Researchers from Spain used castor oil as a matrix material to prepare biocompatible and biodegradable nanocomposite films filled with chitosan modified ZnO nanoparticles for wound healing. The biocomposites were prepared by solution mixing and casting method. The morphology, structure and wound healing properties of 
the films were analysed. The antibacterial activity of the films were investigated in the presence and absence of UV light.
Results showed that the antibacterial activity was stronger against gram positive bacteria. Composites with nanoparticle loading enabled faster wound healing thus showing the potential to be applied as antibacterial wound dressings.