Interfacial effects on the electrical behavior of elastomer nanoparticulate composites

Amira Meddeb, Zoubeida Ounaies, Oscar Lopez-Pamies

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Polymer nanocomposites exhibit unique effective properties that do not follow conventional effective media approaches. The nanoparticle-polymer interphase has been shown to strongly influence the nanocomposites behavior due to its significant volume when the particles are nano-sized, affording an opportunity to tune the dielectric response of the resulting nanocomposite. In this study, we investigate the effects of TiO2 nanoparticles on the electrical properties and the charges distribution and transport in polydimethylsiloxane (PDMS) nanocomposites. Impedance spectroscopy shows suppression of interfacial Maxwell-Wagner-Sillars (MWS) polarization accompanied by a reduction in the low frequency dielectric permittivity and loss at high temperatures in the presence of the TiO2 nanoparticles. Thermally stimulated discharge current measurements confirm that the suppression of the interfacial polarization relaxations happens by redistributing or depleting the charges through the composite and hindering their mobility, potentially resulting in lower electrical conduction and higher breakdown strength. Although the model materials investigated here are TiO2 nanoparticles and Sylgard 184 PDMS, our findings can be extended to other nanoparticulate-filled elastomer composites to design lightweight dielectrics, actuators and sensors with improved capabilities.

Original languageEnglish (US)
Title of host publicationBehavior and Mechanics of Multifunctional Materials XIII
EditorsHani E. Naguib
PublisherSPIE
ISBN (Electronic)9781510625914
DOIs
StatePublished - Jan 1 2019
EventBehavior and Mechanics of Multifunctional Materials XIII 2019 - Denver, United States
Duration: Mar 4 2019Mar 6 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10968
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceBehavior and Mechanics of Multifunctional Materials XIII 2019
CountryUnited States
CityDenver
Period3/4/193/6/19

Keywords

  • Interfacial effects
  • elastomer nanocomposites
  • electrical properties
  • thermally stimulated depolarization currents

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Meddeb, A., Ounaies, Z., & Lopez-Pamies, O. (2019). Interfacial effects on the electrical behavior of elastomer nanoparticulate composites. In H. E. Naguib (Ed.), Behavior and Mechanics of Multifunctional Materials XIII [109680I] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10968). SPIE. https://doi.org/10.1117/12.2515364