Synthesis and properties of magnetic nanocomposites based on vegetable oil polymers for applications in hyperthermia

C. MEIORIN; D. MURACA; D. G. ACTIS; P. MENDOZA ZELÍS; M. I. ARANGUREN; M. KNOBEL; M. A. MOSIEWICKI

Rio de Janeiro

Conferencia; Fifth International Conference on Natural Polymers, Biopolymers and biomaterials: Applications from macro to nanoscale; 2017

The synthesis and characterization of a novel type of nanocomposites based on vegetable oil and magnetite is described. Magnetite nanoparticles (MNP) with a mean size of 9.8 nm were prepared by a co-precipitation method from an aqueous Fe3+/Fe2+ solution using excess of a concentrated solution of NH4OH, then they were coated with oleic acide in order to hydrophobize their surfaces and make them more compatible with the polymeric matrix [1]. On the other hand, the tung oil (TO) was the vegetable oil chosen to prepare the polymer matrix with shape memory behavior. TO mainly consists of glyceride of -clacostearic acid, a highly unsaturated-conjugate acid, which is responsible for the rapid polymerization that takes place in the presence of atmospheric oxygen, resulting in the good drying properties of this oil [2,3]. This caracteristic makes possible to obtain polymers using TO without any chemical modificaiton in presence of a cationic initiatior.The aim of this owrk is to study the effect of the concentration of magnetite nanoparticles in the properties of nanocomposites based on tung oil obtained by cationic polymerization with styrene. The dynamic-mechanical behavior, shape memory and magnetic properties were studied. Specific absortion rate (SAR) measurements show that hyperthermia can be possible and that the heating rate of the samples increases with the concentration of magnetite in the nanocomposites.Acknowledgements: The authors acknowledge the financial support provided by the CONICET, ANPCyT and UNMdP in Argentina, and by the CNPq and the FAPESP in Brazil.References:[1] Meiorin C.; Muraca D.; Pirota K.R.; Aranguren M.I.; Mosiewicki M.A.: European Polymer Journal, 53 (1), 90 (2014).[2] Meiorin C.; Aranguren M.I. and Mosiewicki M.A.: Polymer International, 61, 735-742 (2012).[3] Meiorin C., Londoño O.M., Muraca D., Socolovsky L. M., Pirota K.R., Aranguren M.I., Knobel M., Mosiewicki M.A.: Materials Chemistry and Physics, 175, 81-91 (2016).