Magnetoresponsive Devices with Programmable Behavior Using a Customized Commercial Stereolithographic 3D Printer
Dispositifs magnétorésonnants à comportement programmable utilisant une imprimante 3D stéréolithographique commerciale personnalisée
Résumé
The revolution of 4D printing allows combining smart materials to additive processes to create behavioral objects able to respond to external stimuli, such as temperature, light, electrical or magnetic fields. Here, we used a modified commercial Digital Light Processing (DLP) 3D printer to obtain complex macroscopic remotely-controlled gear-based devices. The fabrication process is based on the printing of magneto-responsive polymers containing in situ selfassembled microstructures, i.e. composed of oriented chains of Fe3O4 nanoparticles. First, we demonstrate that we are able to print magneto-responsive hammer-like actuators with different stiffness allowing both pure rotation or/and bending motions. Then, we exploit microstructure to create a magneto-responsive gear. In particular, we showed that they can be successfully used to transfer torque to other gears, thereby converting a rotation movement into linear translation. Finally, we demonstrated that magneto-responsive gears can be also combined with other non-magnetic elements to create complex assemblies, such as gear-trains, linear actuators and grippers, that can be remotely controlled.
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