Abstract
Elastomers with high mechanical toughness can guarantee their durability during service life.Self-healing ability,as well as recyclabili-ty,can also extend the life of materials and save the consuming cost of the materials.Many efforts have been dedicated to promoting the me-chanical toughness as well as the self-healing capability of elastomers at the same time,while it remains a challenge to balance the trade-off be-tween the above properties in one system.Herein we proposed a molecular design driven by dual interactions of acylsemicarbazide hydrogen bonding and Cu2+-neocuproine coordination simultaneously.By introducing the reversible multiple hydrogen bonds and strong coordination bonds,we successfully fabricated an extremely tough and self-healing elastomer.The elastomer can achieve an impressive top-notch toughness of 491 MJ/m3.Furthermore,it boasted rapid elastic restorability within 10 min and outstanding crack tolerance with high fracture energy(152.6 kJ/m2).Benefiting from the combination of dynamic interactions,the material was able to self-repair under 80 ℃ conveniently and could be re-processed to restore the exceptional mechanical properties.
基金项目
National Natural Science Foundation of China(22075130)
Fundamental Research Funds for the Central Universities()
万方数据