Document Detail


Silver-based antimicrobial ethylene-vinyl alcohol copolymer (EVOH) films of interest in active food packaging applications.
MedLine Citation:
PMID:  22577863     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The use of silver as an antimicrobial in the food area has raised wide interest in recent years. In the present work, 0.001-10 wt.-% silver ions were satisfactorily incorporated into an ethylene vinyl alcohol (EVOH) copolymer matrix by a solvent casting technique. The antibacterial efficacy of the composite was evaluated under laboratory conditions and in contact with some foods. The ionic compound did not affect the crystallinity or the water-induced plasticization of the materials and was homogeneously distributed across the surface and thickness of the films. When immersed in water, sorption induced release of 50-100% of silver ions took place in less than 30 minutes. In the bacterial minimal growth medium M9, minimal inhibitory concentration (MIC) of the film was in the range of 0.01-0.1 ppm. High protein content food samples displayed low susceptibility to the films (<1 log reduction in any case), while low protein content food samples exhibited no detectable bacterial counts for films with 1 wt.-% and 10 wt.-% and about 2 log reduction for films with 0.1 wt.-% silver. These results represent a step forward in the understanding of silver antimicrobial efficacy and its possible application in the food packaging industry most likely as food coatings.
Authors:
Antonio Martinez-Abad; Jose-Maria Lagaron; Maria Jose Ocio
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-12
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  -     ISSN:  1520-5118     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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