Carrageenan-Based Functional Films Integrated with CuO-Doped Titanium Nanotubes for Active Food-Packaging Applications

A titanium dioxide nanotube (TNT) and CuO-doped TNT (TNT-CuO) were synthesized using a hydrothermal method and incorporated into carrageenan-based films. The SEM results confirmed the formation of uniform nanocomposite films. The addition of nanoparticles imparted UV-blocking properties to the carrageenan film and increased the mechanical strength, surface hydrophobicity, and water vapor barrier properties. The modified TiO2 (TNT and TNT-CuO)incorporated carrageenan films showed significantly higher antibacterial activity than the TiO2-added film under visible light. Bananas packaged with the neat carrageenan and TiO2-added films were degraded considerably after 12 days of storage at 20 degrees C. In contrast, bananas packaged with the modified TiO2, especially TNT-CuO-incorporated carrageenan films, retained high quality in terms of weight loss, firmness, and surface color.

Automated summary

Titanium dioxide nanotubes (TNT) and CuO-doped TNT were synthesized and incorporated into carrageenan-based films using a hydrothermal method. The addition of nanoparticles improved UV-blocking properties and mechanical strength of the films. Modified TiO2 incorporated carrageenan films showed higher antibacterial activity and preserved higher fruit quality during storage.