The use of renewable resources for the development of coating materials is a viable means to reduce
environmental impact and support sustainability efforts. This paper describes a novel antimicrobial
polyesteramide-urethane-silica- Zinc Oxide (ZnO) hybrid coatings based on milk bush seed oil as
renewable resource. Initially ZnO nanoparticles were modified with aminopropyltrimethoxysilane to get
silica grafted ZnO composite particles. The milk bush oil based polyesteramide were reacted with
excess H12MDI to get NCO terminated polyesteramide-urethanes and the excess NCO was reacted
with silica grafted ZnO composite particles to get the reactive hybrid prepolymers. These prepolymers
were casted on tin foil and cured under atmospheric moisture to get eco-friendly moisture curing
polyesteramide-urethane-silica- Zinc Oxide (ZnO) hybrid coatings films. The coatings films were
evaluated for its antimicrobial and thermo mechanical properties while coated steel specimen were
used for corrosion studies. The techniques such as FTIR, TGA, DSC, DMTA, SEM and XRD have been
used in this study. The hybrid coating films has shown very good antibacterial and antifungal propertie$,
higher thermal stability and better thermo mechanical properties. The improvement in the properties
was dependent" on the concentration of ZnO composite particles in the coating films. The antibacterial
experiments show that the ZnO doped films exhibit excellent antibacterial activity, especially for E.coli.
The salt spray test on coated specimen show good corrosion resistance properties for hybrid coating
