期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 11, 页码 9603-9613出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b15682
关键词
oil/water separation; superhydrophilic membrane; zwitterionic polymer; membrane blending; antifouling surface
资金
- Key Project of National Natural Science Foundation of China [21433012]
- China Postdoctoral Science Foundation [2015M590511]
- National Natural Science Foundation of China [51625306, 51603229, 21406258]
- Natural Science Foundation of Jiangsu Province [BE2015072, BK20140384, BK20140385]
- Key Laboratory of Adsorption and Separation Materials and Technologies of Zhejiang Province [XFFL2015]
Because of weak hydrophilicity, membranes always experience fouling problems during separations. This phenomenon seriously impedes the development of membrane technologies for practical industrial-oil wastewater treatment. In this work, we successfully fabricated a super hydrophilic zwitterionic poly(vinylidene fluoride) (PVDF) membrane using a two-part process with an in situ cross linking reaction during nonsolvent-induced phase separation and a subsequent sulfonation reaction. To prepare this zwitterionic PVDF membrane, a copolymer poly(dimethylaminoethyl methacrylate-co-2-hydroxyethyl methacrylate) (PDH) was synthesized as a zwitterionic polymer precursor and used as an additive in membrane preparation. This zwitterionic additive is well-immobilized in the membrane using in situ cross-linking to ensure the long-term stability of the membrane, and subsequent sulfonation transforms the precursor to a zwitterionic polymer to produce a superhydrophilic membrane. This superhydrophilic zwitterionic PVDF membrane exhibits high water permeation flux and good antifouling properties for separating oil-in-water emulsions with high separation efficiency.
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