Digital light processing 3D printing of dynamic magneto-responsive thiol-acrylate composites
Ines Cazin, Elisabeth Rossegger, Ignazio Roppolo, Marco Sangermano, Petra Granitzer, Klemens Rumpf, Sandra Schlögl
Abstract
digital light processing 3D printing. A mono-functional methacrylate phosphate is applied as a stabilizer to increase the resins' shelf life by preventing thiol-Michael reactions. Once photocured, the organic phosphate further acts as a transesterification catalyst and activates bond exchange reactions at elevated temperature, which render the magneto-active composites mendable and malleable. The healing performance is demonstrated by recovering magnetic and mechanical properties after the thermally triggered mending of 3D-printed structures. We further demonstrate the magnetically driven movement of 3D-printed samples, which gives rise to the potential use of these materials in healable soft devices activated by external magnetic fields.