期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 68, 期 -, 页码 258-266出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2014.05.011
关键词
Carrageenan; Grapefruit seed extract; Composite film; Active packaging; Antimicrobial activity
资金
- Agriculture Research Center program of the Ministry for Agriculture, Food and Rural Affairs, Korea [ARC 710003]
Carrageenan-based antimicrobial films were developed by incorporation of grape fruit seed extract (GSE) at different concentration into the polymer using a solvent casing method and their physical, mechanical, and antimicrobial properties were examined. The carrageenan/GSE composite films appeared yellowish tint due to the polyphenolic compounds in the GSE. SEM analysis showed rough surface with sponge like structures on the cross section of the films. FT-IR results indicated at GSE had good compatibility with carrageenan. The amorphous structure of polymer films was not changed by the incorporation of GSE. But, the addition of GSE increased moisture content, water vapor permeability, and surface hydrophilicity of the films. The tensile strength and elastic modulus decreased with increasing content of GSE, however, the elongation at break increased significantly up to 6.6 mu g/mL of GSE then decreased thereafter. Thermal stability of the films was not influenced by GSE incorporation. The carrageenan/GSE composite films exhibited great antibacterial activity against food borne pathogens. These results suggest that the carrageenan-based composite films have a high potential for being used as an antimicrobial or active food packaging applications. (C) 2014 Elsevier B.V. All rights reserved.
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