Segmented polyurethane-magnetite nanocomposites with shape memory behavior triggered by hyperthermia

SOTO, G.; MARCOVICH, NORMA E.; MENDOZA ZELIS, P.; ACTIS, D.G.; MEIORIN, CINTIA; MOSIEWICKI, MIRNA A.

Rio de Janeiro

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

Shape-memory polymers (SMP) possess the ability to hold a transient shape and to recover the original one after the application of a stimulus such as temperature, pH, light, electric or magnetic fields, specific ions and enzymes [1]. SMP turned out to be among the main components of intelligent and smart devices, which includes outstanding applications in biomedical and aerospacial fields, among others [2]. Among shape memory polymers, segmented polyurethanes (SP) stand out because they can recover strains unusually large, imposed by external mechanical loads [3]. Addition of magnetite nanoparticles (NP) allows to modify both the structural and functional properties of these SP, conferring them magnetic and electrical properties, among others. Magnetic NPs incorporated into the matrix might also offer the activation of the shape-memory property trough hyperthermia, by means of the application of an alternant magnetic field.