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高等学校化学研究 ›› 2020, Vol. 36 ›› Issue (6): 1141-1142.doi: 10.1007/s40242-020-0323-8

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Polyprotein Cross-linked Hydrogels with High Stretchability, Fracture Toughness and Low Hysteresis

LIU Dongsheng   

  1. Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
  • 收稿日期:2020-10-09 修回日期:2020-10-12 出版日期:2020-12-01 发布日期:2020-10-12
  • 通讯作者: LIU Dongsheng E-mail:polymer@tsinghua.edu.cn

Polyprotein Cross-linked Hydrogels with High Stretchability, Fracture Toughness and Low Hysteresis

LIU Dongsheng   

  1. Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
  • Received:2020-10-09 Revised:2020-10-12 Online:2020-12-01 Published:2020-10-12
  • Contact: LIU Dongsheng E-mail:polymer@tsinghua.edu.cn

摘要： It is challenging to realize both high fracture toughness and low hysteresis perfectly in synthetic systems, which restricts the use of stretchable hydrogels in load-bearing applications. Recently, by imbedding the folded polyprotein cross-linker in a percolating random coiled network, Cao et al. demonstrated a highly stretchable hydrogel, which shows low hysteresis(<5%) but achieves high fracture toughness(ca. 900 J/m2). Moreover, the hydrogel shows outstanding anti-fatigue properties with a fatigue fracture threshold of 126 J/m2. The unique network structure breaks the hysteresis-toughness correlation that is usually reported in stretchable and tough hydrogels. This work has been published in the Nature Communications and can be reached at https://doi.org/10.1038/s41467-020-17877-z.

Abstract: It is challenging to realize both high fracture toughness and low hysteresis perfectly in synthetic systems, which restricts the use of stretchable hydrogels in load-bearing applications. Recently, by imbedding the folded polyprotein cross-linker in a percolating random coiled network, Cao et al. demonstrated a highly stretchable hydrogel, which shows low hysteresis(<5%) but achieves high fracture toughness(ca. 900 J/m2). Moreover, the hydrogel shows outstanding anti-fatigue properties with a fatigue fracture threshold of 126 J/m2. The unique network structure breaks the hysteresis-toughness correlation that is usually reported in stretchable and tough hydrogels. This work has been published in the Nature Communications and can be reached at https://doi.org/10.1038/s41467-020-17877-z.