INVESTIGADORES
LASSALLE veronica Leticia
artículos
Título:
Novel and facile synthesis of magnetic composites by a modified co-precipitation
Autor/es:
VERONICA LASSALLE; R.ZYSLER; M.L.FERREIRA
Revista:
MATERIALS CHEMISTRY AND PHYSICS
Editorial:
ELSEVIER SCIENCE SA
Referencias:
Año: 2011 vol. 130 p. 624 - 634
ISSN:
0254-0584
Resumen:
A simple and effective method is proposed to synthesize chitosan/magnetite (CS/MAG) and cellulose/magnetite (CEL/MAG) composites. Biopolymers were employed in bulk during the co-precipitation of magnetite, avoiding the problems associated to the polymer’s solubility. FTIR and XRD analysis revealed that the polymeric template was perfectly integrated to the crystalline structure of magnetite. Measurements of zeta (Z) potential indicated that new materials present different charged surfaces dependingon the biopolymer. SEM/TEM and dynamic light scattering (DLS) results demonstrated that particulated materials with average diameters lower than 1 m were obtained. The magnetic properties of such composites were qualitatively verified. The as-obtained hybrids composites were tested for proteins adsorption using bovine serum albumin (BSA) and insulin (Ins) as models. It was found that CS/MAG was a better protein adsorbent than CEL/MAG. One important drawback of CEL/MAG was the lack of stability under the proteins adsorption conditions.