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Preparation and Characterization of 1-3 BaTiO3-PVDF Hybrid Nanocomposites

Published online by Cambridge University Press:  14 December 2012

A.A. Rodríguez-Rodríguez ,
N.A. Morales-Carrillo ,
C. Gallardo-Vega ,
G.F. Hurtado-López ,
J.A. Cepeda-Garza  and
V. Corral-Flores
A.A. Rodríguez-Rodríguez
Affiliation:
Centro de Investigación en Química Aplicada. Enrique Reyna Hermosillo 140, 25294, Saltillo, Coah., México.
N.A. Morales-Carrillo
Affiliation:
Centro de Investigación en Química Aplicada. Enrique Reyna Hermosillo 140, 25294, Saltillo, Coah., México.
C. Gallardo-Vega
Affiliation:
Centro de Investigación en Química Aplicada. Enrique Reyna Hermosillo 140, 25294, Saltillo, Coah., México.
G.F. Hurtado-López
Affiliation:
Centro de Investigación en Química Aplicada. Enrique Reyna Hermosillo 140, 25294, Saltillo, Coah., México.
J.A. Cepeda-Garza
Affiliation:
Centro de Investigación en Química Aplicada. Enrique Reyna Hermosillo 140, 25294, Saltillo, Coah., México.
V. Corral-Flores*
Affiliation:
Centro de Investigación en Química Aplicada. Enrique Reyna Hermosillo 140, 25294, Saltillo, Coah., México.
*
*Contact author’s e-mail: vcorral@ciqa.mx
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Abstract

1-3 BaTiO3-PVDF hybrid nanocomposites were prepared by combining electrospinning, sol-gel and spin-coating techniques. First, one-dimensional structures of barium titanate (BaTiO3) were obtained by electrospinning. An alcoholic solution consisting of Ba2+ and Ti4+ions (1:1 molar ratio) and poly(vinylpyrrolidone) was electrospun at 15 kV, with a tip-to-collector distance of 15 cm and a feed rate of 0.5 mL/h. Ceramic fibers were obtained after sintering the as-spun fibers at 900 °C for 2 hours. In a second step, poly(vinylidene fluoride) (PVDF) was incorporated to the oxide fibers by spin-coating a dimetilformamide solution, thus conforming 1-3 ceramic-polymeric hybrid nanocomposites on stainless steel substrates.

Scanning electron microscopy images showed that the as-spun fibers were smooth, long and continuous with an average diameter of 155 ± 40 nm, ranging from 60 to 240 nm, while sintered fibers presented a reduction in size, with an average diameter of 115 ± 16 nm, ranging from 96 to 120 nm. Sintered nanofibers were also long and continuous but with a rough surface. X-ray diffraction confirmed the perovskite-type structure of the BaTiO3. A structure refinement revealed a degree of tetragonality of 1.0046.

The polymer crystalline phases were identified by infrared spectroscopy on ATR mode. This study showed the presence of both β and γ polar phases, and absence of non-polar α phase, according to the characteristic bands for such crystalline phases.

The nanocomposites exhibited a ferroelectric behavior and electrical polarization according to their ceramic and polymeric components.

Keywords

ferroelectricfibernanostructure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1479: Symposium S – Nanostructured Materials and Nanotechnology—2012 , 2012 , pp. 33 - 38
Copyright
Copyright © Materials Research Society 2012

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References

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