Thermal conductivity and interfacial resistance in single-wall carbon nanotube epoxy composites
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- 12 October 2005
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 87 (16) , 161909
- https://doi.org/10.1063/1.2103398
Abstract
We report thermal conductivity measurements of purified single-wall carbon nanotube(SWNT) epoxy composites prepared using suspensions of SWNTs in N-N-Dimethylformamide (DMF) and surfactant stabilized aqueous SWNTsuspensions.Thermal conductivity enhancement is observed in both types of composites. DMF-processed composites show an advantage at SWNT volume fractions between ϕ ∼ 0.001 to 0.005. Surfactant processed samples, however, permit greater SWNT loading and exhibit larger overall enhancement ( 64 ± 9 ) % at ϕ ∼ 0.1 . The enhancement differences are attributed to a ten-fold larger SWNT/solid-composite interfacial thermal resistance in the surfactant-processed composites compared to DMF-processed composites. The interfacial resistance is extracted from the volume fraction dependence of the thermal conductivity data using effective medium theory. [C. W. Nan, G. Liu, Y. Lin, and M. Li, Appl. Phys. Lett.85, 3549 (2004)].Keywords
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