Journal
FOOD CHEMISTRY
Volume 173, Issue -, Pages 755-762Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2014.10.068
Keywords
Nanocomposite; Antibacterial; Food packaging; Metal nanoparticles; Quinoa starch
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Active biofilms of quinoa (Chenopodium quinoa, W.) starch were prepared by incorporating gold nanopartides stabilised by an ionic silsesquioxane that contains the 1,4-diazoniabicyclo[2.2.2]octane chloride group. The biofilms were characterised and their antimicrobial activity was evaluated against Escherichia coli and Staphylococcus aureus. The presence of gold nanoparticles produces an improvement in the mechanical, optical and morphological properties, maintaining the thermal and barrier properties unchanged when compared to the standard biofilm. The active biofilms exhibited strong antibacterial activity against food-borne pathogens with inhibition percentages of 99% against E. coli and 98% against S. aureus. These quinoa starch biofilms containing gold nanoparticles are very promising to be used as active food packaging for the maintenance of food safety and extension of the shelf life of packaged foods. (C) 2014 Elsevier Ltd. All rights reserved.
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