Research of electrical properties of epoxy composite with carbon fillers

Authors

DOI:

https://doi.org/10.15587/2312-8372.2017.104807

Keywords:

carbon nanotubes, epoxy composite, thermally expanded graphite, resistivity, dielectric constant

Abstract

The object of research in this study is electroconductive epoxy compositions with carbon fillers. Based on the porous structure of the filler, the technology of manufacturing composite materials in the form of films using ultrasound is proposed. The effect of the type and content of the carbon filler on the electrical properties of the epoxy composite is investigated. It is found that the resistivity in the direction perpendicular to the axis of formation of samples with content of thermally expanded graphite (normal and after ultrasonic grinding at room temperature) can reach 7.5∙10-6 Ω∙m, while for carbon nanotubes is 5.1∙10-8 Ω∙m. It is found that the percolation threshold for systems of epoxy resin – thermally expanded graphite is ~ 5 wt. %, and for epoxy resin systems – carbon nanotubes is ~ 1 wt. %. Research results of the effect of carbon filler on the dielectric properties of epoxy composite are presented. It is experimentally established that as the filler concentration increases, the dielectric constant increases in the polymer matrix. A sharp increase in the dielectric constant of research systems is observed with a CNT concentration of 1%. An increase in the dielectric losses of the orientational polarization is observed as the frequency of the alternating current increases to 105 Hz.

Author Biography

Liubov Melnуk, National Technical University of Ukraine «Ihor Sikorsky Kyiv Polytechnic Institute», 37, Victory ave., Kyiv, Ukraine, 03056

PhD, Senior Lecturer

Department of Chemical Technology of Composites

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Published

2017-05-30

How to Cite

Melnуk L. (2017). Research of electrical properties of epoxy composite with carbon fillers. Technology Audit and Production Reserves, 3(1(35), 28–34. https://doi.org/10.15587/2312-8372.2017.104807

Issue

Vol. 3 No. 1(35) (2017): Industrial and Technology Systems

Section

Materials Science: Original Research

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Copyright (c) 2017 Liubov Melnуk

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