Development of biodegradable whey-based laminate functionalised by chitosan-natural extract formulations

Potrč, Sanja (author), Fras Zemljič, Lidija (author), Sterniša, Meta (author), Smole Možina, Sonja (author), Plohl, Olivija (author)

In this research, antimicrobial polysaccharide chitosan and natural extracts were used as surface coating of a plastic laminate with an integrated whey layer on the inside. The aim was to establish the biodegradable and active concept of packaging laminates. For this purpose, chitosan nanoparticles (CSNPs) with embedded rosemary or cinnamon extracts were synthesised and characterised. Additionally, a whey-based laminate was functionalised: i) chitosan macromolecular solution was applied as first layer and ii) cinnamon or rosemary extracts encapsulated in CSNPs were applied as upper layer (layer wise deposition). Such functionalised whey-based laminate was physicochemically characterized in terms of elemental surface composition, wettability, morphology and oxygen permeability. The antimicrobial activity was tested against Staphylococcus aureus, Escherichia coli, Aspergillus flavus and Penicillium verrucosum. The antioxidant properties were determined using the ABTS assay. It could be shown that after functionalization of the films with the above-mentioned strategy, the wettability was improved. Furthermore, such whey-based laminates still show excellent barrier properties, good antimicrobial activity and a remarkable antioxidative activity. In addition to the improved biodegradability, this type of lamination could also have a positive effect on the shelf-life of products packaged in such structured films.

• Language: English
• Keywords: whey laminate, functionalization, active packaging, chitosan, plant extracts, antimicrobial, antioxidants
• 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: 19 str.
• Numbering: Vol. 21, iss. 10, art. 3668
• PID: 20.500.12556/RUL-133688
• UDC: 677.017:577
• ISSN on article: 1422-0067
• DOI: 10.3390/ijms21103668
• COBISS.SI-ID: 16763907
• Publication date in RUL: 09.12.2021

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: 22.05.2020

Secondary language

• Language: Slovenian
• Keywords: funkcionalizacija, aktivna embalaža, hitozan, rastlinski izvlečki, antimikrobna učinkovitost, antioksidanti