Next Article in Journal
Photothermal Effects and Heat Conduction in Nanogranular Silicon Films
Previous Article in Journal
Constitutive Description of Extra Strengthening in Gradient Nanotwinned Metals
Previous Article in Special Issue
Recent Advances in the Development of Smart and Active Biodegradable Packaging Materials
Article

Antibacterial Biodegradable Films Based on Alginate with Silver Nanoparticles and Lemongrass Essential Oil–Innovative Packaging for Cheese

1
Faculty of Applied Chemistry and Material Science, University Politehnica of Bucharest, 060042 Bucharest, Romania
2
Academy of Romanian Scientists, 050045 Bucharest, Romania
3
Microbiology & Immunology Department, Faculty of Biology, University of Bucharest, 077206 Bucharest, Romania
*
Author to whom correspondence should be addressed.
Academic Editor: Sabbatini Luigia
Nanomaterials 2021, 11(9), 2377; https://doi.org/10.3390/nano11092377
Received: 15 August 2021 / Revised: 6 September 2021 / Accepted: 8 September 2021 / Published: 13 September 2021
(This article belongs to the Special Issue Food Packaging Bionanocomposites)
Replacing the petroleum-based materials in the food industry is one of the main objectives of the scientists and decision makers worldwide. Biodegradable packaging will help diminish the environmental impact of human activity. Improving such biodegradable packaging materials by adding antimicrobial activity will not only extend the shelf life of foodstuff, but will also eliminate some health hazards associated with food borne diseases, and by diminishing the food spoilage will decrease the food waste. The objective of this research was to obtain innovative antibacterial films based on a biodegradable polymer, namely alginate. Films were characterized by environmental scanning electron microscopy (ESEM), Fourier-transform infrared spectroscopy (FTIR) and microscopy, complex thermal analysis (TG-DSC-FTIR), UV-Vis and fluorescence spectroscopy. Water vapor permeability and swelling behavior were also determined. As antimicrobial agents, we used silver spherical nanoparticles (Ag NPs) and lemongrass essential oil (LGO), which were found to act in a synergic way. The obtained films exhibited strong antibacterial activity against tested strains, two Gram-positive (Bacillus cereus and Staphylococcus aureus) and two Gram-negative (Escherichia coli and Salmonella Typhi). Best results were obtained against Bacillus cereus. The tests indicate that the antimicrobial films can be used as packaging, preserving the color, surface texture, and softness of cheese for 14 days. At the same time, the color of the films changed (darkened) as a function of temperature and light presence, a feature that can be used to monitor the storage conditions for sensitive food. View Full-Text
Keywords: biodegradable; alginate film; antibacterial packaging; lemongrass essential oil; silver nanoparticles; edible packaging; cheese; time-temperature indicator (TTI) biodegradable; alginate film; antibacterial packaging; lemongrass essential oil; silver nanoparticles; edible packaging; cheese; time-temperature indicator (TTI)
Show Figures

Graphical abstract

MDPI and ACS Style

Motelica, L.; Ficai, D.; Oprea, O.-C.; Ficai, A.; Ene, V.-L.; Vasile, B.-S.; Andronescu, E.; Holban, A.-M. Antibacterial Biodegradable Films Based on Alginate with Silver Nanoparticles and Lemongrass Essential Oil–Innovative Packaging for Cheese. Nanomaterials 2021, 11, 2377. https://doi.org/10.3390/nano11092377

AMA Style

Motelica L, Ficai D, Oprea O-C, Ficai A, Ene V-L, Vasile B-S, Andronescu E, Holban A-M. Antibacterial Biodegradable Films Based on Alginate with Silver Nanoparticles and Lemongrass Essential Oil–Innovative Packaging for Cheese. Nanomaterials. 2021; 11(9):2377. https://doi.org/10.3390/nano11092377

Chicago/Turabian Style

Motelica, Ludmila, Denisa Ficai, Ovidiu-Cristian Oprea, Anton Ficai, Vladimir-Lucian Ene, Bogdan-Stefan Vasile, Ecaterina Andronescu, and Alina-Maria Holban. 2021. "Antibacterial Biodegradable Films Based on Alginate with Silver Nanoparticles and Lemongrass Essential Oil–Innovative Packaging for Cheese" Nanomaterials 11, no. 9: 2377. https://doi.org/10.3390/nano11092377

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop