Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Preparation and Characterization of Ion-exchange Membrane Using sPEEK for Fuel Cell Application

Sulfonated-PEEK를 이용한 연료전지용 이온교환막의 제조 및 특성평가

  • Jang, Won-Gi (Department of Chemical System Engineering, Keimyung University) ;
  • Ye, Se-Hui (Department of Chemical System Engineering, Keimyung University) ;
  • Kang, Seung-Kyu (Department of Transportation Engineering, Keimyung University) ;
  • Kim, Ji-Tae (Department of Environmental and Energy Systems Engineering, Kyonggi University) ;
  • Byun, Hong-Sik (Department of Chemical System Engineering, Keimyung University)
  • 장원기 (계명대학교 화학시스템공학과) ;
  • 예세희 (계명대학교 화학시스템공학과) ;
  • 강승규 (계명대학교 교통공학과) ;
  • 김지태 (경기대학교 환경에너지시스템공학과) ;
  • 변홍식 (계명대학교 화학시스템공학과)
  • Received : 2011.09.06
  • Accepted : 2011.09.26
  • Published : 2011.09.30
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Abstract

A nascent membrane was prepared by using the solution evaporation method with a solution of sPEEK, EdAn (cross-linking reagent), and PEA (grafting reagent) in DMAc. Then, after the imination and sulfonation process the cross-linked and grafted ion-exchange membrane, CG-sPEEK, was obtained. The sulfonation and imination reactions were confirmed by FTIR analysis. In order to evaluate the possibility of prepared membrane for the use of an ion-exchange membrane in PEMFC, proton conductivity, water uptake and volume change were measured and compared with a commercial membrane, Nafion 115. It was revealed that since the proton conductivity (0.17 S/cm) of prepared membrane were much higher than those of Nafion 115 (0.10 S/cm) the prepared membrane could be used for the ion-exchange membrane in PEMFC. However, the high water uptake (130%) of CG-sPEEK should be reduced for the dimension stability.

기질 고분자인 sulfonated PEEK (sPEEK)와 가교제(cross-linking reagent) 4,4'-ethyldianiline (EdAn), 그래프트제(grafting reagent) 2-phenylethylamine (PEA)을 용매 dimethylacetamide (DMAc)에 녹여 용매증발법을 이용하여 제막하였다. 이민화 반응(imination)과 술폰화(sulfonation) 과정을 거쳐 최종 이온교환막인 cross-linked and grafted sPEEK (CG-sPEEK)막을 제조하였다. FT-IR 분석을 통해 술폰화 및 이민화 반응여부를 확인할 수 있었다. Proton conductivity와 water uptake, volume change를 측정하여 상용화된 Nafion115와 비교함으로써 이온교환막으로서의 활용가능성을 평가하였다. 제조된 CG-sPEEK막의 proton conductivity (0.17 S/cm) 값이 Nafion115 (0.10 S/cm) 보다 우수하게 나타나 이온교환막으로서의 적용가능성을 보여주었다. 다만 높은 water uptake (130%)는 CG-sPEEK의 치수안정성을 위해서 저감시킬 필요가 있다.

Keywords

References

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