Synergistic improvement of thermal conductivity in polymer composites filled with pitch based carbon fiber and graphene nanoplatelets

Authors
Noh, Ye JiKim, Seong Yun
Issue Date
2015-08
Publisher
ELSEVIER SCI LTD
Citation
POLYMER TESTING, v.45, pp.132 - 138
Abstract
We found that the thermal conductivity of composite materials was synergistically enhanced by the simultaneous incorporation of well-dispersed pitch-based carbon fibers (PCFs) and graphene nanoplatelets (GNPs) into the matrix. Accordingly, this study investigated the causes of such enhancement and attempted to optimize the thermal conductivity. The solvent-free composites fabrication method based on powder mixing and in-situ polymerization proposed recently was employed to achieve a uniform dispersion of fillers of different sizes and shapes. The isotropic and in-plane thermal conductivity of the composite containing both uniformly dispersed 5 wt% of PCF and 15wt% of GNP achieved improvements of 82% and 183% when compared to those containing 20 wt% of GNP, and improvements of 65% and 74% when compared to those containing 20 wt% of PCF, respectively. The synergistic improvement of the thermal conductivity was maximized at the optimized composition due to the most efficient formation of thermally-conductive pathways and internal structures favorable for phonon transport. (C) 2015 Elsevier Ltd. All rights reserved.
Keywords
THERMOPLASTIC COMPOSITES; MECHANICAL-PROPERTIES; THEORETICAL APPROACH; BORON-NITRIDE; DISPERSION; FABRICATION; MATRIX; HEAT; THERMOPLASTIC COMPOSITES; MECHANICAL-PROPERTIES; THEORETICAL APPROACH; BORON-NITRIDE; DISPERSION; FABRICATION; MATRIX; HEAT; Polymer composite; Thermal conductivity; Carbon fiber; Graphene nanoplatelet; Cyclic butylene terephthalate
ISSN
0142-9418
URI
https://pubs.kist.re.kr/handle/201004/125187
DOI
10.1016/j.polymertesting.2015.06.003
Appears in Collections:
KIST Article > 2015
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