Preparation of antibacterial coating film using ZnO nanoparticles and epoxy resin

Document Type: Original Research Paper


Department of Chemical Engineering, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran



The production of antibacterial and antifungal nanocomposites is widely used
in pharmaceutical, health, food, packaging and medical industries. Meanwhile,
the epoxy coating film is one of the most commonly used protective coatings in
industrial applications. In this work, ZnO nanoparticles were first synthesized at
three different concentrations. UV-Vis spectroscopy and dynamic light scattering
(DLS) analysis were used to study the nanoparticles properties. The results showed
that nanoparticles were synthesized with a mean size of 46 nm at 0.01 M zinc
sulfate. Then, the nanoparticles were mixed with epoxy at three concentrations
and finally ZnO/epoxy nanocomposite were prepared. X-ray diffraction (XRD)
and Scanning electron microscopy (SEM) confirmed the existence and size of
nanoparticles in epoxy film. The disk diffusion method was used to study the
antibacterial activity of ZnO-epoxy nanocomposites against Escherichia coli
(E. coli) and Staphylococcus aureus (S. aureus). The results exhibited that the
optimum antibacterial activity was in nanocomposite films with concentration
0.01 M of zinc sulfate.