Title:
COMPOSITE SEPARATION MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2017/064936
Kind Code:
A1
Abstract:
Provided is a composite separation membrane that is provided with separating layers, said separating layers comprising SPAE and being positioned on the surface of a porous supporting membrane, and has dramatically improved characteristics of fractionating neutral low molecular substances and a high water permeability. The composite separation membrane according to the present invention is provided with separating layers formed on the surface of a porous supporting membrane, wherein: the porous supporting membrane contains 50 mass% or more of polyphenylene ether; the separating layers consist of a first separating layer and a second separating layer; the first separating layer is formed on the surface of the porous supporting membrane, has a thickness of 50 nm inclusive to 1 μm inclusive, and comprises a sulfonated polyarylene ether copolymer having a repeated structure consisting of a specific hydrophobic segment and a specific hydrophilic segment; and the second separating layer is formed on the surface of the first separating layer, has a thickness of 1 nm inclusive to 50 nm exclusive, and comprises an alternating laminate configured of one or more kinds of ionomers.
Inventors:
OHKAME TAKASHI (JP)
Application Number:
PCT/JP2016/075698
Publication Date:
April 20, 2017
Filing Date:
September 01, 2016
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B01D71/52; B01D69/10; B01D69/12; B01D71/38; B01D71/68; B01D71/82
Domestic Patent References:
| WO2014054346A1 | 2014-04-10 | |||
| WO2015141653A1 | 2015-09-24 |
Foreign References:
| JP2013223852A | 2013-10-31 | |||
| JPH04367715A | 1992-12-21 | |||
| JPS52111888A | 1977-09-19 |
Attorney, Agent or Firm:
KAZAHAYA, Nobuaki et al. (JP)
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