聚合物材料的自愈合能延长材料的使用寿命,减少资源的浪费。聚氨酯材料因具有特殊相态结构而广泛用于自愈合研究。与动态非共价键相比,聚氨酯材料中引入动态共价键,不仅可以实现自愈合,也能赋予材料较好的力学性能。综述了自愈合聚氨酯材料中引入动态共价键的类型、愈合条件以及力学性能,指出平衡动态共价键的刺激条件、愈合效率和力学性能之间的矛盾是今后的研究方向。
The self-healing of polymers can prolong the service life of materials and reduce the waste of resources,which is widely considered by researchers.Polyurethane(PUR) is extensively used in self-healing studies due to its special phase structure.Compared with dynamic non-covalent bonds,the incorporation of dynamic covalent bonds not only enhanced the self-healing of polyurethane,but also imparted it strong mechanical properties.The types of dynamic covalent bonds,healing conditions and mechanical properties of self-healing PUR materials were reviewed.Exploring the solution to trade-off between healing conditions,healing efficiency and mechanical properties of polymers was a direction for future research.
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