화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.37, No.5, 638-641, September, 2013
Export Citation
Graphite Nanosheets/PVDF 복합체의 열전 성질
Thermoelectric Properties of Graphite Nanosheets/Poly(vinylidene fluoride) Composites
윤호동1, 2, 남승웅1, 응우옌두1, 3, 김대흠2, 김희숙1, 3, †
  • 1한국과학기술연구원 광전하이브리드연구센터
  • 2광운대학교 화학공학과
  • 3과학기술연합대학원대학교
Ho Dong Yoon1, 2, Seungwoong Nam1, Nguyen D. K. Tu1, 3, Daeheum Kim2, and Heesuk Kim1, 3, †
  • 1Photo-electronic Hybrids Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Korea
  • 2Department of Chemical Engineering, Kwangwoon University, Seoul 139-701, Korea
  • 3University of Science and Technology (UST), Daejeon 305-333, Korea
E-mail:
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 μV/K로 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.
Keywords:graphite nanosheets;poly(vinylidene fluoride);nanocomposites;thermoelectric properties.
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