The preparation and application of silica encapsulated isophoronediisocyanate (IPDI) as the active healing agent in the coatings fabricated by using of waterborne polyurethane (WPU) is reported. Prepolymer method was used to synthesize WPU, and IPDI loaded silica capsules (SCs) were prepared via interfacial emulsion polymerization. An almost complete recovery of scratches on the coatings containing synthesized SCs loaded with IPDI has been observed. Incorporating of the IPDI loaded SCs not only grants self-healing properties but also improves the thermal stability of WPU coatings. Scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS) and thermal gravimetric analysis (TGA) were used for detection of healing procedure and monitoring of thermal degradation as well as SCs loading content.

报道了二氧化硅包封的异佛尔酮二异氰酸酯（IPDI）作为活性愈合剂在水性聚氨酯（WPU）制备的涂料中的制备和应用。采用预聚物法合成了WPU，并通过界面乳液聚合制备了载有IPDI的二氧化硅胶囊（SCs）。已经观察到，在含有负载了IPDI的合成SC的涂层上，划痕几乎可以完全恢复。掺入IPDI的SC不仅具有自我修复性能，而且还改善了WPU涂料的热稳定性。使用扫描电子显微镜（SEM），电化学阻抗谱（EIS）和热重分析（TGA）来检测愈合过程并监测热降解以及SC的负载量。