Synergistic effects of TiO2-ZnO/Poly(methyl methacrylate) nanocomposite films: Enhanced wettability, antimicrobial activity, and biocompatibility

Abstract

The poly (methyl methacrylate) (PMMA) nanocomposite films were fabricated using a cost-effective solvent evaporation method. The dominance of the wurtzite Zinc oxide (ZnO) phase was observed, accompanied by a suppression in the phase intensity of anatase titanium dioxide (TiO2) in the PMMA matrix confirmed by the XRD. New peaks appeared at 1651 cm−1 for the Ti-OH of TiO2 and 590 cm−1 for the metal–oxygen vibration of ZnO in the nanocomposite films. SEM micrograph of the TZPMMA resulted in the formation of nanopores with the nanoparticles embedded in the PMMA matrix. The wettability was enhanced by 23 % with the incorporation of metallic nanoparticles. Zinc ions increased antimicrobial susceptibility against S. aureus by 20 % more than E. coli, demonstrating the potential for fighting bacterial infections. The porous surface created by the nanoparticles improved the cell viability of the PMMA. Zebrafish embryo mortality percentage (0.5 %) and cell viability percentage (80 %) against human gingival fibroblasts (hGFs) showed that the incorporation of metal oxides made the PMMA, a potential candidate for biomedical applications.