Waterborne polyurethanes are widely used in production and daily life due to their excellent physicochemical properties.However,during processing and use,waterborne polyurethanes inevitably suffer from frictional damage,which can lead to the formation of micro-cracks.These cracks can further expand into larger cracks,causing rapid performance degradation and thus affecting their service life.Therefore,achieving the circular economy use of waterborne polyurethanes through functional modification is of great significance.Inspired by nature,intrinsic type self-healing materials have emerged as the latest trend in materials science and have attracted much attention in recent years.The article reviews the research progress of intrinsic type self-healing waterborne polyurethanes from the aspects of reversible covalent bonds and reversible non-covalent chemical bonds,discusses the healing mechanisms and applications of waterborne polyurethanes based on different dynamic chemical bonds,elaborates on the challenges faced by self-healing waterborne polyurethane materials,and points out that self-healing waterborne polyurethane materials with high healing efficiency,short healing time,the ability to self-heal under mild conditions,and excellent mechanical properties will be realized in the near future and gradually enter the practical application phase.
关键词
自愈合/水性聚氨酯/本征型/可逆动态键
Key words
Self-healing/Waterborne polyurethanes/Intrinsic type/Reversible dynamic bond
维普
万方数据