Light-Triggered In-Operando Shape Fixation of Magneto-Responsive Microtextures with Covalent Adaptable Networks
발표자
문호준 (한양대학교)
연구책임자
위정재 (한양대학교)
초록
내용
Magneto-responsive microtextures enable the formation of complex 3D microstructures via magnetic deformation, yet the deformed shapes typically revert to their original form once the magnetic field is removed. In this presentation, we introduce disulfide-based covalent adaptable networks (DS-CANs) as a matrix to enable shape fixation through dynamic covalent bonding. DS-CANs undergo UV-triggered bond exchange reactions at room temperature, allowing the magnetically deformed shapes to be fixed on demand. Magnetomechanical actuation of the DS-CAN-based microarrays is achieved by incorporating hard magnetic NdFeB particles into the composite. These DS-CAN/NdFeB microarrays demonstrate not only on-demand magnetic actuation but also reversible and patternable shape fixation via UV exposure under an external magnetic field. Furthermore, we fabricated complex 3D hierarchical and staggered-overlapped microstructures inspired by microdenticles through UV-assisted shape fixation.