Effect of water absorption on dielectric spectrum of nanocomposites

Conference paper (2016)

Authors

R. Kochetov ABB Corporate Research

I.A. Tsekmes DC systems, Energy conversion & Storage -

P.H.F. Morshuis DC systems, Energy conversion & Storage -

J.J. Smit EEMS - General

Andrea Wanner Polymer Competence Center Leoben

Frank Wiesbrock Polymer Competence Center Leoben

Wolfgang Kern Polymer Competence Center Leoben

Research Group

DC systems, Energy conversion & Storage () (TU Delft)

Complex permittivity Dielectric spectroscopy Epoxy Water absorption Nanosilica

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Published Date

2016

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

DC systems, Energy conversion & Storage

Abstract

Many researchers have reported an improvement of the properties of polymer dielectrics by introducing nanofillers. However, the influence of ambient conditions and sample storage under different conditions are often not taken into account. The epoxy matrix itself is a polar polymer susceptible to water absorption, and the presence of hydrophilic nanofillers such as silica will enhance the uptake of moisture from the environment. The dielectric response both of neat epoxy resin and an epoxy-based nanocomposite under an electrical stress greatly depends on the amount of absorbed water. This study investigates the effect of water absorbance on the dielectric spectrum of epoxy-silica nanocomposites containing different concentrations of nanoparticles.