Abstract
The use of nanomaterials as active fillers in polymeric nanocomposite is an innovative concept to prolong the shelf-life and safety of product for food packaging. This concept is of special importance in the area of fresh and high quality products. Recently new compounds based on the use of nanoparticles and biodegradable polymers developed. Among this material the antimicrobial properties of AgNPs have been exploited in consumer product. Also Chitosan (Cts) is a natural biopolymer with excellent biodegradability and nontoxicity, as well as its solubility in aqueous medium makes it good candidate for food packaging. In this research AgNPs were incorporated in the biodegradable chitosan matrix for applications as food packaging materials. The properties of Ag/Cts nanocomposites were studied as a function of the AgNPs concentration. Mechanical analysis and water vapor barrier properties of AgNPs/Cts nanocomposites were analyzed. It was observed that mechanical and water vapor barrier properties of the films were improved by the ratio of AgNPs. The antibacterial activity of AgNPs/Cts thin films were evaluated based on the diameter of inhibition zone in a disk diffusion test against Gram positive bacteria i.e., Staphylococcus aureus and Bacillus cereus and Gram-negative bacteria, i.e., Escherichia coli and E. Faecalis using Mueller Hinton agar at different ratio of AgNPs. The results revealed a greater bactericidal effectiveness for nanocomposite films containing 5 % w/w of AgNPs.
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© 2014 Springer International Publishing Switzerland
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Zarei, A., Ebrahimiasl, S., Jafarirad, S. (2014). Development of Bactericidal Ag/Chitosan Nanobiocomposites for Active Food Packaging. In: Polychroniadis, E., Oral, A., Ozer, M. (eds) International Multidisciplinary Microscopy Congress. Springer Proceedings in Physics, vol 154. Springer, Cham. https://doi.org/10.1007/978-3-319-04639-6_36
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DOI: https://doi.org/10.1007/978-3-319-04639-6_36
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