Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Preparation and Characterization of ion Exchange Membrane for Direct Methanol Fuel Cell(DMFC) Using Sulfonated Polysulfone

설폰화 폴리설폰을 이용한 직접메탄올연료전지용 이온교환막의 제조 및 특성 연구

  • 신현수 (한남대학교 공과대학 화학공학과) ;
  • 이충섭 (한남대학교 공과대학 화학공학과) ;
  • 전지현 (한남대학교 공과대학 화학공학과) ;
  • 정선영 (한남대학교 공과대학 화학공학과) ;
  • 임지원 (한남대학교 공과대학 화학공학과) ;
  • 남상용 (국립경상대학교 공과대학 고분자공학과)
  • Published : 2002.12.01
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Abstract

In order to develop the ion exchange membranes which would be used in direct methanol fuel cell (DMFC), the polysulfone polymer was sulfonated using chlorosulfonic acid (CSA) and trimethylchlorosilane(TMCS). It has been characterized in terms of ion conductivities, methanol crossover, swelling degree and ion exchange capacities for the heat untreated and treated membranes at $150^{\circ}C.$ Typically, the methanol permeability and ion conductivity at the mole ratio of 1.4 between polysulfone repeating unit and sulfonating agents showed $2.87{\times}10^{-7}\; cm^2/s$(without heat treatment), $1.52{\times}10^{-7}\; cm^2/s$(with heat treatment) and $1.10{\times}10^{-2}\; S/cm$(without heat treatment), $0.87{\times}10^{-2}\;$ S/cm(with heat treatment), respectively. After the mole ration of 1.4 both values indicated mild increase.

직접메탄올연료전지에 사용가능한 이온교환막을 개발하기 위하여 본 연구에서는 폴리설폰을 설폰화시켜 양이온교환막을 제조하였고 그에 대한 특성을 $150^{\circ}C$에서 열처리 전과 후를 통해 메탄을 투과도, 이온전도도, 이온교환용량 그리고 함수율 등에 대하여 평가하였다. 폴리설폰 고분자의 단량체와 설폰화제의 몰비가 1.4일 때 메탄올 투과도는 $2.87{\times}10^{-7} \;cm^2/s$(열처리 안함), $1.52{\times}10^{-7}\; cm^2/s$(열처리함)과 이온전도도는 1.10{\times}10^{-2}\; S/cm$ (열처리안함), 0.87{\times}10^{-2}\; S/cm$(열처리함)을 각각 보여 주었다. 그 이후의 몰비에서는 거의 증가하지 않았으며, 이러한 경향은 함수율과 이온교환용량에서도 같은 경향을 보여주었다.

Keywords

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