期刊
APPLIED SURFACE SCIENCE
卷 253, 期 20, 页码 8377-8388出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2007.04.001
关键词
poly(vinylidene fluoride) (PVDF); hydrophilicity; crystallinity; blends
Films of poly(vinylidene fluoride) (PVDF)/poly(methyl methacrylate) (PMMA) blend were derived from a special procedure of casting semi-dilute solutions. Hydrophilic character and crystallization of PVDF were optimized by variation of PMMA concentration in PVDF/PMMA blends. It was found that a PVDF/PMMA blend containing 70 wt% PMMA has a good performance for the potential application of hydrophilic membranes via thermally induced phase separation. The films presented 0 crystalline phase regardless of PMMA content existed in the blends. Thermal analysis of the blends showed a promotion of crystallization of PVDF with small addition of PMMA which induced larger lamellar thickness of PVDF, leading to the largest spherulitic crystal of PVDF (10 wt% PMMA) is about 8 mu m. SEM micrographs illustrated no phase separation occurred in blends, due to the high compatibility between PVDF and PMMA. (c) 2007 Elsevier B.V All rights reserved.
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