PVA-based magnetic nanocomposite material produced by aqueous tape casting

Reference Presenter Authors
(Institution)
Abstract
02-042 Antonio Carlos Silva Costa Costa, A.C.(Federal University of Rio Grande do Norte); Alves, H.P.(Federal University of Rio Grande do Norte); Correa, M.A.(Federal University of Rio Grande do Norte); Acchar, W.(Federal University of Rio Grande do Norte); In recent years, the synthesis of magnetic nanostructures has become a particularly important research field and is attracting growing interest. Due to their advantages, such as chemical stability, biocompatibility, and low toxicity magnetic nanostructures have been intensively studied not only for fundamental scientific interest but also potential applications in biomedical fields, especially in the field of targeted drug delivery. Iron oxide nanoparticles (NPs) have attracted much consideration due to their unique properties, such as surface-to-volume ratio, greater surface area, and easy separation methodology. Various physical, chemical, and biological methods have been adopted to synthesize magnetic. NPs with suitable surface chemistry, among the various methods, solution combustion synthesis has attracted a great attention on account of its simplicity and energy saving, environmentally friendliness and homogeneous products. The tape casting sometimes referred to as the doctor-blade process. This method consists in the slurry spread over a surface using a carefully controlled blade referred to as a doctor blade. In this work flexible sheets of PVA/NPM were produced. The method of microwave assisted combustion was applied to obtain the magnetic NPs. Tape casting method was used to obtain the sheets. The study of the structural and magnetic properties was performed through X-ray diffraction and Rietveld refinement, scanning electron microscopy and magnetic measurements. The Fe3O4 (magnetite), Fe2O3 (hematite) and FeO (Wustite) phases were observed, with the aid of the Rietveld refinement, the proportion of phases in the sample was 54.40%, 43.69% and 1.91%, respectively. The magnetization curve shows an increase in magnetization as the magnetic feld increases, characteristic of soft magnetic materials was observed. The method proved to be efficient in obtaining flexible sheets of PVA/NPM with interesting magnetic properties.