【摘要】 回顾了微胶囊型自修复高分子材料中双环戊二烯-Grubbs催化剂、聚二甲基硅氧烷-锡(铂)催化剂、环氧树脂-固化剂和异氰酸酯等自修复体系的研究现状,重点介绍了异氰酸酯胶囊型自修复材料的修复机理和研究新进展。异氰酸酯胶囊型自修复是通过异氰酸酯修复剂(主要是异佛尔酮二异氰酸酯、六亚甲基二异氰酸酯及其三聚体等)潮固化来实现,并简要探讨了影响微胶囊自修复高分子材料自修复效果的主要因素(微胶囊的芯材、力学性能以及微胶囊与基材的相容性)。最后指出了微胶囊型自修复高分子材料今后的研究方向(建立自修复过程的模型,将微胶囊应用到存在一些如晶界、气孔等微结构的材料中)及其应用前景(提高航空航天和民用高铁等高速高风险项目的可靠性,开发自修复涂料、胶黏剂等)。更多还原

【Abstract】 This paper begins with a review of the research status of microcapsules-based self-healing polymeric materials including dicyclopentadiene-Grubbs catalyst, polydimethylsiloxane-tin(Pt) catalyst,epoxy-curing agent and isocyanate system. Self-healing mechanism and research progress of encapsuled isocyanate self-healing material are summarized. Self-healing function of particles encapsuled isocyanate actived through the curing process of isocyanate agent(mainly includes isophorone diisocyanate,hexamethylene diisocyanate and its trimer) healing in moisture environment. Following that,the factors(core material,mechanical property of microcapsules and its compatibility with substrate) influencing self-healing properties of microcapsules-based self-healing polymeric materials are briefly discussed. Finally,the future research directions,eg. establishment of self-healing process models and applications of microcapsules to material with microstructure such as grain boundary,porosity,are pointed out and the application prospects(improving the reliability of some high-speed high-risk projects such as aerospace and civil high-speed rail,self-healing coatings and adhesives development) of self-healing materials are exhibited.更多还原