Journal of Energy Engineering (에너지공학)

The Korean Society for Energy (한국에너지학회)
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Poly(arylene ether ketone) block copolymer prepared through sulfonation process for polymer electrolyte membrane fuel cell

술폰화 공정을 통해 제조한 고분자 전해질형 연료전지용 폴리(아릴렌 이서 케톤) 블록 코폴리머

  • Jang, Hyeri (Graduate school, Department of Energy Storage.Conversion Engineering, R&D Education Center for Fuel Cell System-Whole Life Cycle R&D, and Hydrogen & Fuel Cell Research Center, Chonbuk National University) ;
  • Nahm, Keesuk (Graduate school, Department of Energy Storage.Conversion Engineering, R&D Education Center for Fuel Cell System-Whole Life Cycle R&D, and Hydrogen & Fuel Cell Research Center, Chonbuk National University) ;
  • Yoo, Dongjin (Graduate school, Department of Energy Storage.Conversion Engineering, R&D Education Center for Fuel Cell System-Whole Life Cycle R&D, and Hydrogen & Fuel Cell Research Center, Chonbuk National University)
  • 장혜리 (전북대학교 대학원, 공과대학교 에너지저장.변환공학과, 연료전지 시스템 전주기 R&D 고급트랙 사업단 및 수소연료전지센터) ;
  • 남기석 (전북대학교 대학원, 공과대학교 에너지저장.변환공학과, 연료전지 시스템 전주기 R&D 고급트랙 사업단 및 수소연료전지센터) ;
  • 유동진 (전북대학교 대학원, 공과대학교 에너지저장.변환공학과, 연료전지 시스템 전주기 R&D 고급트랙 사업단 및 수소연료전지센터)
  • Received : 2016.08.11
  • Accepted : 2016.09.19
  • Published : 2016.09.30
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Abstract

In this study, a sulfonated poly(arylene ether ketone) block copolymer was prepared from hydrophilic oligomer and hydrophobic oligomer. The structure of the prepared membrane was characterized by $^1H$-NMR, FT-IR and GPC. The $M_w$(weight-average molecular weights) of the polymer was $209,700g\;mol^{-1}$ and the molecular weight distribution($M_w/M_n$) of 1.25 was obtained. The prepared membrane showed excellent thermal stability with gradual weight loss up to $200^{\circ}C$. The proton conductivity of SPAEK block copolymer reached the maximum of $9.0mS\;cm^{-1}$ at $90^{\circ}C$ under 100% relative humidity (RH). From the observed results, it is necessary to do more aggressive attempt to study the possibility of application as an ion-conductive composite electrolyte.

본 연구에서는 술폰화된 sodium 5,5'-carbonylbis(2-fluorobenzene sulfonate) 단량체를 이용하여 친수성 올리고머를 합성한 뒤 소수성 올리고머와 1:1로 공중합반응을 시켜 sulfonated poly(arylene ether ketone) (SPAEK) 공중합체를 합성하였다. 제조한 공중합체의 구조 분석은 $^1H$-NMR, FT-IR, GPC를 사용하여 실시하였고, GPC에서 공중합체의 평균분자량은 $209,700g\;mol^{-1}$, 다분산지수(PDI)는 1.25이었다. 열적 안정성을 확인하기 위하여 TGA 분석을 실시하였고, $200^{\circ}C$이상에서의 열 안정성을 확인하였다. 고분자 전해질 막의 양이온 전도도는 상대습도 100%, $80^{\circ}C$의 온도에서 약 $9.0mS\;cm^{-1}$이었다. 측정된 결과로부터 본 연구에서 제조한 탄화수소계 전해질 막은 술폰화 정도를 증가시키거나 약간의 구조적 변형을 통해 연료전지용 고분자 전해질 막으로 적용 가능할 것으로 기대된다.

Keywords

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