期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 92, 期 -, 页码 842-849出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2016.07.107
关键词
Silver nanoparticles; Pectin composite film; Antibacterial activity
资金
- Agriculture Research Center program of the Ministry of Agriculture, Food, and Rural Affairs, Korea [ARC 710003]
Silver nanoparticles (AgNPs) was synthesized by a green method using an aqueous extract of Caesalpinia mimosoides Lamle (CMLE) as reducing and stabilizing agents, and they were used for the preparation of pectin-based antimicrobial composite films. The AgNPs were spherical in shape with the size in the range of 20-80 nm and showed the absorption peak around 500 nm. The pectin/AgNPs composite film exhibited characteristic absorption peak of AgNPs at 480 nm. The surface color and light transmittance of the pectin films were greatly influenced by the addition of AgNPs. The lightness of the films decreased, however, redness and yellowness of the films increased after incorporation of AgNPs. UV-light barrier property of the pectin film increased significantly with a little decrease in the transparency. Though there were no structural changes in the pectin film by the incorporation of CMLE and AgNPs as indicated by the FTIR results, the film properties such as thermal stability, mechanical strength, and water vapor barrier properties of the pectin films increased. The pectin/AgNPs nanocomposite films exhibited strong antibacterial activity against food-borne pathogenic bacteria, Escherichia coli and Listeria monocytogenes. (C) 2016 Elsevier B.V. All rights reserved.
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