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Issue 25, 2017
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Solvent evaporation induced self-assembly of graphene foam for thermally conductive polymers

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Abstract

Graphene, a new carbon material with the highest thermal conductivity (TC) in known materials, is a good candidate for polymer-based thermally conductive material applications. However, the homogeneous dispersion of graphene and effective construction of graphene-based thermally conductive network in the polymer matrix still remains a big challenge. In this paper, we report an effective way to avoid aggregation of graphene in polymers through the fabrication of 3D porous graphene foam (GF) in advance by a simple solvent evaporation induced self-assembly method. The as-prepared GF is proved to be an effective thermally conductive network after the epoxy perfusion, giving rise to a high TC of 11.58 W (m−1 K−1) for the GF/epoxy composite. In addition, anisotropic TC in the GF/epoxy composites is observed because of the oriented arrangement of graphene sheets in the GF due to solvent evaporation. Besides, further improvement of TC to 16.69 W (m−1 K−1) can be achieved by addition of polyvinyl pyrrolidone (PVP) during the preparation of GF, which can be ascribed to the reduction of interfacial thermal resistance by amorphous carbon generated from pyrolysis of PVP.

Graphical abstract: Solvent evaporation induced self-assembly of graphene foam for thermally conductive polymers

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Supplementary files

Article information


Submitted
09 Feb 2017
Accepted
03 Mar 2017
First published
08 Mar 2017

This article is Open Access

RSC Adv., 2017,7, 15469-15474
Article type
Paper

Solvent evaporation induced self-assembly of graphene foam for thermally conductive polymers

J. Ma, X. Zhou, S. Ding and Z. Liu, RSC Adv., 2017, 7, 15469
DOI: 10.1039/C7RA01670K

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

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    [Original citation] - Published by The Royal Society of Chemistry.

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