Magnetic Films Based on Bio-Polymers and Nanomagnetite

GIANINA A. KLOSTER; DIEGO MURACA; MIRNA A. MOSIEWICKI; NORMA E. MARCOVICH

Cancún

Simposio; XV Simposio Latinoamericano de Polímeros, XIII Congreso Iberoamericano de Polímeros; 2016

The synthesis of monodisperse nanostructures of iron oxide is currently of tremendous interest since they are extensively used in magnetic materials as photocatalyst, sensors and medical applications such as hyperthermia, targeted drug delivery, magnetic resonance imaging, etc.1. However, magnetic iron oxide nanoparticles have hydrophobic surfaces with large surface area to volume ratio and thus, the coupling of the hydrophobic interactions with magnetic ones results in particle aggregation, leading to a decrease in the magnetic properties of the agglomerated nanoparticles respect to those of the disaggregated ones. In this sense, synthesis methods that embed nanoparticles into polymers, glass or SiO2 matrices have the added benefits of minimizing nanoparticle aggregation and forming uniform particle dispersion with a narrow particle size distribution.2. In addition, if the polymer matrix is a biopolymer, several advantages are incorporated to the final material: biodegradability, biocompatibility, use of renewable resources with the consequent decrease in the environmental impact, among others. In this work, the preparation and characterization of nanocomposite films based on chitosan and alginate biopolymers, and magnetite nanoparticles (MNP) are presented and discussed.