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Preparation of magnetoelectric composites by nucleation of the electroactive β-phase of poly(vinylidene fluoride) by NiZnFe2O4 nanoparticles

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Resumo:Composites consisting on poly(vinylidene fluoride), PVDF, and nano-size NiZnFe2O4 ferrites have been prepared by solution casting. The addition of NiZnFe2O4 nucleates the polar β-phase of PVDF, leading to magnetoelectric composites suitable for sensor and actuator applications. The amount of β-phase increases with increasing amount of nanoparticles up to filler concentrations of ~5%wt. For this concentration almost 90% of the crystalline phase of the polymer is in the electroactive β-phase. The nucleation occurs due to epitaxial crystallization at the nanoparticle surface, leading to variations in the crystallization kinetics and to the stabilization of the β-phase.
Autores principais:Martins, P.
Outros Autores:Costa, C. M.; Benelmekki, M.; Lanceros-Méndez, S.
Assunto:Magnetoelectric PVDF Nanocomposites Nucleation
Ano:2013
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso restrito
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho

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