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Effect of homogeneous Al(OH)3 covered MWCNT addition on the thermal conductivity of Al2O3/epoxy-terminated poly(dimethylsiloxane) composites

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Abstract

Aluminum hydroxide covered multiwalled carbon nanotubes (A-MWCNTs) were synthesized as a conducting additive to alumina-epoxy-terminated poly(dimethylsiloxane). The measured diffusivity and calculated conductivity exhibited dissimilar behavior between several Al2O3 concentrations as a function of A-MWCNT loading, which correlated with the interface density and interconnectivity of the structures. The fabricated heterostructured A-MWCNT did not have a significant effect on the thermal conductivity of the composite because of phonon scattering at the interface. A small amount of A-MWCNT was feasible for establishment of a heat conductive percolating network with the greatest enhancement of thermal conductivity and diffusivity at an A-MWCNT loading of 1.0 and 2.0 wt%. Continuously increasing thermal transport properties were observed with the 49.1 vol.% Al2O3 loading which derived from a lower interface density nanowire and polymer matrix with enhanced interconnectivity.

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Acknowledgements

This work (Grants No. 000453110111) was supported by Business for Cooperative R&D between Industry, Academy, and Research Institute funded Korea Small and Medium Business Administration in 2011.

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Authors and Affiliations

  1. School of Chemical Engineering & Materials Science, Chung-Ang University, Seoul, 156-756, Korea

    Hyungu Im & Jooheon Kim

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  1. Hyungu Im
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  2. Jooheon Kim
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Correspondence to Jooheon Kim.

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Im, H., Kim, J. Effect of homogeneous Al(OH)3 covered MWCNT addition on the thermal conductivity of Al2O3/epoxy-terminated poly(dimethylsiloxane) composites. J Mater Sci 47, 6025–6033 (2012). https://doi.org/10.1007/s10853-012-6510-3

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  • DOI: https://doi.org/10.1007/s10853-012-6510-3

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