In this work composites of PVDF-TrFE containing 60 vol% untreated and surface modified BaTiO3 were produced by solvent casting with two procedures. Their morphology and structure were characterized by scanning electron microscope, X-ray diffraction and differential scanning calorimetry. The effect of the processing conditions and of the surface modification of BaTiO3 on the viscoelastic, dielectric and piezoelectric properties was investigated. The surface modification of BaTiO3 allowed obtaining composite films with low porosity and good filler dispersion, and hence higher storage modulus and lower loss tangent, in a wider processing window. Furthermore it reduced the dielectric losses at low frequency and modified the decay kinetic of the d33 piezoelectric coefficient with respect to composites made with untreated particles.
Tailoring the interfacial interactions in ferroelectric fluorinated polymer/ceramic nanocomposites / Dalle Vacche, S.; Oliveira, F.; Leterrier, Y.; Michaud, V.; Damjanovic, D.; Manson, J. -A. E.. - ELETTRONICO. - (2014). (Intervento presentato al convegno 16th European Conference on Composite Materials, ECCM 2014 tenutosi a Seville, Spain nel 22–26 June 2014 |).
Tailoring the interfacial interactions in ferroelectric fluorinated polymer/ceramic nanocomposites
Dalle Vacche S.;
2014
Abstract
In this work composites of PVDF-TrFE containing 60 vol% untreated and surface modified BaTiO3 were produced by solvent casting with two procedures. Their morphology and structure were characterized by scanning electron microscope, X-ray diffraction and differential scanning calorimetry. The effect of the processing conditions and of the surface modification of BaTiO3 on the viscoelastic, dielectric and piezoelectric properties was investigated. The surface modification of BaTiO3 allowed obtaining composite films with low porosity and good filler dispersion, and hence higher storage modulus and lower loss tangent, in a wider processing window. Furthermore it reduced the dielectric losses at low frequency and modified the decay kinetic of the d33 piezoelectric coefficient with respect to composites made with untreated particles.File | Dimensione | Formato | |
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https://hdl.handle.net/11583/2918260