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Preparation of Poly(vinylidene fluoride)-g-poly(methacrylic acid) Composite Nanofiltration Membrane  

Kim, Yong-Woo (Department of Chemical Engineering, Yonsei University)
Choi, Jin-Kyu (Department of Chemical Engineering, Yonsei University)
Koh, Joo-Hwan (Department of Chemical Engineering, Yonsei University)
Kim, Jong-Hak (Department of Chemical Engineering, Yonsei University)
Publication Information
Korean Membrane Journal / v.9, no.1, 2007 , pp. 57-63 More about this Journal
Abstract
Amphiphilic graft copolymer from poly(vinylidene fluoride) (PVDF) was synthesized using atom transfer radical polymerization (ATRP) for composite nanofiltration membranes. Direct initiation of the secondary fluorinated site of PVDF facilitates grafting of tert-butyl methacrylate (tBMA). Amphiphilic PVDF-g-PMAA graft copolymer with a 51:49 wt ratio was obtained by hydrolyzing poly(tert-butyl methacrylate) (PtBMA) to poly(methacrylic acid) (PMAA). Wide angle X-ray scattering (WAXS) and differential scanning calorimetry (DSC) confirmed the decrease of crystallinity of PVDF upon graft copolymerization. Composite nanofiltration membranes were prepared from PVDF-g-PMAA as a top layer coated onto PVDF ultrafiltration (UF) support membrane. The morphology and hydrophilicity of membranes were characterized using scanning electron microscopy (SEM) and contact angle measurement. The rejections of composite membranes were 80.2% for $Na_2SO_4$ and 28.4% for NaCl, and the solution flux were 9.5 and $14.5\;L/m^2\;h$ at 1.0 MPa pressure.
Keywords
atom transfer radical polymerization (ATRP); graft copolymer; composite membrane; nanofiltration;
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Times Cited By KSCI : 1  (Citation Analysis)
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