Design and Functional Characterisation of Bio-Based Multilayer Polylactic Acid Films Incorporating Chitosan and Propolis for Antimicrobial Food Packaging Applications
: The development of renewable and bio-based materials with functional performance comparable to conventional plastics remains a key challenge in sustainable packaging. In this study, bio-based multilayer films were fabricated using polylactic acid (PLA) as a renewable polyester substrate, combined with chitosan (CS) a...