Nanocomposites stand out as promising materials in many fields due to their properties such as strength,
hardness, thermal stability, and lightness. Introducing self-healing ability to polymer nanocomposites provides
new guidelines for strong, sustainable, and durable materials. Microcapsule-based self-healing materials work
independently of an external stimulus such as pH, heat, light and solvent. In this paper, we developed autonomously self-healing UV-cured polyurethane graphene oxide nanocomposite coatings by means of efficient and
useful copper-catalyzed azide-alkyne (CuAAC) click chemistry. Low molecular weight tetra-arm azide was successfully capsulated within poly(vinyl formal) capsules. Alkyne functional graphene-oxide reinforced nanocomposites containing azide microcapsules were prepared through photo-polymerization. The self-healing ability
and anti-corrosion properties of the nanocomposites were studied after the damage occurred. The self-healing
experiments show that the microcapsules provided a self-healing efficiency of around 70% after 24 h. Chemical, morphologic, mechanical, and thermal properties of the films were investigated. Furthermore, the electrochemical analysis of films showed that the microcapsule containing films has a higher polarization resistance and
a lower corrosion current.