Role of interface in highly filled epoxy/BaTiO3 nanocomposites. Part I-correlation between nanoparticle surface chemistry and nanocomposite dielectric property

Xingyi Huang, Liyuan Xie, Ke Yang, Chao Wu, Pingkai Jiang, Shengtao Li, Shuang Wu, Kohei Tatsumi, Toshikatsu Tanaka

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

The interface is critical for the design of polymer nanocomposites with desirable properties. The effect of interface behavior on the properties of polymer nanocomposites with low nanoparticle loading has been well documented. However, our understanding of the role of the interface in highly filled polymer nanocomposites is still limited because of the lack of comprehensive research work. In this contribution, by using BaTiO3 nanoparticles with six kinds of surface chemistry, we have prepared highly filled epoxy nanocomposites (50 vol% nanoparticle loading). The role of nanoparticle surface chemistry on the dielectric properties of epoxy nanocomposites is investigated at a wide frequency and temperature range by using broadband dielectric spectroscopy. Combining the microstructure analysis of the highly filled nanocomposites with a comprehensive X-ray photoelectron spectroscopy characterization of the surface chemistry of the BaTiO3 nanoparticles, an understanding is formed of the correlation between the nanoparticle surface chemistry and the dielectric properties of the nanocomposites. The functional group density, functional group type, and electrical properties of the modifier-the three parameters that are inherent from the nanoparticle surface modification-have a strong impact on the temperature and frequency dependence of the dielectric constant and dielectric loss tangent. This work demonstrates the great importance of surface chemistry in tuning the electrical properties of dielectric polymer nanocomposites.

Original languageEnglish
Article number6783037
Pages (from-to)467-479
Number of pages13
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Volume21
Issue number2
DOIs
Publication statusPublished - 2014 Apr

Keywords

  • Interface
  • dielectric constant
  • dielectric dispersion
  • dielectric loss
  • epoxy
  • nanocomposites

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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