Journal
APPLIED SURFACE SCIENCE
Volume 258, Issue 17, Pages 6398-6405Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2012.03.049
Keywords
PVDF membrane; Amphiphilic zwitterionic copolymer; Hydrophilicity; Anti-fouling ability
Categories
Funding
- Natural Science Foundation of Fujian Province [2011J01044]
- Scientific Research Foundation in Fuzhou University [2010-XQ-17, 022284]
- Opening Research Foundation of Key Laboratory of Biomedical Material in Tianjin city [00801103]
- Scientific Major Research Project of Fujian Province in China [2010NZ0001-1]
- Scientific Key Research Project of Fujian Province [2010N0015]
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An attempt to improve hydrophilicity and anti-fouling properties of PVDF membranes, a novel amphiphilic zwitterionic copolymer poly(vinylidene fluoride)-graft-poly(sulfobetaine methacrylate) (PVDF-g-PSBMA) was firstly synthesized by atom transfer radical polymerization (ATRP) and used as amphiphilic copolymer additive in the preparation of PVDF membranes. The PVDF-g-PSBMA/PVDF blend membranes were prepared by immersion precipitation process. Fourier transform infrared attenuated reflection spectroscopy (FTIR-ATR) and X-ray photoelectronic spectroscopy (XPS) measurements confirmed that PSBMA brushes from amphiphilic additives were preferentially segregated to membrane-coagulant interface during membrane formation. The morphology of membranes was characterized by scanning electron microscopy (SEM). Water contact angle measurements showed that the surface hydrophilicity of PVDF membranes was improved significantly with the increasing of amphiphilic copolymer PVDF-g-PSBMA in cast solution. Protein static adsorption experiment and dynamic fouling resistance experiment revealed that the surface enrichment of PSBMA brush endowed PVDF blend membrane great improvement of surface anti-fouling ability. (C) 2012 Elsevier B.V. All rights reserved.
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