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J. Korean Ceram. Soc. > Volume 61(3); 2024 > Article
Journal of the Korean Ceramic Society 2024;61(3): 429-435.
doi: https://doi.org/10.1007/s43207-024-00369-x
Highly stretchable and self-healing SEBS-PVDF composite films for enhanced dielectric elastomer generators
Soon Joo Yoon1, Hyunseung Kim1,2, Chang Kyu Jeong1,2,3 , Yoon Kyeung Lee1,4
1Division of Advanced Materials Engineering, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
2Department of Energy Storage/Conversion Engineering of Graduate School & Hydrogen and Fuel Cell Research Center, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
3Department of JBNU-KIST Industry-Academia Convergence Research, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
4Department of JBNU-KIST Industry-Academia Convergence Research, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
Correspondence  Chang Kyu Jeong ,Email: ckyu@jbnu.ac.kr
Yoon Kyeung Lee ,Email: yoonklee@jbnu.ac.kr
Received: October 28, 2023; Revised: December 21, 2023   Accepted: January 6, 2024.  Published online: February 16, 2024.
ABSTRACT
The rapid expansion of soft electronics and actuators necessitates the development of mechanically robust substrates possessing a unique combination of properties: high stretchability, self-healing capabilities, and favorable dielectric characteristics. This study presents a novel composite film comprising an elastic Styrene-Ethylene-Butylene-Styrene (SEBS) matrix and a high dielectric constant Polyvinylidene Fluoride (PVDF) component. A systematic investigation of its mechanical characteristics reveals exceptional stretchability, with a strain of up to 1600%, and showcases remarkable self-healing properties, which manifest upon exposure to a moderate temperature of 70 ᕑ. The incorporation of SEBS not only imparts mechanical resilience but also contributes to the stabilization of dielectric properties across a wide range of frequencies while the incorporation of PVDF contributes the increase of the output voltages upon pressure. The versatility of this material system holds potential for addressing a wide array of challenges in soft electronics, from conformable wearable technologies to adaptable robotic interfaces.
Key words: Stretchable  · Self-healing  · Dielectric  · Elastomer  · PVDF
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