Authors:
Lucica Maria Pop, Lidija Jakobek, Anca Mihaly Cozmuța, Camelia Nicula, Leonard Mihaly Cozmuța, Anca Peter
Volume 30, Issue 4;
Pages: 423-432; 2024
ISSN: 2069-0053 (print), Agroprint;
ISSN (online): 2068-9551
Abstract
The aim of this study was to obtain biodegradable packaging materials based on polyvinyl alcohol modified with bioactive compounds with antioxidants and antimicrobial properties to obtain a potential packaging material that extends the shelf life of the food and ensures the quality and safety of food. To impart these properties to the polyvinyl alcohol film, natural extracts of apple peel, aronia and rutin, respectively were used. The analysis of the polyphenolic compounds of the extracts was carried out by high performance liquid chromatography, the Folin-Ciocalteu method was used to calculate total polyphenols released from prepared films and the antioxidant activity was determined with 2,2 diphenyl-1-picrylhydrazyl method. The antimicrobial activity of extracts was tested against Staphylococcus aureus bacteria isolated from goat's milk. The results obtained indicated that aronia extract had the highest content of polyphenols with 462.3 mg/L, predominantly neochlorogenic acid. Also, the release of total polyphenols was higher for polyvinyl alcohol-based film modified with aronia extract. Consequently, the highest antioxidant activity was obtained by the modified film with aronia extract. The rutin modified polyvinyl alcohol film showed the best antimicrobial activity. Polyvinyl alcohol films modified with aronia and rutin could represent potential packaging materials for foods with high risk of oxidation, but it requires more in-depth studies.
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