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Fully Stretchable Electromagnet Using Magnetoactive PDMS Sponges and Metallic Coils

  • Functional Nanomaterials for Energy Applications
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Abstract

Stretchable and flexible devices are being widely developed for the application of modern electronics to biological systems which are soft, elastic, and curved. However, stretchable and flexible electromagnetic and/or magnetic devices are relatively rare, regardless of their importance in many electromechanical systems. Therefore, this study develops a fully stretchable electromagnet using a metallic coil and a magnetoactive polydimethylsiloxane (PDMS) sponge embedded with iron microparticles. In a cylindrical prototype, the magnetoactive PDMS sponge acts as a ferromagnetic core of the electromagnet, enhancing the magnetic fields to ~ 300% of that of a control device without the iron microparticles. The microscale pores of the PDMS sponge and the spring structures of the metallic coil enable the elongation of the electromagnet up to ~ 115%. Similarly, we fabricated and experimentally characterized a patch-shaped prototype of a fully stretchable electromagnet, and discussed its practical limitations.

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Acknowledgement

This work was supported by the research fund of Hanyang University (HY-2015-N) and the “Human Resources Program in Energy Technology” of the Korean Institute of Energy Technology Evaluation and Planning (KETEP), granted by the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20174010201310).

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  1. Jong In Kim and Sungho Jeon have contributed equally to the work.

Authors and Affiliations

  1. Department of Mechanical Engineering, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea

    Jong In Kim, Sungho Jeon & Won Chul Lee

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  1. Jong In Kim
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  2. Sungho Jeon
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  3. Won Chul Lee
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Correspondence to Won Chul Lee.

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Kim, J.I., Jeon, S. & Lee, W.C. Fully Stretchable Electromagnet Using Magnetoactive PDMS Sponges and Metallic Coils. JOM 71, 4556–4561 (2019). https://doi.org/10.1007/s11837-019-03788-y

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