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Article

An Ultrastretchable Electrical Switch Fiber with a Magnetic Liquid Metal Core for Remote Magnetic Actuation

1
Department of Polymer-Nano Science and Technology, Department of Nano Convergence Engineering Jeonbuk National University, Jeonju 54896, Korea
2
R&D Division, Korea Institute of Carbon Convergence Technology, Jeonju 54853, Korea
3
Department of Carbon-Nanomaterials Engineering, Jeonju University, 303 Cheonjam-ro, Jeonju 55069, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Vijay Kumar Thakur
Polymers 2021, 13(15), 2407; https://doi.org/10.3390/polym13152407
Received: 17 June 2021 / Revised: 14 July 2021 / Accepted: 20 July 2021 / Published: 22 July 2021
(This article belongs to the Special Issue Elastomers in Electronic Applications in 2022)
In this work we describe a soft and ultrastretchable fiber with a magnetic liquid metal (MLM) core for electrical switches used in remote magnetic actuation. MLM was prepared by removing the oxide layer on the liquid metal and subsequent mixing with magnetic iron particles. We used SEBS (poly[styrene-b-(ethylene-co-butylene)-b-styrene]) and silicone to prepare stretchable elastic fibers. Once hollow elastic fibers form, MLM was injected into the core of the fiber at ambient pressure. The fibers are soft (Young’s modulus of 1.6~4.4 MPa) and ultrastretchable (elongation at break of 600~5000%) while maintaining electrical conductivity and magnetic property due to the fluidic nature of the core. Magnetic strength of the fibers was characterized by measuring the maximum effective distance between the magnet and the fiber as a function of iron particle concentration in the MLM core and the polymeric shell. The MLM core facilitates the use of the fiber in electrical switches for remote magnetic actuation. This ultrastretchable and elastic fiber with MLM core can be used in soft robotics, and wearable and conformal electronics. View Full-Text
Keywords: stretchable elastic fiber; liquid metal; magnetic liquid metal composite; stretchable electronics stretchable elastic fiber; liquid metal; magnetic liquid metal composite; stretchable electronics
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MDPI and ACS Style

Hong, K.; Choe, M.; Kim, S.; Lee, H.-M.; Kim, B.-J.; Park, S. An Ultrastretchable Electrical Switch Fiber with a Magnetic Liquid Metal Core for Remote Magnetic Actuation. Polymers 2021, 13, 2407. https://doi.org/10.3390/polym13152407

AMA Style

Hong K, Choe M, Kim S, Lee H-M, Kim B-J, Park S. An Ultrastretchable Electrical Switch Fiber with a Magnetic Liquid Metal Core for Remote Magnetic Actuation. Polymers. 2021; 13(15):2407. https://doi.org/10.3390/polym13152407

Chicago/Turabian Style

Hong, Kyeongmin, Minjae Choe, Seoyeon Kim, Hye-Min Lee, Byung-Joo Kim, and Sungjune Park. 2021. "An Ultrastretchable Electrical Switch Fiber with a Magnetic Liquid Metal Core for Remote Magnetic Actuation" Polymers 13, no. 15: 2407. https://doi.org/10.3390/polym13152407

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