Macromolecular Research

  • 제15권5호
  • /
  • Pages.459-464
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  • 2007
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  • 1598-5032(pISSN)
  • /
  • 2092-7673(eISSN)
한국고분자학회 (The Polymer Society of Korea)
권호 표지

Sulfonated Dextran/Poly(vinyl alcohol) Polymer Electrolyte Membranes for Direct Methanol Fuel Cells

  • Won, Jong-Ok (Department of Applied Chemistry, Sejong University) ;
  • Ahn, Su-Mi (Department of Applied Chemistry, Sejong University) ;
  • Cho, Hyun-Dong (Department of Applied Chemistry, Sejong University) ;
  • Ryu, Ji-Young (Fuel Cell Research Center, Korea Institute of Science and Technology) ;
  • Ha, Heung-Yong (Fuel Cell Research Center, Korea Institute of Science and Technology) ;
  • Kang, Yong-Soo (Division of Chemical Engineering, Hangyang University)
  • 발행 : 2007.08.31
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초록

Polymer electrolyte membranes, featuring ionic channels, were prepared from sulfonated dextran/ poly(vinyl alcohol) (sD/PVA) membranes. A stiff sulfated dextran was chosen as the route for ionic transport, since ionic sites are located along the stiff dextran main chain. The sD/PVA blend membranes were annealed and then chemically crosslinked. The characteristics of the crosslinked sD/PVA membranes were investigated to determine their suitability as proton exchange membranes. The proton conductivity was found to increase with increasing amounts of sD inside the membrane, which reached a maximum and then decreased when the sD content exceeded 30 wt%, while the methanol permeability increased with increasing sD content. The good dispersion of sD inside the membrane, which serves as an ionic channels mimic, played a significant role in proton transportation.

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