Formation of Composites with a Hydrogel Matrix Filled with Cobalt Ferrite/Piezoelectric Magnetoelectric Elements by Stereolithographic 3D Printing

Formation of composite bone implants filled with magnetoelectric elements (MEs) magnetostrictor/piezoelectric was carried out using stereolithographic 3D printing. Such implants are capable of generating local electric fields under the action of an external magnetic field, creating an additional electrical stimulus for bone tissue regeneration. CoFe 2 O 4 was used as a magnetostrictive material, and BaTiO 3 , Na 0.5 K 0.5 NBO 3 , and BiFeO 3 were used as piezoelectric materials. Magnetoelectric elements filled a hydrogel matrix based on a photopolymerized polyethylene glycol diacrylate (PEGDA) monomer. The main problems of stereolithographic formation of macroporous ME composites are related to the very strong absorption of UV radiation (405 nm) by monomer suspensions containing CoFe 2 O 4 and BiFeO 3 particles.