Work

On the origin of the electroactive poly(vinylidene fluoride) β-phase nucleation by ferrite nanoparticles via surface electrostatic interactions

Year: 2012

Type: article

Abstract: Flexible multiferroic 0–3 composite films, comprising NiFe2O4 and CoFe2O4 ferrite nanoparticles in a polyvinylidene fluoride (PVDF) matrix, have been prepared by solvent casting and melt crystallization to investigate the polymer β-phase nucleation mechanism. Infrared spectroscopy confirms the nucleation of the polymeric electroactive β-phase with the addition of both ferrites, although the loading of ferrite nanoparticles needed to obtain the highest amount of β-phase was found to be one order of magnitude higher in the NiFe2O4/PVDF nanocomposites. Transmission electron microscopy imaging and thermogravimetric analyses indicate the formation of an interface in the nanocomposites with the β-phase nucleation. It is shown that the essential factor for the nucleation of the β-phase in the ferrites/PVDF nanocomposites is the static electric interaction between the magnetic particles with a negative zeta potential and the CH2 groups having a positive charge density.

Source: CrystEngComm

DOI: 10.1039/c2ce06654h

Authors: Pedro Martins, Carlos M. Costa, Maria Benelmekki, Gabriela Botelho, Senentxu Lanceros-Mendez

Institutions: Centro de Física das Universidades do Minho e do Porto, University of Minho, Centro de Química

Language: English

Topic: Dielectric materials and actuators

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W1990422348

FWCI: 5.778

Cites: 34

Cited by: 289

Related to: 10