Optimized magneto-responsivity of vitrimer composite with structure-property relationships

초록

Vitrimer is a material that exhibits both thermoset and thermoplastic properties through covalent adaptive networks, offering facile reprocessability of thermoplastics in addition to high mechanical performance and solvent resistance of thermoset. In order to expand its applications toward magnetically responsive composites, , in this study, magnetic particles were embedded into vitrimers to generate a contactless shape manipulation via external magnetic fields. We investigate bending actuation of magneto-responsive vitrimer micropillar arrays depending on the concentration of magnetic particles. We will discuss optimized concentration of magnetic particles within the vitrimer micropillar to obtain the highest bending angle by structure-property relationships. Finally, we demonstrate shape fixation of magnetically actuated pillars after removal of magnetic field via thermomechanical process.