LAUSR

BACKGROUNDS PLA has limited uses for moist and acidic foods due to its barrier properties which are fairly poor and its sensitivity to moisture. RESULTS Deposition of thin coatings based on natural biopolymers (gelatin) incorporating bioactive agents allowed to develop active packaging materials while keeping their biodegradability and the food contact allowance. Gelatin coatings containing two phenolic acids (tannic and gallic) have been tested. These coated PLA films displayed a reduction of the moisture permeability and a slight modification of the thermal properties of PLA. Antioxidant properties of films, their release kinetics in a simulant medium have been studied and modelled. CONCLUSIONS Incorporation of the phenolic acids induced interactions with the gelatin that modified the structure of the network which positively affects the retention, diffusivity and transfer rate of the bioactive compounds when coated-PLA films were in contact to the liquid simulant. This article is protected by copyright. All rights reserved.