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Evaluation of Practical Applicability and Synergistic Effects of Bio-Based Food Packaging Materials Combined with Plant-Based Stabilisers

  • Different analyses and feasibility studies have been conducted on the plant extracts of thyme (Thymus vulgaris), European horse chestnut (Aesculus hippocastanum), Nordmann fir (Abies nordmanniana), and snowdrop (Galanthus elwesii) to evaluate bio‐based alternatives to common petrol‐based stabilisers. For this purpose, in this study, plant extracts were incorporated into poly‐lactic acid films (PLA) at different concentrations. The films’ UV absorbance and migration into packed food was analysed via photometric assays (ABTS radical cation scavenging capacity assay, β‐carotene assay) and GC–MS analysis. Furthermore, the synergistic antioxidant effects of various combinations of extracts and isolated active compounds were determined. This way, antioxidant effects can be increased, allowing for a highly effective use of resources. All extracts were successfully incorporated into PLA films and showed notable photoabsorbing effects, while no migration risk was observed. Depending on extract combinations, high synergistic effects of up to 726% can be utilised to improve the effectiveness of bio‐based extracts. This applies particularly to tomato paste and Aesculus hippocastanum extracts, which overall show high synergistic and antioxidant effects in combination with each other and with isolated active compounds. The study shows that it is possible to create safe bio‐based antioxidant films which show even improved properties when using highlighted target combinations.

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Document Type:Article
Author:Thomas Havelt, Sarah Brettschneider, Michaela Schmitz
Parent Title (English):Processes
Article Number:1838
Number of pages:20
Publishing Institution:Hochschule Bonn-Rhein-Sieg
Date of first publication:2021/10/15
Copyright:© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license
Funding:This research was funded by the European Union via the European Regional Development Fund EFRE.NRW, grant number EFRE 0500035. The APC was funded by the Institute of Technology, Resource and Energy‐Efficient Engineering (TREE) of Bonn‐Rhein‐Sieg University of Applied Sciences, and the Graduate Institute of Bonn‐Rhein‐Sieg University of Applied Sciences.
Keyword:UV absorbance; additive; antioxidant; bio‐based; food contact material; formulation; migration; photostabiliser; stabilisation; synergistic effect
Departments, institutes and facilities:Fachbereich Angewandte Naturwissenschaften
Institut für Technik, Ressourcenschonung und Energieeffizienz (TREE)
Projects:Biobasierte Produkte (EFRE/0500035)
Dewey Decimal Classification (DDC):5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 570 Biowissenschaften; Biologie
6 Technik, Medizin, angewandte Wissenschaften / 68 Industrielle Fertigung für einzelne Verwendungszwecke / 688 Andere Endprodukte, Verpackungstechnik
Open access funding:Hochschule Bonn-Rhein-Sieg / Graduierteninstitut
Entry in this database:2021/10/21
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International