In this study, the impact of graphene sheet size on the electrical conductivity of interconnected graphene foam polymer composite is thoroughly investigated. Graphene oxide solution is produced from small flake graphite (SFG) (2-15 mu m) and large flake graphite (LFG) (>100 mu m), respectively. Each solution is used to produce three-dimensional GO foam, which is subsequently heat-treated to produce reduced graphene oxide (RGO) foam. The RGO foams are then infiltrated with poly(dimethylsiloxane) (PDMS) to produce graphene-PDMS (G-PDMS) composites. The in-plane electrical conductivity of the G-PDMS composite (0.4 wt%) from LFG reaches similar to 3.2 S/m, which is more than two orders of magnitude greater than that of G-PDMS (1.9 wt%, 1.4 x 10(-2) S/m) from SFG. This value is also four orders of magnitude higher than that of the G-PDMS composite prepared from mechanical mixing of 4 wt% RGO powder made from SFG with PDMS (4.2 x 10(-5) S/m). The though-plane electrical conductivity followed the same trend for SFG and LFG. This reveals that the interconnected graphene foam supplies more efficient paths for electron transfer inside the polymer than conventional graphene powder and the use of large sized graphene sheets can significantly improve the electrical properties of G-PDMS. (C) 2015 Elsevier Ltd. All rights reserved.
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Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Korea Inst Energy Res, Taejon 305343, South KoreaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Ahn, Wook
;
Song, Hoon Sub
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Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, CanadaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Song, Hoon Sub
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Park, Sang-Hoon
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Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South KoreaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Park, Sang-Hoon
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Kim, Kwang-Bum
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Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South KoreaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Kim, Kwang-Bum
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Shin, Kyoung-Hee
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Korea Inst Energy Res, Taejon 305343, South KoreaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Shin, Kyoung-Hee
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Lim, Sung Nam
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Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Taejon 305701, South KoreaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Lim, Sung Nam
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Yeon, Sun-Hwa
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Korea Inst Energy Res, Taejon 305343, South KoreaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
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Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R ChinaChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
Chen, Zongping
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Xu, Chuan
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Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R ChinaChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
Xu, Chuan
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Ma, Chaoqun
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Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R ChinaChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
Ma, Chaoqun
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Ren, Wencai
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Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R ChinaChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
Ren, Wencai
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Cheng, Hui-Ming
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Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R ChinaChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
机构:
Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Korea Inst Energy Res, Taejon 305343, South KoreaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Ahn, Wook
;
Song, Hoon Sub
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Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, CanadaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Song, Hoon Sub
;
Park, Sang-Hoon
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Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South KoreaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Park, Sang-Hoon
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Kim, Kwang-Bum
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Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South KoreaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Kim, Kwang-Bum
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Shin, Kyoung-Hee
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Korea Inst Energy Res, Taejon 305343, South KoreaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Shin, Kyoung-Hee
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Lim, Sung Nam
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Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Taejon 305701, South KoreaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
Lim, Sung Nam
;
Yeon, Sun-Hwa
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Korea Inst Energy Res, Taejon 305343, South KoreaYonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
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Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R ChinaChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
Chen, Zongping
;
Xu, Chuan
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Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R ChinaChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
Xu, Chuan
;
Ma, Chaoqun
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Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R ChinaChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
Ma, Chaoqun
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Ren, Wencai
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Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R ChinaChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
Ren, Wencai
;
Cheng, Hui-Ming
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Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R ChinaChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China