SOLVENT-RESISTANT POLYMER NANOFILTRATION MEMBRANE, PREPARATION METHOD THEREFOR, AND USE THEREOF

Title:

SOLVENT-RESISTANT POLYMER NANOFILTRATION MEMBRANE, PREPARATION METHOD THEREFOR, AND USE THEREOF

Document Type and Number:

WIPO Patent Application WO/2021/227330

Kind Code:

A1

Abstract:

A solvent-resistant polymer nanofiltration membrane, a preparation method therefor, and the use thereof. The preparation method therefor comprises the following steps: subjecting an diamine monomer and a dianhydride monomer to cyclization and imidization under the action of a catalyst in a first polar organic solvent at 160-230°C, and forming a polyimide after the reaction is completed, wherein the diamine monomer includes a carboxyl-containing diamine monomer and a carboxyl-free diamine monomer; dissolving the polyimide in a second polar organic solvent to form a membrane-forming solution with a concentration of 10-40 wt%; then subjecting the membrane-forming solution to membrane formation and then phase transformation to obtain an intermediate membrane; and treating the intermediate membrane with an organic solution of a metal salt, such that metal ions are coordinated and crosslinked with the carboxyl in the polyimide, and after crosslinking, the solvent-resistant polymer nanofiltration membrane is obtained, wherein the metal salt is selected from metal salts and/or polyvalent metal salts, and the solvent-resistant polymer nanofiltration membrane is used for separating and/or purifying compounds in an organic solution.

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Inventors:

JIN JIAN (CN)
WANG ZHENGGONG (CN)

Application Number:

PCT/CN2020/116667

Publication Date:

November 18, 2021

Filing Date:

September 22, 2020

Export Citation:

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Assignee:

UNIV SOOCHOW (CN)

International Classes:

B01D71/64; B01D61/02; B01D67/00; B01D69/02; B01D69/06; C08G73/10

Domestic Patent References:

WO2003053548A1	2003-07-03
WO2014123091A1	2014-08-14

Foreign References:

CN111514768A	2020-08-11
JP2019018178A	2019-02-07
CN110801736A	2020-02-18
CN109880126A	2019-06-14
CN103025796A	2013-04-03

Other References:

LINA NIE, KUNLI GOH, YU WANG, JAEWOO LEE , YINJUAN HUANG , H. ENIS KARAHAN , KUN ZHOU , MICHAEL D. GUIVER, TAE-HYUN BAE: "Realizing small-flake graphene oxide membranes for ultrafast size-dependent organic solvent nanofiltration", SCIENCE ADVANCES, vol. 6, no. 17, 24 April 2020 (2020-04-24), pages 1 - 12, XP055867535, ISSN: 2375-2548

Attorney, Agent or Firm:

CENTRAL SOUTH WELL INTELLECTUAL PROPERTY OFFICE (CN)

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