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A three-phase theoretical model is proposed that is suitable for describing the effective permittivity of polymer-matrix composites containing spherical nanoparticles. The model accounts for the presence of an interphase region, which surrounds each nanosphere, whose permittivity is allowed to be different from that of the matrix polymer. The nanoparticles themselves are approximated as hard (non-overlapping)...
Silicon/epoxy nanocomposites were synthesized in order to investigate potential improvement of electrical energy storage capability and mechanical properties of epoxy resin on addition of Si nanospheres. Nanospheres with mean diameter 130 nm were homogenized within epoxy monomers at 5 and 10 wt.%. The dielectric behavior of the resulting nanocomposites was investigated using broadband dielectric spectroscopy...
Novel composites performing both dielectric and mechanical functions have a potential application in vehicle structures of both energy storage and load bearing capacity, leading to reduction in weight and associated energy costs. Multifunctional silicon nanoparticles/bisphenol E cyanate ester (Si/BECy) nanocomposites were synthesized and their dielectric properties were investigated. Si nanospheres,...
A polymer-ceramic nanocomposite is studied as a candidate for structural dielectric devices in aerospace applications. A pre-imidized polyimide powder was chosen for its excellent mechanical properties at elevated temperatures, while barium titanate (BaTiO3) nanoparticles with a nominal diameter of 60 nm were dispersed in the matrix for the intended purpose of increasing the permittivity of the composite...
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