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Convenient Preparation of Ion-Exchange PVdF Membranes by a Radiation-Induced Graft Polymerization for a Battery Separator  

Kim, Sang-Kyum (Department of Chemistry, Hannam University)
Ryu, Jung-Ho (Department of Chemistry, Hannam University)
Kwen, Hai-Doo (Department of Chemistry, Hannam University)
Chang, Choo-Hwan (Department of Chemistry, Hannam University)
Cho, Seong-Ho (Department of Chemistry, Hannam University)
Publication Information
Polymer(Korea) / v.34, no.2, 2010 , pp. 126-132 More about this Journal
Abstract
A cation-exchange nanofiber poly(vinylidene fluoride) (PVdF) membrane was prepared by a radiation-induced graft polymerization (RIGP) of sodium styrene sulfonate (NaSS) in the presence of the polymerizable access agents in methanol solution. The used polymerizable access agents include styrene, acrylic acid, and vinyl pyrrolidone. The anion-exchange nanofiber PVdF membrane was also prepared by RIGP of glycidyl methacrylate (GMA) and its subsequent chemical modification. The successful preparations of cation- and anion-exchange PVdF membranes were confirmed via SEM, XPS and thermal analysis. The content of the grafting yield, ion-exchange group, and water uptake was in the range of 30.0~32.3%, 2.81~3.01 mmol/g and 66.6~147%, respectively. The proton conductivity at 20$^{\circ}C$ was in the range of 0.020~0.053 S/cm. From the result, the prepared ionexchange PVdF membrane can be used as a separator in battery cells.
Keywords
PVdF nanofiber membrane; sodium styrene sulfonate; polymerizable access agents; glycidyl methacrylate; radiation-induced graft polymerization; ion-exchange; proton conductivity;
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