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Journal of Nanomaterials
Volume 2017, Article ID 4838095, 13 pages
https://doi.org/10.1155/2017/4838095
Research Article

Dielectric and Electrical Properties of WS2 Nanotubes/Epoxy Composites and Their Use for Stress Monitoring of Structures

1Shenkar College of Engineering and Design, 52526 Ramat Gan, Israel
2Department of Materials and Interfaces, Weizmann Institute of Science, 76100 Rehovot, Israel

Correspondence should be addressed to S. Kenig; li.ca.raknehs@ginekmas

Received 31 October 2016; Revised 13 January 2017; Accepted 6 April 2017; Published 4 May 2017

Academic Editor: Zafar Iqbal

Copyright © 2017 A. Sedova et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The dielectric and electrical characteristics of the semiconductive WS2 nanotubes/epoxy composites were studied as a function of the nanotubes concentration and the pressure applied during their molding. In addition, the ability of WS2 nanotubes to serve as stress sensors in epoxy based nanocomposites, for health-monitoring applications, was studied. The nanocomposite elements were loaded in three-point bending configuration. The direct current was monitored simultaneously with stress-strain measurements. It was found that, in nanocomposites, above the percolation concentrations of the nanotubes, the electrical conductivity increases considerably with the applied load and hence WS2 nanotubes can be potentially used as sensors for health monitoring of structural components.