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Mechano-responsive hydrogen-bonding array of thermoplastic polyurethane elastomer captures both strength and self-healing

Author

Listed:
  • Youngho Eom

    (Pukyong National University)

  • Seon-Mi Kim

    (Korea Research Institute of Chemical Technology (KRICT))

  • Minkyung Lee

    (Korea Research Institute of Chemical Technology (KRICT))

  • Hyeonyeol Jeon

    (Korea Research Institute of Chemical Technology (KRICT))

  • Jaeduk Park

    (The Catholic University of Korea (CUK))

  • Eun Seong Lee

    (The Catholic University of Korea (CUK))

  • Sung Yeon Hwang

    (Korea Research Institute of Chemical Technology (KRICT)
    University of Science and Technology (UST))

  • Jeyoung Park

    (Korea Research Institute of Chemical Technology (KRICT)
    University of Science and Technology (UST))

  • Dongyeop X. Oh

    (Korea Research Institute of Chemical Technology (KRICT)
    University of Science and Technology (UST))

Abstract

Self-repairable materials strive to emulate curable and resilient biological tissue; however, their performance is currently insufficient for commercialization purposes because mending and toughening are mutually exclusive. Herein, we report a carbonate-type thermoplastic polyurethane elastomer that self-heals at 35 °C and exhibits a tensile strength of 43 MPa; this elastomer is as strong as the soles used in footwear. Distinctively, it has abundant carbonyl groups in soft-segments and is fully amorphous with negligible phase separation due to poor hard-segment stacking. It operates in dual mechano-responsive mode through a reversible disorder-to-order transition of its hydrogen-bonding array; it heals when static and toughens when dynamic. In static mode, non-crystalline hard segments promote the dynamic exchange of disordered carbonyl hydrogen-bonds for self-healing. The amorphous phase forms stiff crystals when stretched through a transition that orders inter-chain hydrogen bonding. The phase and strain fully return to the pre-stressed state after release to repeat the healing process.

Suggested Citation

  • 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.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-20931-z
    DOI: 10.1038/s41467-021-20931-z
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    Cited by:

    1. Yong Min Kim & Jin Han Kwon & Seonho Kim & U Hyeok Choi & Hong Chul Moon, 2022. "Ion-cluster-mediated ultrafast self-healable ionoconductors for reconfigurable electronics," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    2. FuYao Sun & LongFei Liu & Tong Liu & XueBin Wang & Qi Qi & ZuSheng Hang & Kai Chen & JianHua Xu & JiaJun Fu, 2023. "Vascular smooth muscle-inspired architecture enables soft yet tough self-healing materials for durable capacitive strain-sensor," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    3. Zhihao Li & Chunmei Jia & Zhi Wan & Jiayi Xue & Junchao Cao & Meng Zhang & Can Li & Jianghua Shen & Chao Zhang & Zhen Li, 2023. "Hyperbranched polymer functionalized flexible perovskite solar cells with mechanical robustness and reduced lead leakage," Nature Communications, Nature, vol. 14(1), pages 1-12, December.

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