Two-layer functional coatings of chitosan particles with embedded catechin and pomegranate extracts for potential active packaging

Potrč, Sanja (author), Kraševac Glaser, Tjaša (author), Vesel, Alenka (author), Poklar Ulrih, Nataša (author), Fras Zemljič, Lidija (author)

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.

• Language: English
• Keywords: plasma, chitosan, polyphenols, coating, active packaging
• 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: 20 str.
• Numbering: Vol. 12, iss. 9, art. 1855
• PID: 20.500.12556/RUL-134250
• UDC: 547.568.5
• ISSN on article: 2073-4360
• DOI: 10.3390/polym12091855
• COBISS.SI-ID: 25958403
• Publication date in RUL: 03.01.2022

Record is a part of a journal

• Title: Polymers
• Shortened title: Polymers
• Publisher: MDPI
• ISSN: 2073-4360
• COBISS.SI-ID: 517951257

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: 01.09.2020

Secondary language

• Language: Slovenian
• Keywords: plazma, hitozan, polifenoli, aktivno pakiranje