Sodium Alginate-Based Antibacterial Coatings Reinforced with Quaternized Lignin-Cinnamaldehyde Composite Particles for Fruit Preservation.

ABSTRACT: Sodium alginate (SA) is widely used as an edible coating for fruit preservation, but its weak water barrier and antibacterial properties limit broader application. In this study, quaternary ammonium lignin-cinnamaldehyde (QKC) composite particles were incorporated into SA as multifunctional fillers to construct antibacterial coatings. Electrostatic and hydrogen-bonding interactions between cationic QKC and anionic SA yielded a uniform, stable network with improved hydrophobicity and UV-shielding capacity. At 5 wt% QKC loading (SA5), the tensile strength increased from 11.53 to 24.42 MPa (111.8% higher than SA0), while water vapor permeability decreased by 35.4%. SA coatings also exhibited strong antioxidant activity, and the ABTS radical scavenging rate increased to 70.22% at 7 wt% QKC, wi

SUBMITTER: Miao J 

PROVIDER: S-EPMC12731641 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature