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Article

Development of Biodegradable Whey-Based Laminate Functionalised by Chitosan–Natural Extract Formulations

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Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia
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Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia
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Department of Food Science and Technology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia
*
Authors to whom correspondence should be addressed.
Int. J. Mol. Sci. 2020, 21(10), 3668; https://doi.org/10.3390/ijms21103668
Received: 23 April 2020 / Revised: 14 May 2020 / Accepted: 15 May 2020 / Published: 22 May 2020
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. View Full-Text
Keywords: whey laminate; functionalization; active packaging; chitosan; plant extracts; antimicrobial; antioxidant whey laminate; functionalization; active packaging; chitosan; plant extracts; antimicrobial; antioxidant
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MDPI and ACS Style

Potrč, S.; Fras Zemljič, L.; Sterniša, M.; Smole Možina, S.; Plohl, O. Development of Biodegradable Whey-Based Laminate Functionalised by Chitosan–Natural Extract Formulations. Int. J. Mol. Sci. 2020, 21, 3668. https://doi.org/10.3390/ijms21103668

AMA Style

Potrč S, Fras Zemljič L, Sterniša M, Smole Možina S, Plohl O. Development of Biodegradable Whey-Based Laminate Functionalised by Chitosan–Natural Extract Formulations. International Journal of Molecular Sciences. 2020; 21(10):3668. https://doi.org/10.3390/ijms21103668

Chicago/Turabian Style

Potrč, Sanja, Lidija Fras Zemljič, Meta Sterniša, Sonja Smole Možina, and Olivija Plohl. 2020. "Development of Biodegradable Whey-Based Laminate Functionalised by Chitosan–Natural Extract Formulations" International Journal of Molecular Sciences 21, no. 10: 3668. https://doi.org/10.3390/ijms21103668

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