Antibacterial properties of LDPE nanocomposite films in packaging of UF cheese

The purpose of this study was to investigate antibacterial potential of low-density polyethylene (LDPE) packaging films incorporating silver (Ag), copper oxide (CuO) and zinc oxide (ZnO) nanoparticles in measuring of coliform amounts of ultra-filtrated (UF) cheese. The initial LDPE/nanoparticle comp...

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Bibliographic Details
Published in:Food science & technology 2016-01, Vol.65, p.106-111
Main Authors: Beigmohammadi, Faranak, Peighambardoust, Seyed Hadi, Hesari, Javad, Azadmard-Damirchi, Sodeif, Peighambardoust, Seyed Jamaleddin, Khosrowshahi, Nader Karimian
Format: Article
Language:English
Subjects:
Active packaging
Antibacterial
LDPE film
Nanoparticle
UF cheese
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Summary:The purpose of this study was to investigate antibacterial potential of low-density polyethylene (LDPE) packaging films incorporating silver (Ag), copper oxide (CuO) and zinc oxide (ZnO) nanoparticles in measuring of coliform amounts of ultra-filtrated (UF) cheese. The initial LDPE/nanoparticle composites were produced by melting extrusion followed by extruding the obtained composites through a die to achieve a film thickness of 45 ± 5 μm. The number of surviving coliform bacteria was decreased by 4.21 log cfu/g after 4 weeks of storage at 4 ± 0.5 °C, whilst pure LDPE films showed a reduction of only 1.04 log cfu/g. A composition of 0% Ag, 1% CuO, 0% ZnO gave an optimum point in combined design using Design Expert analysis. A suitable microbial model was suggested for retarding coliform bacteria growth in UF cheese. The difference between the optimum point of nanocomposite film and its repeat was not significant (p 
ISSN:0023-6438
1096-1127
DOI:10.1016/j.lwt.2015.07.059