Multifunctional cellulose acetate-based smart films with ZIF-8 and curcumin oil for sustainable packaging applications

Biopolymer based cellulose acetate films were developed as a potential eco-friendly alternative to food packaging materials. Cellulose acetate films were synthesized and modified by incorporating ZIF-8 nanoparticles (0.1–0.5 %) along with curcumin oil to enhance their functional properties. Different characterization techniques were performed to check and evaluate physicochemical and barrier properties. The films showed high protection against UV-Vis light by ZIF-8 incorporation along with excellent mechanical properties. WVP and AP testing showed that the barrier properties of the films improved substantially to reach 1.74 g/m²·h WVTR with 3.9 mm/s air permeability. Additionally, these films proved their durability in mechanical tests by showing higher tensile strength and elongation at break. These films also demonstrated excellent antioxidant activities. The application of curcumin oil-based films is suitable for protecting dry or processed food because they exhibit resistance against moisture and air penetration.