期刊
JOURNAL OF MEMBRANE SCIENCE
卷 660, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2022.120872
关键词
Polyphenylsulfone; Sulfonated polysulfone; V -LIPS; Microfiltration membrane; Hour -glass pore structure
资金
- National Natural Science Foundation of China [51973230]
- Zhejiang Provincial Natural Science Foundation of China for Distinguished Young Scholars [LR20E030002]
- Ten thousand plan -high level talents special support plan of Zhejiang province, China [ZJWR0108020]
- Youth Innovation Promotion Association of Chinese Academy of Science [2014258]
The research team prepared a PPSU/SPSf microfiltration membrane with an hour-glass' like spongy micropore structure using the V-LIPS technique. The membrane showed excellent separation performance for different emulsions and had high permeability under high pressure.
The fine micro-structure regulation of polymeric membranes is crucial to the separation performances. Herein, we prepared a novel Polyphenylsulfone (PPSU)/sulfonated polysulfone (SPSf) microfiltration membrane with hour-glass' like spongy micropore-structure via vapor and liquid induced phase separation (V-LIPS) technique. A precritical casting solution was prepared by adding a certain amount of H2O using N, N-dimethylacetamide (DMAc) as the solvent and Polyvinyl Pyrrolidone (PVP) as the pore-forming agent. The effect of residence time in vapor on membrane structures is extensively evaluated. Results revealed that the resultant membranes evolved from finger-like to bicontinuous structure with extending the exposure time (> 5s) in vapor. The pure water flux of the membrane with the vapor time (30s) under the pressure of 0.2 bar reached a high value of 3045.7 +/- 42.7 L/(m(2)center dot h). Moreover, the obtained membrane M3 showed excellent separation properties for surfactant-stabilized n-hexane-in-water, isooctane-in-water and decamethylcyclopentasiloxane (D5)-in-water emulsions with rejec-tion coefficient up to > 99%, > 99% and > 98% and high rejection of 99.0% to SiO2 nanoparticles. Therefore, PPSU/SPSf membrane with controlled hour-glass' like spongy micro-pore structure showed high permeability with high rejection coefficient for both inorganic nanoparticles and oily water.
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