Organic/inorganic Hybrid Electrolytes for the Application of Direct Methanol Fuel Cell (DMFC) - Preparation and Properties of Sulfonated SEBS (SSEBS)-clay Hybrid Membranes -

직접메탄올 연료전지용 유무기 하이브리드 전해질 - 술폰화된 SEBS (SSEBS)-clay 하이브리드 막의 제조 및 물성 -

  • Nam Sang Yong (Department of Polymer Science and Engineering, Engineering Research Institute, Gyeongsang National University) ;
  • Park Byung-Kil (Department of Chemical Engineering, Hanyang University) ;
  • Kong Sung-Ho (Department of Chemical Engineering, Hanyang University) ;
  • Kim Young Jin (Department of Polymer Science and Engineering, Engineering Research Institute, Gyeongsang National University)
  • 남상용 (경상대학교 공과대학 고분자공학과) ;
  • 박병길 (한양대학교 공과대학 화학공학과) ;
  • 공성호 (한양대학교 공과대학 화학공학과) ;
  • 김영진 (경상대학교 공과대학 고분자공학과)
  • Published : 2005.06.01

Abstract

Sulfonated poly(styrene-ethylene-butadiene-styrene) (SSEBS)-clay hybrid membranes were prepared by solution method. In the preparation of hybrid membrane, the amount of clay content was fixed to 5 phr and montmorillonite (MMT) was fully exfoliated by the SEBS and it was confirmed by X-ray diffraction method. D-spacing of the characteristic peak from MMT plate in WAXD was fully diminished. Gas permeability, mechanical properties and thermal properties of the SSEBS-clay hybrid membranes were investigated. Gas permeability through the SSEBS-clay hybrid membranes decreased due to increased tortuosity made by exfoliation of clay in SEBS.

본 연구에서는 SEBS와 여러 가지의 유기화물로 처리된 MMT type의 clay를 이용하여 SSEBS-clay 하이브리드 막을 용액법으로 제조하였다. clay의 함량은 5 phr로 고정하였다. 용액법을 사용하여 clay를 SEBS에 분산시켰으며, 제조된 SSEBS-clay 하이브리드에서 clay의 특성피크가 완전히 박리되거나 이동하는 XRD 결과로부터 고분자의 clay 층간삽입을 확인하였다. Clay의 종류에 따라서 제조된 SSEBS-clay 하이브리드 막의 가스투과도, 기계적 물성 및 열적 성질을 측정하였다. SSEBS-clay 하이브리드 막은 clay 자체의 도입과 층간거리의 확대로 기체분자의 tortuosity를 증가시켜서 가스투과도를 저하시키는 것을 확인하였다.

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