Artículo
Magnetic characterization of chitosan–magnetite nanocomposite films
Kloster, Gianina Andrea
; Muraca, Diego; Meiorin, Cintia
; Pirota, Kleber R.; Marcovich, Norma Esther
; Mosiewicki, Mirna Alejandra
Fecha de publicación:
24/09/2014
Editorial:
Elsevier
Revista:
European Polymer Journal
ISSN:
0014-3057
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Magnetic nanocomposites using chitosan as a matrix and magnetite nanoparticles generated "in situ" were prepared and magnetically characterized. The content of nanoparticles on the composites was varied from 2 to 10 wt.% and their effects, as well as the addition of 30 wt.% of glycerol as plasticizer in the formulation, were analyzed. The magnetization properties were evaluated using the zero field cooling/field cooling (ZFC/FC) measurements and magnetization loops obtained at different temperatures. The results showed that magnetization at high field (20 KOe) and coercitivity increase with magnetite content. Super-paramagnetic behavior was observed for all non-plasticized samples with exception of the film with 2 wt.% of magnetite. Glycerol affected significantly the composite magnetization values and the magnetic interactions between particles, which are reflected in the blocking and irreversibility temperatures of the different systems. Moreover, the size of the precipitated magnetic nanoparticles depends on their concentration as well as on the addition of plasticizer to the formulation, as was corroborated by TEM and SAXS measurements.
Palabras clave:
Nanomagnetite.
,
Magnetic Properties
,
Chitosan Films
,
Plasticizer
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Articulos(INTEMA)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Citación
Kloster, Gianina Andrea; Muraca, Diego; Meiorin, Cintia; Pirota, Kleber R.; Marcovich, Norma Esther; et al.; Magnetic characterization of chitosan–magnetite nanocomposite films; Elsevier; European Polymer Journal; 72; 24-9-2014; 202-211
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