Phen@TiO2 modified epoxy resin/polyacrylate IPN composite coating towards wear/corrosion resistance and intelligent self-repairing/diagnosis

Epoxy resin/polyacrylate interpenetrating polymers network (IPN) composite coating shows excellent mechanical properties, high thermal stability, and weather resistance, but it fails to meet the protective requirements under extreme environments. Herein, TiO 2 core-shell particles impregnated with 1,10-phenanthroline monohydrate (Phen@TiO 2 ) were successfully prepared and introduced into IPN as corrosion inhibitor and indicator. The anti-wear, anti-corrosion, self-repairing/diagnosis, and UV-resistance properties of the IPN composite coatings were evaluated in detail, and the strengthening mechanisms of Phen@TiO 2 were explored. The results show that the wear rate of IPN-2.0CS(Ti) composite coating is 47 % lower than that of pure IPN. Furthermore, the IPN-2.0CS(Ti) composite coating shows the dual-function of self-repairing and self-diagnosis once the coating is damaged. The enhanced anti-wear/corrosion and self-repairing/diagnosis properties of IPN composite coatings are contributed to the introduction of mesoporous TiO 2 and the controllable release of Phen from Phen@TiO 2 . This work provides a new thinking for the design and application of high-performance intelligent protective coatings. • The Phen-loaded mesoporous TiO 2 modified by PEI/PSS polyelectrolyte layer was successfully prepared. • The as-prepared intelligent composite coating incorporated with Phen@TiO 2 exhibited excellent anti-wear/corrosion, UV resistance, and self-repairing/diagnose properties. • The Phen@TiO 2 has a wide application prospect in multi-function intelligent coating for practical application.