폴리머 (Polymer(Korea))

  • 제37권5호
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  • Pages.638-641
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  • 2013
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  • 0379-153X(pISSN)
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  • 2234-8077(eISSN)
한국고분자학회 (The Polymer Society of Korea)
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Graphite Nanosheets/PVDF 복합체의 열전 성질

Thermoelectric Properties of Graphite Nanosheets/Poly(vinylidene fluoride) Composites

  • 윤호동 (한국과학기술연구원 광전하이브리드연구센터) ;
  • 남승웅 (한국과학기술연구원 광전하이브리드연구센터) ;
  • 응우옌 두 (한국과학기술연구원 광전하이브리드연구센터) ;
  • 김대흠 (광운대학교 화학공학과) ;
  • 김희숙 (한국과학기술연구원 광전하이브리드연구센터)
  • Yoon, Ho Dong (Photo-electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST)) ;
  • Nam, Seungwoong (Photo-electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST)) ;
  • Tu, Nguyen D.K. (Photo-electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST)) ;
  • Kim, Daeheum (Department of Chemical Engineering, Kwangwoon University) ;
  • Kim, Heesuk (Photo-electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST))
  • 투고 : 2013.05.10
  • 심사 : 2013.05.28
  • 발행 : 2013.09.25
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초록

유연 열전소자를 제조하기 위한 열전재료로서, graphite nanosheet(GNS)와 poly(vinylidene fluoride) (PVDF)를 복합화하여 GNS/PVDF 복합체를 제조하였다. GNS의 함량에 따른 전기전도도, 열전도도, 지벡상수를 측정하여 열전성능을 확인하였다. GNS의 함량이 10에서 70 wt%로 증가하면서 전기전도도는 389에서 1512 S/m로 향상되는 결과를 보였다. 복합체의 전기전도도가 크게 증가하는 반면에 지벡 상수는 26.7에서 31.2 ${\mu}V/K$로 큰 변화를 보이지 않았으며, 열전도도 역시 0.24 W/m K를 유지하면서 변화를 보이지 않았다. 고분자와의 복합화를 통하여 GNS 자체의 높은 열전도도를 낮춤으로써 향상된 열전성능을 갖는 열전재료를 제조할 수 있었다.

GNS/PVDF composites were prepared using graphite nanosheets (GNS) and poly(vinylidene fluoride) (PVDF) for flexible thermoelectric application. We measured the electrical conductivity, thermal conductivity and Seebeck coefficient of GNS/PVDF composites with different contents of GNS and then evaluated the thermoelectric properties of GNS/PVDF composites. The electrical conductivity of GNS/PVDF composites increased from 389 to 1512 S/m with increasing the content of GNS from 10 to 70 wt%. While the electrical conductivity dramatically increased, Seebeck coefficient and thermal conductivity did not show any big difference as the content of GNS increases. In this study, we demonstrated that GNS/PVDF composites improved the thermoelectric properties by decreasing the thermal conductivity due to the phonon scattering at the interfaces between polymer and GNS nanoplatelets.

키워드

과제정보

연구 과제 주관 기관 : 지식경제부

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