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Journal of Nanomaterials
Volume 2016, Article ID 1847325, 12 pages
http://dx.doi.org/10.1155/2016/1847325
Research Article

Thermal Conductivity of Carbon Nanoreinforced Epoxy Composites

Applied Mechanics Laboratory, Department of Mechanical Engineering and Aeronautics, University of Patras, University Campus, 26500 Patras, Greece

Received 8 February 2016; Revised 24 April 2016; Accepted 5 May 2016

Academic Editor: Shanxin Xiong

Copyright © 2016 C. Kostagiannakopoulou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The present study attempts to investigate the influence of multiwalled carbon nanotubes (MWCNTs) and graphite nanoplatelets (GNPs) on thermal conductivity (TC) of nanoreinforced polymers and nanomodified carbon fiber epoxy composites (CFRPs). Loading levels from 1 to 3% wt. of MWCNTs and from 1 to 15% wt. of GNPs were used. The results indicate that TC of nanofilled epoxy composites increased with the increase of GNP content. Quantitatively, 176% and 48% increase of TC were achieved in nanoreinforced polymers and nanomodified CFRPs, respectively, with the addition of 15% wt. GNPs into the epoxy matrix. Finally, micromechanical models were applied in order to predict analytically the TC of polymers and CFRPs. Lewis-Nielsen model with optimized parameters provides results very close to the experimental ones in the case of polymers. As far as the composites are concerned, the Hashin and Clayton models proved to be sufficiently accurate for the prediction at lower filler contents.