Title:
COMPOSITE SEMIPERMEABLE MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2017/110898
Kind Code:
A1
Abstract:
A composite semipermeable membrane according to the present invention is provided with a support membrane and a separation function layer. In the membrane, the separation function layer contains an aromatic polyamide; the aromatic polyamide contains a nitro group as a functional group that is bound to an aromatic ring; when the total number, which is represented by A, of nitrogen atoms derived from the nitro group in the aromatic polyamide and the total number, which is represented by B, of nitrogen atoms in the aromatic polyamide are analyzed by X-ray photoelectron spectroscopy, the separation function layer satisfies the formula: C-D ≥ 0.010 wherein C represents an A/B value obtained when X-ray is emitted from one surface of the separation function layer and D represents an A/B value obtained when X-ray is emitted from the other surface of the separation function layer; and the other surface of the separation function layer is in contact with the support membrane.
Inventors:
SATO KAZUKI (JP)
SASAKI TAKAO (JP)
SASAKI TAKAO (JP)
Application Number:
PCT/JP2016/088153
Publication Date:
June 29, 2017
Filing Date:
December 21, 2016
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B01D71/56; B01D69/12; B01D71/82; C08G69/32
Domestic Patent References:
| WO2015087635A1 | 2015-06-18 | |||
| WO2016104781A1 | 2016-06-30 |
Foreign References:
| JP2005270794A | 2005-10-06 | |||
| JPH0596140A | 1993-04-20 | |||
| JP2010094641A | 2010-04-30 |
Other References:
LIU,MEIHONG: "Improving fouling resistance and chlorine stability of aromatic polyamide thin-film composite RO membrane by surface grafting of polyvinyl alcohol(PVA", DESALINATION, vol. 367, 1 July 2015 (2015-07-01), pages 11 - 20, XP029216602, DOI: doi:10.1016/j.desal.2015.03.028
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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