Bioactive characterization of packaging foils coated by chitosan and polyphenol colloidal formulations

Potrč, Sanja (author), Sterniša, Meta (author), Smole Možina, Sonja (author), Knez Hrnčič, Maša (author), Fras Zemljič, Lidija (author)

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.

• Language: English
• Keywords: food packaging, PE/PP functionalization, polyphenols, bioactive properties, activity, antimicrobial, antioxidant, chitosan
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publication status: Published
• Publication version: Version of Record
• Year: 2020
• Number of pages: 22 str.
• Numbering: Vol. 21, iss. 7, art. 2610
• PID: 20.500.12556/RUL-133416
• UDC: 66.02
• ISSN on article: 1422-0067
• DOI: 10.3390/ijms21072610
• COBISS.SI-ID: 23115542
• Publication date in RUL: 26.11.2021

Record is a part of a journal

• Title: International journal of molecular sciences
• Shortened title: Int. j. mol. sci.
• Publisher: MDPI
• ISSN: 1422-0067
• COBISS.SI-ID: 2779162

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 09.04.2020

Secondary language

• Language: Slovenian
• Keywords: bioaktivne lastnosti, antioksidanti, antimikrobi, citozan, polifenoli