INTECIN   20395
INSTITUTO DE TECNOLOGIAS Y CIENCIAS DE LA INGENIERIA "HILARIO FERNANDEZ LONG"
Unidad Ejecutora - UE
artículos
Título:
Preparation and Characterization of Nanocomposites for Technological Applications
Autor/es:
J. C. APHESTEGUY; SILVIA E. JACOBO
Revista:
DIFFUSION AND DEFECT DATA, SOLID STATE DATA. PART B, SOLID STATE PHENOMENA
Editorial:
Trans Tech Publications
Referencias:
Año: 2013 vol. 202 p. 97 - 111
ISSN:
1012-0394
Resumen:
Materials with both electrical and magnetic properties are required for various
applications ranging from electric and magnetic shields, molecular electronics, and sensors to
microwave absorbers. Conducting polymers with the addition of magnetic oxides composites are
suitable for such uses. Such is the case of the polyaniline (PANI), an organic polymer, mixed with
magnetite. We have prepared through a new chemical method a PANI/ Fe3O4 composite with
different amount of magnetic oxide from 0.3% m/m on the composite up to 42% m/m. The final
product is a powder with good solubility in some organic solvents as chloroform. Structural
morphological studies, transport properties (the electrical conductivity as a function of temperature)
and magnetic characterization were performed on the oxides, on PANI and on the composites. We
have explored the answer of these composites as absorbers in the microwave region to determine its
potential technological application. An interesting magnetoresistance (MR) behavior was observed.
The results are related to the particle size and to the influence of the percentage of oxide in the
composite.