Interface properties influence the effective dielectric constant of composites

Abstract

In this work we propose a micromechanics model, based on the composite spheres assemblage method, for studying the electrostatic behaviour of particle and porous composites when the interface between the particle (or the pore) and the matrix has its own independent behaviour. Examples from experimental results in porous media and particle composites are utilized to demonstrate the model’s capabilities. The current model shows a better agreement with experiments compared with other available studies. Furthermore, it is shown that the interface dielectric constant is independent of the experiments which prove its nature as a material parameter.

Keywords:

• coating
• nanocomposites
• electrical properties
• fibre/matrix bond
• interface

Acknowledgements

The support of this work by the ERC Advanced Grant MOCOPOLY is gratefully acknowledged. The first author would like to acknowledge the support by the King Abdullah University of Science and Technology (KAUST) Center for Numerical Porous Media.

Notes

No potential conflict of interest was reported by the authors.

1 The label energetic denotes that the interface possesses electrical and constitutive structures. These structures are independent from those of the bulk.