Piezoelectric polyvinylidene fluoride-based epoxy composites produced by combined uniaxial compression and poling

摘要

We present a simple, efficient method, which combines uniaxial compression and subsequent poling, to produce piezoelectric polyvinylidene fluoride-based epoxy composites. The values of the piezoelectric factors obtained are slightly higher than those of neat piezoelectric polyvinylidene fluoride. The composites respond rapidly and reach a saturation voltage output, to the application of mechanical stimulus quickly. The composites are promising for the creation of "bulk" piezoelectric devices, different from the usual stretched films, exploiting the physico-chemical a of the epoxy matrix. The piezoelectric factor d(31) vs the mechanical stimulus for the specimens studied scale according to a double logarithmic representation.