Document Detail


Novel silver-based nanoclay as an antimicrobial in polylactic acid food packaging coatings.
MedLine Citation:
PMID:  20711905     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This paper presents a comprehensive performance study of polylactic acid (PLA) biocomposites, obtained by solvent casting, containing a novel silver-based antimicrobial layered silicate additive for use in active food packaging applications. The silver-based nanoclay showed strong antimicrobial activity against Gram-negative Salmonella spp. Despite the fact that no exfoliation of the silver-based nanoclay in PLA was observed, as suggested by transmission electron microscopy (TEM) and wide angle X-ray scattering (WAXS) experiments, the additive dispersed nicely throughout the PLA matrix to a nanoscale, yielding nanobiocomposites. The films were highly transparent with enhanced water barrier and strong biocidal properties. Silver migration from the films to a slightly acidified water medium, considered an aggressive food simulant, was measured by stripping voltammetry. Silver migration accelerated after 6 days of exposure. Nevertheless, the study suggests that migration levels of silver, within the specific migration levels referenced by the European Food Safety Agency (EFSA), exhibit antimicrobial activity, supporting the potential application of this biocidal additive in active food-packaging applications to improve food quality and safety.
Authors:
Maria A Busolo; Patricia Fernandez; Maria J Ocio; Jose M Lagaron
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment     Volume:  27     ISSN:  1944-0057     ISO Abbreviation:  Food Addit Contam Part A Chem Anal Control Expo Risk Assess     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-09-13     Completed Date:  2011-01-27     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101485040     Medline TA:  Food Addit Contam Part A Chem Anal Control Expo Risk Assess     Country:  England    
Other Details:
Languages:  eng     Pagination:  1617-26     Citation Subset:  IM    
Affiliation:
Novel Materials and Nanotechnology Group, IATA-CSIC, Burjassot (Valencia), 46980 Paterna, Spain.
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MeSH Terms
Descriptor/Qualifier:
Anti-Bacterial Agents / chemistry*,  pharmacology*
Calorimetry, Differential Scanning
Electrochemical Techniques
Food Contamination / prevention & control
Food Microbiology
Food Packaging / methods*
Food Preservation / methods
Lactic Acid / chemistry*
Metal Nanoparticles / chemistry*,  ultrastructure
Microbial Sensitivity Tests
Microscopy, Electron, Transmission
Nanotechnology
Permeability
Polymers / chemistry*
Salmonella / drug effects
Silicates / chemistry
Silver Compounds / chemistry*,  pharmacology*
Steam
Temperature
Time Factors
Chemical
Reg. No./Substance:
0/Anti-Bacterial Agents; 0/Polymers; 0/Silicates; 0/Silver Compounds; 0/Steam; 26100-51-6/poly(lactic acid); 50-21-5/Lactic Acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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