A Highly Efficient Self‐Healing Elastomer with Unprecedented Mechanical Properties

Abstract It is highly desirable, although very challenging, to develop self‐healable materials exhibiting both high efficiency in self‐healing and excellent mechanical properties at ambient conditions. Herein, a novel Cu(II)–dimethylglyoxime–urethane‐complex‐based polyurethane elastomer (Cu–DOU–CPU) with synergetic triple dynamic bonds is developed. Cu–DOU–CPU demonstrates the highest reported mechanical performance for self‐healing elastomers at room temperature, with a tensile strength and toughness up to 14.8 MPa and 87.0 MJ m −3 , respectively. Meanwhile, the Cu–DOU–CPU spontaneously self‐heals at room temperature with an instant recovered tensile strength of 1.84 MPa and a continuously increased strength…

• NS
  Natural Science Foundation of Shanghai

  Award: 18ZR1401900
• NN
  National Natural Science Foundation of China

  Awards: 31771048, 31570984, 21642004, 21574019
• SA
  Science and Technology Commission of Shanghai Municipality

  Award: 17DZ2260100
• DU
  Donghua University

  Award: LZA2019001
• FR
  Fundamental Research Funds for the Central Universities