Title:
PREPARATION METHOD FOR COMPOSITE NANOFILTRATION MEMBRANE, AND COMPOSITE NANOFILTRATION MEMBRANE PREPARED THEREBY
Document Type and Number:
WIPO Patent Application WO/2023/116287
Kind Code:
A1
Abstract:
The present disclosure relates to a preparation method for a composite nanofiltration membrane, and a composite nanofiltration membrane prepared thereby. The preparation method for a composite nanofiltration membrane comprises the following steps: preparing a polymer solution as a casting solution, and curing the casting solution on a reinforcing material to form a base membrane; then sequentially contacting the base membrane with an aqueous phase solution comprising an amine compound, a silane coupling agent and a biomass acid, and an oil phase solution comprising polyacyl chloride to form a functional layer; and post-treating and drying the functional layer to obtain a composite nanofiltration membrane. In the preparation method of the present disclosure, a base membrane having different surface average pore sizes is obtained by adjusting the concentration of the polymer in the casting solution; the silane coupling agent and the biomass acid are added to the aqueous phase solution to eliminate other reaction variable factors, so that the interfacial polymerization reaction is only influenced by the average pore sizes of the base membrane, and accordingly a composite nanofiltration membrane comprising functional layers having different surface average pore sizes is obtained, so that the composite nanofiltration membrane has different maximum molecular weight cut-offs.
Inventors:
ZENG HUAN (CN)
CHEN XINDI (CN)
HU LIJIE (CN)
LIANG SONGMIAO (CN)
CHEN XINDI (CN)
HU LIJIE (CN)
LIANG SONGMIAO (CN)
Application Number:
PCT/CN2022/132634
Publication Date:
June 29, 2023
Filing Date:
November 17, 2022
Export Citation:
Assignee:
VONTRON TECH CO LTD (CN)
International Classes:
B01D69/12; B01D71/36
Foreign References:
| CN101934201A | 2011-01-05 | |||
| CN111298660A | 2020-06-19 | |||
| CN106215726A | 2016-12-14 | |||
| CN113318598A | 2021-08-31 | |||
| JP2014000568A | 2014-01-09 |
Attorney, Agent or Firm:
LINDA LIU & PARTNERS (CN)
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