Journal
PURE AND APPLIED CHEMISTRY
Volume 86, Issue 5, Pages 765-774Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/pac-2013-1207
Keywords
carbon nanotubes; electrical networks; electrical properties; graphene oxide; manufacture; nano-composites; NMS-IX; permittivity
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In this paper we present characterization data for carbon nanotube (CNT)-epoxy and thermally reduced graphene oxide (TRGO)-epoxy nano-composites. The frequency-dependent ac conductivity and permittivity are examined as a function of volume fraction of carbon-based filler. The measured electrical properties and their frequency dependency are evaluated on the basis that such composites can be considered as a network of resistors and capacitors, whereby the resistors represent the conductive component (CNT or TRGO) and the capacitors are the insulating component (epoxy matrix). Differences observed between the frequency-dependent electrical properties of the CNT-epoxy and TRGO-epoxy composites are explained in terms of the different electrical conductivities of the CNT and TRGO phase.
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