Issue 38, 2013
From the journal:

RSC Advances

Alumina-coated graphene sheet hybrids for electrically insulating polymer composites with high thermal conductivity†

Rong Qian,a   Jinhong Yu,*bc   Chao Wu,a   Xing Zhaia  and  Pingkai Jiang*a  

* Corresponding authors

a Department of Polymer Science and Engineering and Shanghai Key Lab of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China
E-mail: pkjiang@sjtu.edu.cn

b Ningbo Institute of Material Technology & Engineering, Chinese Academy of Sciences, Ningbo, China
E-mail: yujinhong@glut.edu.cn

c Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Material Science and Engineering, Guilin University of Technology, Guilin 541004, China

Abstract

Graphene has attracted considerable attention as a promising candidate to improve the thermal conductivity of polymers owing to its extremely high intrinsic thermal conductivity (∼5300 W m−1 K). However, graphene-based composites show a high electrical conductivity even with a low loading of fillers, which greatly limits their applications in electronic devices. Herein, we present a new class of fillers of alumina-coated graphene sheet (GS@Al2O3) hybrid fillers via an electrostatic self-assembly route. This unique structural design combines the advantages of both the GS and Al2O3, resulting in PVDF/GS@Al2O3 composites that show not only high thermal conductivity, but also retain high electrical insulation. For instance, the thermal conductivity of PVDF composites with 40 wt% GS@Al2O3 is up to 0.586 W m−1 K and the volume resistivity is above 4 × 1014 Ω cm. Moreover, this self-assembly route is a simple and scalable strategy for fabricating high performance thermally conductive materials.

Graphical abstract: Alumina-coated graphene sheet hybrids for electrically insulating polymer composites with high thermal conductivity

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Article information

DOI
https://doi.org/10.1039/C3RA42104J
Article type
Paper
Submitted
02 May 2013
Accepted
17 Jul 2013
First published
23 Jul 2013

RSC Adv., 2013,3, 17373-17379

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Alumina-coated graphene sheet hybrids for electrically insulating polymer composites with high thermal conductivity

R. Qian, J. Yu, C. Wu, X. Zhai and P. Jiang, RSC Adv., 2013, 3, 17373 DOI: 10.1039/C3RA42104J

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