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Preparation of Poly(vinyl chloride)-graft-poly(styrene sulfonic acid) Composite Nanofiltration Membranes  

Kim, Jong-Hak (Department of Chemical Engineering, Yonsei University)
Park, Jung-Tae (Department of Chemical Engineering, Yonsei University)
Koh, Joo-Hwan (Department of Chemical Engineering, Yonsei University)
Roh, Dong-Kyu (Department of Chemical Engineering, Yonsei University)
Seo, Jin-Ah (Department of Chemical Engineering, Yonsei University)
Publication Information
Membrane Journal / v.18, no.2, 2008 , pp. 132-137 More about this Journal
Abstract
Nanofiltration membranes were prepared based on coating a sulfonated comb-like copolymer layer on top of a poly(vinylidene fluoride) (PVDF) support. The comb-like copolymer comprising poly(vinyl chloride) backbone and poly(styrene sulfonic acid) side chains, i.e. PVC-g-PSSA was synthesized by atom transfer radical polymerization (ATRP) using direct initiation of the secondary chlorines of PVC. The successful synthesis of graft copolymers were confirmed by nuclear magnetic resonance ($^1H$-NMR), FT-IR spectroscopy and wide angle X-ray scattering (WAXS). Composite nanofiltration membranes consisting PVC-g-PSSA as a top layer exhibited the increase of both rejections and solution flux with increasing PSSA concentration. This performance enhancement is presumably due to the increase of SO3H groups and membrane hydrophilicity. The rejections of composite membranes containing 71 wt% of PSSA were 88% for $Na_2SO_4$ and 33% for NaCl, and the solution flux were 26 and $34L/m^2h$, respectively, at 0.3 MPa pressure.
Keywords
atom transfer radical polymerization(ATRP); graft copolymer; composite membrane; nanofiltration;
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Times Cited By KSCI : 5  (Citation Analysis)
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