4.7 Article

On the electrical conductivity of composites with a polymeric matrix and a non-uniform concentration of carbon nanotubes

Journal

COMPOSITES SCIENCE AND TECHNOLOGY
Volume 188, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2020.108003

Keywords

Carbon nanotubes; Electrical properties; multiscale modelling; Dispersion

Funding

  1. European Union [642890]
  2. Marie Curie Actions (MSCA) [642890] Funding Source: Marie Curie Actions (MSCA)

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We present a multiscale modelling approach to explore the effects of a non-uniform concentration of carbon nanotubes (CNTs) on the electrical conductivity of CNT-polymer composites. Realistic three-dimensional representative volume elements (RVEs) are generated from a two-dimensional CNT concentration map, obtained via microscopy techniques. The RVEs capture the measured probability density function of the CNT concentration and include a length-scale to represent the details of the spatial distribution of the concentration. The homogenized conductivity of the RVEs is computed via multiscale FE analyses for different values of such length-scale, and it is compared to measurements. The modelling strategy is then used to explore the effects of the microstructural features of these materials on their electrical conductivity.

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