Version 1
: Received: 1 October 2024 / Approved: 1 October 2024 / Online: 1 October 2024 (11:07:22 CEST)
How to cite:
Shin, D. S.; Park, J. W.; Gal, C. W.; Kim, J.; Yang, W. S.; Yang, S. Y.; Kim, M. J.; Kwak, H. J.; Park, S. M.; Kim, J. H. Development of High-Aspect Ratio Soft Magnetic Microarrays for Magneto-Mechanical Actuation via Field-Induced Injection Molding. Preprints2024, 2024100044. https://doi.org/10.20944/preprints202410.0044.v1
Shin, D. S.; Park, J. W.; Gal, C. W.; Kim, J.; Yang, W. S.; Yang, S. Y.; Kim, M. J.; Kwak, H. J.; Park, S. M.; Kim, J. H. Development of High-Aspect Ratio Soft Magnetic Microarrays for Magneto-Mechanical Actuation via Field-Induced Injection Molding. Preprints 2024, 2024100044. https://doi.org/10.20944/preprints202410.0044.v1
Shin, D. S.; Park, J. W.; Gal, C. W.; Kim, J.; Yang, W. S.; Yang, S. Y.; Kim, M. J.; Kwak, H. J.; Park, S. M.; Kim, J. H. Development of High-Aspect Ratio Soft Magnetic Microarrays for Magneto-Mechanical Actuation via Field-Induced Injection Molding. Preprints2024, 2024100044. https://doi.org/10.20944/preprints202410.0044.v1
APA Style
Shin, D. S., Park, J. W., Gal, C. W., Kim, J., Yang, W. S., Yang, S. Y., Kim, M. J., Kwak, H. J., Park, S. M., & Kim, J. H. (2024). Development of High-Aspect Ratio Soft Magnetic Microarrays for Magneto-Mechanical Actuation via Field-Induced Injection Molding. Preprints. https://doi.org/10.20944/preprints202410.0044.v1
Chicago/Turabian Style
Shin, D. S., Sang Min Park and Jong Hyun Kim. 2024 "Development of High-Aspect Ratio Soft Magnetic Microarrays for Magneto-Mechanical Actuation via Field-Induced Injection Molding" Preprints. https://doi.org/10.20944/preprints202410.0044.v1
Abstract
Magnetorheological elastomers (MREs) are in demand in the field of high-tech micro- and nano-industries such as biomedical applications and soft robotics due to their exquisite magneto-sensitive response. Among various MRE applications, programmable actuators are emerging as promising soft robots because of their combined advantages of excellent flexibility and precise controllability in a magnetic system. Here, we present the development of a magnetically programmable soft magnetic microarray actuators through field-induced injection molding using MREs, which consist of styrene-ethylene/butylene styrene (SEBS) elastomer and carbonyl iron powder (CIP). The ratio of the CIP/SEBS matrix is designed to maximize the CIP fraction based on a critical solids loading. Further, as part of the design of the magnetization distribution in micropillar arrays, the magnetorheological response of the molten composites is analyzed using the static and dynamic viscosity results for both the on- and off- magnetic states, which reflect the particle dipole interaction and subsequent particle alignment during field-induced injection molding process. To develop high aspect ratio soft magnetic microarray, X-ray lithography is applied to prepare the sacrificial molds with a height-to-width ratio of 10. The alignment of CIP is designed to achieve a parallel magnetic direction along the micropillar columns, and consequently, the micropillar arrays successfully achieve the uniform and large bending actuation of up to approximately 81˚ with an applied magnetic field. This study suggests that the injection molding process offers a promising manufacturing approach to build a programmable soft magnetic microarray actuator.
Chemistry and Materials Science, Electronic, Optical and Magnetic Materials
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
