Using SAXS approach to estimate thermal conductivity of polystyrene/zirconia nanocomposite by exploiting strong contrast technique

M. Baniassadi, F. Addiego, A. Laachachi, Said Ahzi, H. Garmestani, F. Hassouna, A. Makradi, V. Toniazzo, D. Ruch

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Abstract

In this study, the effective thermal conductivity of a polymer/ZrO 2 nanocomposite material has been calculated based on small-angle X-ray scattering (SAXS) data. These SAXS results have been used to calculate statistical two-point correlation functions of the nanostructure. A statistical continuum approach based on higher-order correlation functions has been utilized to estimate the effective thermal conductivity of this zirconia-filled polymer. A strong-contrast formulation was used to predict the effective conductivity of the nanocomposite by means of two- and three-point statistical functions with an approximation of the three-point probability functions for a two-phase media. The thermal conductivity of ZrO2 particles is estimated using a semi-inverse application of the strong contrast technique for a buckypaper material sample. Comparison of the simulated results with our experimental results for polystyrene/ZrO2 nanocomposite samples with different volume fractions shows satisfactory agreement. This supports the capability of our proposed methodology to predict effective thermal conductivity of nanocomposites.

Original languageEnglish
Pages (from-to)2742-2748
Number of pages7
JournalActa Materialia
Volume59
Issue number7
DOIs
Publication statusPublished - Apr 2011
Externally publishedYes

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Keywords

  • Analytical methods
  • Nanocomposite
  • Small-angle X-ray scattering
  • Strong contrast statistical approach
  • Thermal conductivity

ASJC Scopus subject areas

  • Ceramics and Composites
  • Metals and Alloys
  • Polymers and Plastics
  • Electronic, Optical and Magnetic Materials

Cite this

Baniassadi, M., Addiego, F., Laachachi, A., Ahzi, S., Garmestani, H., Hassouna, F., Makradi, A., Toniazzo, V., & Ruch, D. (2011). Using SAXS approach to estimate thermal conductivity of polystyrene/zirconia nanocomposite by exploiting strong contrast technique. Acta Materialia, 59(7), 2742-2748. https://doi.org/10.1016/j.actamat.2011.01.013