期刊
JOURNAL OF MEMBRANE SCIENCE
卷 439, 期 -, 页码 12-19出版社
ELSEVIER
DOI: 10.1016/j.memsci.2013.03.036
关键词
Dilute PVDF solution; Asymmetric microporous membrane; Electrospun nanofibers; Composite microfiltration membrane; Screen-filter
资金
- Main Direction Program of Knowledge Innovation of Chinese Academy of Sciences [KJCX2-YW-H19]
- National Natural Science Foundation of China [20904060]
A dilute PVDF solution with concentration lower than 8 wt% was investigated using the Loeb-Sourirajan process to produce an asymmetric microporous membrane. The parameters such as polymer concentration and solution composition were optimized and a type of asymmetric microporous membrane with high porosity, thin barrier layer, narrow pore size distribution, short pore flow distance and self-similar structure was obtained. A composite microfiltration membrane, consisting of an asymmetric microporous membrane, ultrathin nanofibers and non-woven PET fabric was constructed and evaluated in the filtration test. In comparison to the commercial microfiltration membrane and raw electrospun nanofibrous membrane, the novel composite microfiltration membrane exhibited a much better performance: dramatically high water flux, high selectivity, low fouling tendency and excellent flux recovery property. (C) 2013 Elsevier B.V. All rights reserved.
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