Title:
METHOD FOR PREPARING RARE EARTH-MODIFIED POLYETHERSULFONE ULTRAFILTRATION MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2021/237381
Kind Code:
A1
Abstract:
A method for preparing a rare earth-modified polyethersulfone ultrafiltration membrane, comprising the steps of: dissolving lanthanum nitrate in deionized water to obtain a solution A, dissolving ammonium paratungstate and potassium carbonate in deionized water to obtain a solution B, and dissolving citric acid in ionized water to obtain a solution C; adding half of solution C to solution A and the other half to solution B, and separately stirring the mixed solutions; slowly adding solution A to solution B, and simultaneously adding ethylene glycol, heating the mixed solution to 65-70°C and stirring the same for 2-4 h to obtain a sol; transferring the obtained sol to a constant temperature blast drying oven and heating the sol for 25-27 h, and then transferring same to a vacuum drying oven to obtain a gel; stirring and dissolving dried PES, a porogen PEG400, and the gel prepared above in DMAC, leaving the solution to stand for deaeration, scraping the membrane on a glass plate with a scraper, and then putting the membrane into ultrafiltered water to form a natural membrane to obtain the product. The polyethersulfone flat membrane with the rare earth added has a notably increased pure water flux and improved mechanical properties, and has a significant antibacterial effect.
Inventors:
XIE CHAO (CN)
Application Number:
PCT/CN2020/091949
Publication Date:
December 02, 2021
Filing Date:
May 23, 2020
Export Citation:
Assignee:
HAIMEN MAOFA ART DESIGN CO LTD (CN)
International Classes:
B01D69/02; B01D67/00; B01D69/06
Foreign References:
| CN111085111A | 2020-05-01 | |||
| CN106943899A | 2017-07-14 | |||
| CN102029117A | 2011-04-27 | |||
| CN101224392A | 2008-07-23 | |||
| CN108744994A | 2018-11-06 | |||
| CN110449036A | 2019-11-15 | |||
| CN110652887A | 2020-01-07 | |||
| CN110790411A | 2020-02-14 | |||
| US20140322518A1 | 2014-10-30 |
Download PDF:
Previous Patent: METHOD FOR PREPARING MULTIFUNCTIONAL MOISTURE ABSORBING AND HEATING FIBER
Next Patent: METHOD FOR PREPARING BAMBOO PULP NANOCELLULOSE
Next Patent: METHOD FOR PREPARING BAMBOO PULP NANOCELLULOSE