Biocompatible PVA‐GG‐MgO Nanocomposite Films: Enhanced Antibacterial and Antioxidant Properties for Potential Food Packaging Applications

This work describes the fabrication of a hybrid film based on polyvinyl alcohol (PVA), guar gum (GG), and nanostructured magnesium oxide (MgO) for its uses in the packaging sector. The nanostructured MgO was synthesized by the precipitation method using Boerhavia diffusa (BD) leaf extract as a stabilizing and reducing agent. The presence of phytochemicals in the leaf extract was confirmed by mass spectrometric analysis. A variety of characterization methods were used to identify the MgO‐based nanomaterial. The MgO‐based nanomaterial's SEM examination revealed a structure that resembled a flower. The various functional groups in the hybrid films and PVA, GG, and MgO‐based nanomaterials were confirmed by Fourier transform infrared (FTIR) spectroscopy. The PVA matrix's mechanical qualities, moisture absorption, aqueous stability, and thermal stability were enhanced by the addition of GG and MgO‐based nanomaterials. The hybrid film demonstrated 100% bactericidal effectiveness and 17.3% ± 3.9% antioxidant activity, according to the results of the antibacterial and DPPH assays, respectively. The food preservation test demonstrated that the PVA‐GG‐MgO4% film can preserve the cherries ( Prunus avium ) better up to day 7 compared to the PVA film, while its performance was comparable to that of aluminum foil. These results clearly indicate that the developed hybrid film could be suited for packaging applications.