Portal de Periódicos da CAPES

Quaternary ammonium chitosan-based active packaging films incorporated with dialdehyde guar gum-proanthocyanidins conjugates: characterization and application in the edible coating of pork

2024; Elsevier BV; Volume: 158; Linguagem: Inglês

10.1016/j.foodhyd.2024.110597

1873-7137

Bixue Sun, Fengfeng Xu, Dan Chen, Jun Liu,

Consumer Packaging Perceptions and Trends

In this study, antioxidant and antibacterial proanthocyanidins (PA) were covalently conjugated with dialdehyde guar gum (DGG) to produce DGG-PA conjugates. Then DGG-PA conjugates were incorporated into quaternary ammonium chitosan (QAC)-based matrix to create QAC/DGG-PA films. The structure, physicochemical properties, and antioxidant and antibacterial effects of DGG-PA conjugates and QAC/DGG-PA films were analyzed. The active packaging potentials of QAC/DGG-PA film-forming solutions in the edible coating of pork loins were evaluated. Results showed DGG-PA conjugates had unique UV absorption peak (280 nm), infrared bands (1610 and 1521 cm−1) and proton nuclear magnetic resonance signals (6.82 ppm) of PA groups. DGG-PA conjugates showed amorphous state with sheet-like and fibrous morphology. DGG-PA conjugates had good biocompatibility and antioxidant and antibacterial effects. After adding DGG-PA conjugates, the surface of QAC-based films became smooth and the crystallographic nature of the films declined. DGG-PA conjugates elevated the light/water vapor/oxygen barrier performances, mechanical properties, and antioxidant and antibacterial effects of QAC-based films. QAC/DGG-PA edible coatings effectively prolonged the shelf life of pork loins from 4 days to 6−10 days. Results verified QAC/DGG-PA films and their film-forming solutions had good application potentials in active packaging.