Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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PVA/Silica Hybrid Membrane Containing Sulfonic Acid Croup for Direct Methanol Fuel Cells Application

Sulfonic acid group을 갖는 PVA/Silica Hybrid막의 DMFC 응용

  • Young Moo Lee (National Research Laboratory for Membranes, School of Chemical Engineering, College of Engineering, Hanyag University) ;
  • Dae Sik Kim (National Research Laboratory for Membranes, School of Chemical Engineering, College of Engineering, Hanyag University) ;
  • Kwang Ho Shin (National Research Laboratory for Membranes, School of Chemical Engineering, College of Engineering, Hanyag University) ;
  • Ho Bum Park (National Research Laboratory for Membranes, School of Chemical Engineering, College of Engineering, Hanyag University) ;
  • Ji Won Rhim (Department of Chemical Engineering, Hannam University)
  • Published : 2003.06.01
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Abstract

In the present study, crosslinked poly(vinyl alcohol) (PVA) membranes were prepared at various crosslinking agent content using sulfosuccinic acid (SSA) containing sulfonic acid group ($SO_3H)$. To reduce methanol permeability, silica was introduced to the membrane using sol-gel process. The hybrid membranes were studied in relation to proton conductivity and methanol permeability. It was found that both these properties were very dependent on the effect of SSA content as a crosslinking agent and as a donor of hydrophilic $SO_3H)$ group. The proton conductivities of these PVA/SSA/Silica membranes are in the range from $10^{-3}\;to\;10^{-2}$S/cm and the methanol permeabilities are in the range from $10^{-8}\;to\;10^{-7}\;cm^2/sec$.

본 연구에서는 설폰기를 함유한 sulfosuccinic acid를 가교제로 사용하였다. 또한, 메탄을 투과도를 줄이기 위해 실리카를 졸-겔 방법을 사용하여 성장시킨 PVA/Silica 하이브리드막을 제조하여 수소 이온 전도도 및 메탄을 투과도에 관하여 연구하였다. 수소 이온 전도도 및 메탄을 투과도는 가교제 농도 및 친수성 $SO_3H$의 함량에 영향을 받았으며, 제조된 막의 수소 이온 전도도는 10^{-3}~10^{-2}$ S/cm 범위에 있었고, 메탄을 투과도는 $10^{-8}~10^{-7}\;cm^2/s$ 를 갖는다.

Keywords

References

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