A facile route to fabricate thermally conductive and electrically insulating polymer composites with 3D interconnected graphene at an ultralow filler loading

Nanoscale
Shiqiang SongYong Zhang

Abstract

Thermally conductive polymer composites show attractive prospects as thermal management materials in many applications such as microelectronic devices. However, traditional approaches in the preparation of thermally conductive polymer composites usually have the disadvantages of complex processes. In this study, a facile method for highly thermally conductive silicone rubber composites is reported, based on 3D interconnected graphene sponges by using an inorganic salt as a sacrificial template. The composites exhibit a high thermal conductivity of 1.50 W m-1 k-1 and a thermal conductivity enhancement of 752% at a very low graphene loading of 1.46 wt%. More significantly, highly thermally conductive epoxy and styrene-butadiene rubber composites are also fabricated by the same method. The composites also show excellent electrical insulating properties (>1013 Ω cm). Thus, this effective method is proved to be widely used for the facile fabrication of polymer composites of both plastic and rubber matrices which are thermally conductive and have excellent electrical insulating properties.

References

Feb 21, 2008·Nano Letters·Alexander A BalandinChun Ning Lau
Jan 28, 2009·ACS Applied Materials & Interfaces·Darrel UnterekerLance Lohstreter
Aug 1, 2009·Nature Chemistry·Wei GaoPulickel M Ajayan
Jul 23, 2011·Nature Materials·Alexander A Balandin
Jan 5, 2012·Nano Letters·Khan M F Shahil, Alexander A Balandin
Feb 6, 2015·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Mohammed J MezianiYa-Ping Sun
Jan 21, 2017·Reports on Progress in Physics·Denis L Nika, Alexander A Balandin
Oct 10, 2018·ACS Applied Materials & Interfaces·Fariborz KargarAlexander A Balandin

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Methods Mentioned

BETA
chemical vapor deposition
infrared spectroscopy
X-ray
scanning electron microscopy
AFM
energy dispersive spectrometry

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