, Volume 85, Issue 1, pp 25-28
Date: 19 Jul 2006

Thermal transport enhancement of multi-walled carbon nanotubes/ high-density polyethylene composites

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Abstract

Multi-walled carbon nanotubes (MWCNTs) enhanced high-density polyethylene (HDPE) composites were prepared and their thermophysical properties were measured. The thermal diffusivity of the composites increases with the increase in the amount of MWCNTs. A thermal diffusivity of more than three times that of pure HDPE was obtained for 38 vol. % MWCNTs/HDPE composites. An equation based on an effective medium approach model was used to discuss the thermal diffusivity enhancement of MWCNTs/HDPE composites as a function of the volume fraction of MWCNTs. The results from this analysis can be a predictive guideline for further improvements in the thermal transport properties of MWCNTs/HDPE composites. Moreover, the intrinsic longitudinal thermal conductivity kz of an individual MWCNT was deduced from the measured results on the MWCNTs/HDPE composites.

PACS

67.55.Hc; 61.46.Fg; 66.30.Xj