Synthesis of isophorene diisocyanate (core)-poly urethane (shell) microcapsules as non-catalyst healing agent in self-healing coatings

Microcapsules containing isophorene diisocyanate (IPDI) for use in self-healing polymers were successfully fabricated via interfacial polymerization of polyurethane (PU). The preparation of PU prepolymer and microencapsulation of IPDI healing agent was proved by Fourier Transform Infra-Red (FTIR) and Thermo-Gravimetric Analysis (TGA). Scanning Electron Microscope (SEM) was shown smooth spherical microcapsules of 1.5-2 μm with shell thickness of 200-300 nm in diameter was produced.