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Self-healing electronic skin with high fracture strength and toughness

Author

Listed:
  • Jaehoon Jung

    (Korea Advanced Institute of Science and Technology (KAIST))

  • Sunwoo Lee

    (Korea Advanced Institute of Science and Technology (KAIST))

  • Hyunjun Kim

    (Seoul National University)

  • Wonbeom Lee

    (Korea Advanced Institute of Science and Technology (KAIST))

  • Jooyeun Chong

    (Korea Advanced Institute of Science and Technology (KAIST))

  • Insang You

    (Waterloo)

  • Jiheong Kang

    (Seoul National University)

Abstract

Human skin is essential for perception, encompassing haptic, thermal, proprioceptive, and pain-sensing functions through ion movement. Additionally, it is mechanically resilient and self-healing for protection. Inspired by these unique properties, researchers have attempted to develop stretchable, self-healing sensors based on ion dynamics. However, most self-healing sensors reported to date suffer from low fracture strength and toughness. In this work, we present an ion-based self-healing electronic skin with exceptionally high fracture strength and toughness. We enhanced self-healing polymers and ionic conductors by introducing two types of orthogonal dynamic crosslinking bonds: dynamic aromatic disulfide bonds and 2-ureido-4-pyrimidone moieties. These dynamic bonds provide autonomous self-healing and high mechanical toughness even in the presence of ionic liquids. As a result, our self-healing polymer and self-healing ionic conductor exhibit remarkable stretchability (700%, 850%), fracture strength (34 MPa, 30 MPa), and toughness (78.5 MJ/m3, 87.3 MJ/m3), the highest values reported among self-healing ionic conductors to date. Using our materials, we developed various fully self-healing sensors and a soft gripper capable of autonomously recovering from mechanical damage. By integrating these components, we created a comprehensive self-healing electronic skin suitable for soft robotics applications.

Suggested Citation

  • Jaehoon Jung & Sunwoo Lee & Hyunjun Kim & Wonbeom Lee & Jooyeun Chong & Insang You & Jiheong Kang, 2024. "Self-healing electronic skin with high fracture strength and toughness," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-53957-0
    DOI: 10.1038/s41467-024-53957-0
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    References listed on IDEAS

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    1. David G. Mackanic & Xuzhou Yan & Qiuhong Zhang & Naoji Matsuhisa & Zhiao Yu & Yuanwen Jiang & Tuheen Manika & Jeffrey Lopez & Hongping Yan & Kai Liu & Xiaodong Chen & Yi Cui & Zhenan Bao, 2019. "Decoupling of mechanical properties and ionic conductivity in supramolecular lithium ion conductors," Nature Communications, Nature, vol. 10(1), pages 1-11, December.
    2. Youngho Eom & Seon-Mi Kim & Minkyung Lee & Hyeonyeol Jeon & Jaeduk Park & Eun Seong Lee & Sung Yeon Hwang & Jeyoung Park & Dongyeop X. Oh, 2021. "Mechano-responsive hydrogen-bonding array of thermoplastic polyurethane elastomer captures both strength and self-healing," Nature Communications, Nature, vol. 12(1), pages 1-11, December.
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