POS7-1452
Effects of Hard Magnetic Particle Alignment on the Magnetic Actuation of Micropillars and Micro Soft Robots
Topic
S7. Innovations in Polymeric Composites: From Design and Processing to Industrial Applications
When and Where
Oct 1, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Jinkee HONG
Ki Su KIM
Presenter(s)
Hyeseong Kim (Hanyang University)
Co-Author(s)
Abstract
Magnetically actuated soft robots containing hard magnetic particles have attracted considerable attention because they enable wireless, untethered, and programmable motion under external magnetic fields. However, the influence of hard magnetic particle alignment on the actuation behavior of magnetic actuators remains insufficiently understood. Herein, we systematically investigate the effects of alignment conditions on hard magnetic particle alignment and the resulting actuation behavior of magnetic micropillars and microrobots. The degree of particle alignment is quantitatively evaluated as a function of magnetic flux density and alignment time and was correlated with the deformation amplitude of micropillars and the collective assembly behavior of multiple microrobots. Micropillars containing randomly distributed particles exhibit the largest bending deformation, whereas particle alignment generally reduces the bending amplitude. Among the aligned samples, however, the bending deformation increases with increasing particle alignment, indicating that the degree of alignment remains an important determinant of actuation performance. In contrast, although particle alignment reduced the bending deformation of individual micropillars, it enhanced magnetic interactions between microrobots, thereby promoting the formation and stability of multi-robot assemblies. These findings establish quantitative relationships between particle alignment condition, and magnetic actuation, providing design guidelines for magnetic micropillars and microrobots.
