Abstract
This paper presents the development of epoxy-silica nanocomposites and characterized for dielectric properties. The effect of nanosilica loading (0–20 wt%), frequency, temperature and sea water aging on these properties was studied. Transmission electron microscopy (TEM) analysis of the samples showed an excellent dispersion. However, at higher silica loading TEM showed inter-contactity of the particles. The dielectric constant (ε′) increased with silica loading and reached an optimum at about 10 wt%. The ε′ of the nanocomposites showed linear decrease with frequency whereas AC conductivity (σ ac) increases. The σ ac and ε′ increased marginally with temperature and sea water aging.
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