Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 151, Issue -, Pages 44-51Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2017.07.015
Keywords
Graphene; Carbon nanotube; Anisotropic thermal conductivity
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Funding
- Ministry of Science and Technology of the Republic of China, Taiwan [MOST 104-2221-E-007-029-MY3]
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In this study, reduced graphene oxide/multi-walled carbon nanotubes (rGO/CNT) hybrid films were successfully fabricated by vacuum filtration followed by the hydrothermal reduction process. Thermal conductivities in in-plane and through-plane directions of the hybrid films with different CNT loadings are systematically investigated using the laser flash method. Study on the anisotropy of both structural and heat-conductive properties of the hybrid film with 5 wt.% CNT loading, which has been subjected to a hot-press process, reveals a remarkable improvement in in-plane thermal conductivity, from 787.25 W/m.K to 836.80 W/m.K. Moreover, both in-plane and through-plane thermal conductivities of the hybrid film are found to increase with temperature, up to 1224.58 W/m.K at 85 degrees C for in-plane conductivity. With features of good flexibility, high thermal conductivity, and considerable anisotropic thermal property, the hybrid rGO/CNT films therefore show great potentials for heat management applications. (C) 2017 Elsevier Ltd. All rights reserved.
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