Document Type

Article

Publication Date

2012

Journal or Book Title

Composites Science and Technology

Volume

72

Issue

14

First Page

1692

Last Page

1696

DOI

10.1016/j.compscitech.2012.06.023

Abstract

Polymer-matrix composites (PMCs) with dispersed Si nanoparticles have been fabricated and investigated for their dielectric and mechanical properties for the first time. It is found that Si nanofillers significantly enhance the dielectric constant of the nanocomposites while preserve the low loss tangent of the Bisphenol E cyanate ester (BECy) matrix. Meanwhile, incorporation of Si nanoparticles effectively stiffens the polymer, as manifested by the large increase in the storage modulus. Furthermore, the AC conductivity of the composite is observed to decrease under compressive mechanical stresses due to the piezoresistive effect of Si. Therefore, these novel Si/BECy nanocomposites simultaneously display mechanical load-carrying, electric energy-storing and stress-sensing capabilities, very promising for multifunctional devices such as structural capacitors.

Comments

NOTICE: this is the author’s version of a work that was accepted for publication in Composites Science and Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composites Science and Technology, [72, (2012] DOI: 10.1016/j.compscitech.2012.06.023.

Copyright Owner

Sun, et al.

Language

en

File Format

application/pdf

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