An antioxidant composite film based on loquat seed starch incorporating resveratrol-loaded core-shell nanoparticles

A Novel bioactive food packaging film was prepared from non-grain sourced loquat seed starch (LSS) incorporated with resveratrol-loaded nanoparticles (NRs) based on a zein/pectin core-shell system, where the NRs were prepared using the anti-solvent method. The chemical constitution of the LSS was analyzed. The film was characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The physical, optical, and antioxidant properties of the films were also identified. The results showed that incorporating NRs into the films significantly increased antioxidation activity, although simultaneously decreasing light transmission, water content, and elongation at break properties. Furthermore, NRs (15 %) facilitated strong hydrogen bonding interactions with the LSS matrix, improving the barrier properties and tensile strength. The resveratrol release behavior of the composite films in ethanol solutions (10 % and 95 % in water, v/v) as a food simulant was also investigated. The LSS/NRs composite film is effective in delaying unwanted oxidation during the storage of soybean oil. In conclusion, LSS could be applied as a good film-forming matrix, and LSS films containing NRs exhibit excellent physical properties and antioxidant activity, making them ideal for convenience foods containing a grease mixture of spices and grease-class packaging.