20.500.12556/RUL-134250 Two-layer functional coatings of chitosan particles with embedded catechin and pomegranate extracts for potential active packaging Two-layer functional coatings for polyethylene (PE) and polypropylene (PP) films were developed for the active packaging concept. Prior to coating, the polymer films were activated by O$_2$ and NH$_3$ plasma to increase their surface free energy and to improve the binding capacity and stability of the coatings. The first layer was prepared from a macromolecular chitosan solution, while the second (upper) layer contained chitosan particles with embedded catechin or pomegranate extract. Functionalized films were analyzed physico-chemically to elemental composition using ATR-FTIR spectroscopy and XPS. Further, oxygen permeability and wettability (Contact Angle) were examined. The antimicrobial properties were analyzed by the standard ISO 22196 method, while the antioxidative properties were determined with an ABTS assay. Functionalized films show excellent antioxidative and antimicrobial efficacy. A huge decrease in oxygen permeability was achieved in addition. Moreover, a desorption experiment was also performed, confirming that the migration profile of a compound from the surfaces was in accordance with the required overall migration limit. All these properties indicate the great potential of the developed active films/foils for end-uses in food packaging. plasma chitosan polyphenols coating active packaging plazma hitozan polifenoli aktivno pakiranje true false true Angleški jezik Slovenski jezik Članek v reviji 2022-01-03 15:29:37 2022-01-03 15:29:38 2022-09-13 03:54:11 0000-00-00 00:00:00 2020 0 0 20 str. iss. 9, art. 1855 Vol. 12 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 547.568.5 2073-4360 10.3390/polym12091855 25958403 RAZ_Potrc_Sanja_2020.pdf RAZ_Potrc_Sanja_2020.pdf 1 8FD6403108321B668156AA038BFA6E80 bcf14eb8bb1c3a01506491ce702dfdcd0e8cbaf82f5f82a1119303aec453008d abeb8bc5-6ca1-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=152608 https://www.mdpi.com/2073-4360/12/9/1855 0 81f3e4ff-6ca1-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=152607 Biotehniška fakulteta 0 0 0