20.500.12556/RUL-133416 Bioactive characterization of packaging foils coated by chitosan and polyphenol colloidal formulations Polypropylene (PP) and polyethylene (PE) foils, previously activated by ultraviolet (UV)/ozone, were functionalized using chitosan-extract nanoparticle dispersions. A solution of macromolecular chitosan was applied onto foils as a first layer, followed by the deposition of various extracts encapsulated into chitosan nanoparticles, which were attached as an upper layer. Functionalized foils were analyzed from a bioactive point of view, i.e., regarding antimicrobial and antioxidant activity. Desorption kinetics were also studied. Moreover, barrier properties were examined, as the most important parameter influencing antimicrobial and antioxidant activity. Finally, all these properties were correlated with different surface parameters, determined previously, in order to understand if there is any direct correlation between surface elemental composition, surface charge, contact angle, or morphology and a specific bioactive property. It was shown that great bioactive properties were introduced due to the additive effect of antimicrobial chitosan and antioxidative plant extracts. Moreover, oxygen permeability decreased significantly, and the migration of polyphenols and chitosan from the foil surface was below the OML (overall migration limit), which is very important for food industry applications. Furthermore, surface properties of foils influence to some extent the desired bioactivity. food packaging PE/PP functionalization polyphenols bioactive properties activity antimicrobial antioxidant chitosan bioaktivne lastnosti antioksidanti antimikrobi citozan polifenoli true false true Angleški jezik Slovenski jezik Članek v reviji 2021-11-26 09:22:10 2021-11-26 09:22:11 2022-09-12 04:16:15 0000-00-00 00:00:00 2020 0 0 22 str. iss. 7, art. 2610 Vol. 21 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 66.02 1422-0067 10.3390/ijms21072610 23115542 RAZ_Potrc_Sanja_2020.pdf RAZ_Potrc_Sanja_2020.pdf 1 DC2CE94495E1F0CBC12A030E7A159C83 d70efd1e7ecbf85f0199476db697c21a220feb683bbf96b4e9b6338119034011 16a461c2-4e92-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=151459 https://www.mdpi.com/1422-0067/21/7/2610 0 0be074b7-4e92-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=151458 Biotehniška fakulteta 0 0 0