Title:
NANOFILTRATION MEMBRANE PREPARATION METHOD AND NANOFILTRATION MEMBRANE PREPARED THEREBY
Document Type and Number:
WIPO Patent Application WO/2023/231317
Kind Code:
A1
Abstract:
A nanofiltration membrane preparation method, and a nanofiltration membrane prepared thereby. The preparation method comprises the following steps: preparing a casting solution, and solidifying the casting solution on a reinforcing material to form a base membrane, the casting solution comprising a polymer, a solvent and optionally a hydrophilic nanofiller; sequentially bringing the base membrane in contact with an aqueous phase solution and an oil phase solution so as to form a functional layer on the base membrane by means of interfacial polymerization, the aqueous phase solution comprising an aqueous phase monomer, an acid binding agent and a positive charge regulator, and the oil phase solution comprising an oil phase monomer, a solvent and a pore size regulator; and obtaining a nanofiltration membrane after post-processing.
Inventors:
LIANG SONGMIAO (CN)
HU LIJIE (CN)
ZHANG BINGJIE (CN)
HU LIJIE (CN)
ZHANG BINGJIE (CN)
Application Number:
PCT/CN2022/132774
Publication Date:
December 07, 2023
Filing Date:
November 18, 2022
Export Citation:
Assignee:
VONTRON TECH CO LTD (CN)
International Classes:
B01D69/12; B01D71/56; B01D71/68
Foreign References:
| CN105498547A | 2016-04-20 | |||
| CN104667759A | 2015-06-03 | |||
| CN113262644A | 2021-08-17 | |||
| CN110975622A | 2020-04-10 | |||
| CN105013333A | 2015-11-04 | |||
| CN112844046A | 2021-05-28 | |||
| CN101934201A | 2011-01-05 | |||
| JP2019130481A | 2019-08-08 |
Attorney, Agent or Firm:
LINDA LIU & PARTNERS (CN)
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