基于DES塑化和cyclodextrin-encapsulated肉桂精油的多功能羧甲基纤维素钠/PVA复合膜水果保鲜

Conventional food packaging materials suffer from poor humidity regulation, low active-component stability, and limited functionality. To address these issues, we fabricated a moisture-regulating active composite film based on a polyvinyl alcohol/sodium carboxymethyl cellulose (PVA/CMC-Na) matrix, incorporating a choline chloride/lactic acid deep eutectic solvent (DES) to modulate hydrogen-bonding networks, and β-cyclodextrin-encapsulated cinnamon essential oil (CEO) to provide antibacterial and antioxidant activity. The film structure and properties were characterized by FTIR, XRD, TG, and SEM, and evaluated for mechanical, barrier, antibacterial, antioxidant, biocompatibility, and fruit preservation performance. Results showed that DES may have modulated the intermolecular hydrogen-bonding network, facilitating water vapor adsorption and diffusion. CEO inclusion complexes dispersed uniformly, enhancing stability and bioactivity. The composite films exhibited antibacterial rates >96% against E. coli and S. aureus, strong ABTS/DPPH radical scavenging activity, and in vitro cytocompatibility. The films also showed reversible moisture absorption-desorption behavior and a humidity-dependent increase in extractable CEO content. In fruit preservation tests, the films inhibited microbial growth and oxidative deterioration, with PC-DES-10IC showing improved preservation performance. This combination of moisture regulation and antibacterial activity contributes to the improved preservation performance of the composite film. Overall, our composite film offers a promising strategy for high-respiring produce packaging.