Development of biodegradable films using sunflower protein isolates and bacterial nanocellulose as innovative food packaging materials for fresh fruit preservation

This study presents the valorization of side streams from the sunflower-based biodiesel industry for the production of bio-based and biodegradable food packaging following circular economy principles. Bacterial cellulose (BC) was produced via fermentation in 6 L static tray bioreactors using nutrien...

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Bibliographic Details
Published in:Scientific reports 2022-04, Vol.12 (1), p.6935-6935, Article 6935
Main Authors: Efthymiou, Maria-Nefeli, Tsouko, Erminta, Papagiannopoulos, Aristeidis, Athanasoulia, Ioanna-Georgia, Georgiadou, Maria, Pispas, Stergios, Briassoulis, Demetres, Tsironi, Theofania, Koutinas, Apostolis
Format: Article
Language:English
Subjects:
631/61/168
631/61/54
639/301/54
639/925/350
Bacteria
Biodegradability
Biodegradation
Biofilms
Biofuels
Bioreactors
Carbon sources
Cellulose
Cellulose - chemistry
Circular economy
Fermentation
Food Packaging
Fruit
Fruits
Glycerol
Helianthus
Humanities and Social Sciences
Hydrolysis
Mechanical properties
multidisciplinary
Packaging materials
Permeability
Preservation
Science
Science (multidisciplinary)
Tensile Strength
Water vapor
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Summary:This study presents the valorization of side streams from the sunflower-based biodiesel industry for the production of bio-based and biodegradable food packaging following circular economy principles. Bacterial cellulose (BC) was produced via fermentation in 6 L static tray bioreactors using nutrient-rich supplements derived from the enzymatic hydrolysis of sunflower meal (SFM) combined with crude glycerol as carbon source. Novel biofilms were produced using either matrices of protein isolates extracted from sunflower meal (SFMPI) alone or SFMPI matrices reinforced with nanocellulose biofillers of commercial or bacterial origin. Acid hydrolysis was employed for ex-situ modification of BC to nanostructures (56 nm). The biofilms reinforced with bacterial nanocellulose structures (SFMPI-BNC) showed 64.5% higher tensile strength, 75.5% higher Young’s modulus, 131.5% higher elongation at break, 32.5% lower water solubility and 14.1% lower water vapor permeability than the biofilms produced only with SFMPI. The biofilms were evaluated on fresh strawberries packaging showing that the SFMPI-BNC-based films lead to effective preservation at 10 °C considering microbial growth and physicochemical profile (weight loss, chemical characterization, color, firmness and respiration activity). The SFMPI-BNC-based films could be applied in fresh fruit packaging applications.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-022-10913-6