| JP2008543546A | 2008-12-04 | |||
| JP2002166144A | 2002-06-11 | |||
| JP2001219043A | 2001-08-14 | |||
| JP2004290751A | 2004-10-21 |
Other References:
NAVARRO, R. ET AL.: "Effect of an acidic treatment on the chemical and charge properties of a nanofiltration membrane", JOURNAL OF MEMBRANE SCIENCE, vol. 307, no. 1, 2008, pages 136 - 148, XP022392372
See also references of EP 3815773A4
See also references of EP 3815773A4
Attorney, Agent or Firm:
YOSHIDA Toshio et al. (JP)
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