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Physical, mechanical, and antibacterial characteristics of bio-nanocomposite films loaded with Ag-modified SiO2 and TiO2 nanoparticles.
J Food Sci. 2020 Apr; 85(4):1193-1202.JF

Abstract

In this study, starch-based films incorporating metal oxide (MO2) nanoparticles (NPs) of TiO2 and SiO2 (at a concentration of 1 to 4 wt. %) were produced by solution casting method. In order to exhibit antimicrobial properties, MO2 NPs were modified by synthesizing silver (Ag) ions over the NPs using cationic adsorption method. Ag ions were then reduced to metallic Ag by sodium borohydride solution. Scanning electron microscopy showed a smooth surface for the pure starch film. Incorporating MO2 @Ag NPs in the films increased surface roughness with agglomerated NPs within starch matrix. Energy dispersive X-ray analysis exhibited a uniform dispersion of Ag-loaded MO2 NPs, which increases surface contact between these NPs and the biopolymer matrix leading to improved physical and mechanical properties of the resulting films. With increasing in the NPs concentrations, the tensile strength and elongation at break % of the films increased and decreased, respectively. Incorporating MO2 @Ag NPs into starch matrix decreased solubility in water and water vapor permeability of the obtained films, and significantly inhibited the growth of Escherichia coli and Staphylococcus aureus. The most antibacterial effect was obtained for the films containing higher weight concentrations of Ag-loaded SiO2 -NPs.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Hajizadeh H
Faculty of Chemical and Petroleum Engineering, Univ. of Tabriz, Tabriz, 51666-16471, Iran.
Peighambardoust SJ
Faculty of Chemical and Petroleum Engineering, Univ. of Tabriz, Tabriz, 51666-16471, Iran.
Peighambardoust SH
Dept. of Food Science, College of Agric., Univ. of Tabriz, Tabriz, 51666-16471, I.R., Iran.
Peressini D
Dept. of Agriculture, Food, Environmental and Animal Sciences, Univ. of Udine, via Sondrio 2/A, 33100, Udine, Italy.

MeSH

Anti-Bacterial AgentsEscherichia coliNanocompositesNanoparticlesPermeabilitySilicon DioxideSilverSolubilityStaphylococcus aureusTensile StrengthTitanium

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32144762

Citation

Hajizadeh, Hamed, et al. "Physical, Mechanical, and Antibacterial Characteristics of Bio-nanocomposite Films Loaded With Ag-modified SiO2 and TiO2 Nanoparticles." Journal of Food Science, vol. 85, no. 4, 2020, pp. 1193-1202.
Hajizadeh H, Peighambardoust SJ, Peighambardoust SH, et al. Physical, mechanical, and antibacterial characteristics of bio-nanocomposite films loaded with Ag-modified SiO2 and TiO2 nanoparticles. J Food Sci. 2020;85(4):1193-1202.
Hajizadeh, H., Peighambardoust, S. J., Peighambardoust, S. H., & Peressini, D. (2020). Physical, mechanical, and antibacterial characteristics of bio-nanocomposite films loaded with Ag-modified SiO2 and TiO2 nanoparticles. Journal of Food Science, 85(4), 1193-1202. https://doi.org/10.1111/1750-3841.15079
Hajizadeh H, et al. Physical, Mechanical, and Antibacterial Characteristics of Bio-nanocomposite Films Loaded With Ag-modified SiO2 and TiO2 Nanoparticles. J Food Sci. 2020;85(4):1193-1202. PubMed PMID: 32144762.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Physical, mechanical, and antibacterial characteristics of bio-nanocomposite films loaded with Ag-modified SiO2 and TiO2 nanoparticles. AU - Hajizadeh,Hamed, AU - Peighambardoust,Seyed Jamaleddin, AU - Peighambardoust,Seyed Hadi, AU - Peressini,Donatella, Y1 - 2020/03/06/ PY - 2019/10/21/received PY - 2020/01/21/revised PY - 2020/01/22/accepted PY - 2020/3/8/pubmed PY - 2020/8/1/medline PY - 2020/3/8/entrez KW - Ag KW - SiO2 KW - TiO2 KW - antibacterial properties KW - bio-nanocomposite films KW - food packaging KW - starch KW - surface modification SP - 1193 EP - 1202 JF - Journal of food science JO - J Food Sci VL - 85 IS - 4 N2 - In this study, starch-based films incorporating metal oxide (MO2) nanoparticles (NPs) of TiO2 and SiO2 (at a concentration of 1 to 4 wt. %) were produced by solution casting method. In order to exhibit antimicrobial properties, MO2 NPs were modified by synthesizing silver (Ag) ions over the NPs using cationic adsorption method. Ag ions were then reduced to metallic Ag by sodium borohydride solution. Scanning electron microscopy showed a smooth surface for the pure starch film. Incorporating MO2 @Ag NPs in the films increased surface roughness with agglomerated NPs within starch matrix. Energy dispersive X-ray analysis exhibited a uniform dispersion of Ag-loaded MO2 NPs, which increases surface contact between these NPs and the biopolymer matrix leading to improved physical and mechanical properties of the resulting films. With increasing in the NPs concentrations, the tensile strength and elongation at break % of the films increased and decreased, respectively. Incorporating MO2 @Ag NPs into starch matrix decreased solubility in water and water vapor permeability of the obtained films, and significantly inhibited the growth of Escherichia coli and Staphylococcus aureus. The most antibacterial effect was obtained for the films containing higher weight concentrations of Ag-loaded SiO2 -NPs. SN - 1750-3841 UR - https://www.unboundmedicine.com/medline/citation/32144762/Physical_mechanical_and_antibacterial_characteristics_of_bio_nanocomposite_films_loaded_with_Ag_modified_SiO2_and_TiO2_nanoparticles_ DB - PRIME DP - Unbound Medicine ER -