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Synthesis and properties of magnetic nanocomposites based on vegetable oil polymers for applications in hyperthermia.
C. MEIORIN; D. MURACA; D. G. ACTIS; P. MENDOZ ZÉLIS; M. I. ARANGUEN; M. KNOBEL; M. A. MOSIEWICKI
Rio de Janeiro
Conferencia; Fifth International Conference on Natural Polymers, Bio-Polymers, Bio-Materials, their Composites, Nanocomposites, Blends, IPNs, Polyelectrolytes and Gels: Macro to Nano Scales (ICNP 2017 Rio),; 2017
The synthesis and characterization of a novel type of nanocomposites based on vegetable oils 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 acid in order to hydrophobize their surfaces and make them more compatible with the polymeric matrix. On the other hand, the tung oil (TO) was the vegetable oil choosen to prepare the polymer matrix with shape memory behavior. TO mainly consists of glyceride of -elaeostearic 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 . This characteristic makes possible to obtain polymers using TO without any chemical modification in a presence of a cationic initiator. The aim of this work 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 absorption 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.