Journal
CARBOHYDRATE POLYMERS
Volume 106, Issue -, Pages 190-199Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2014.02.007
Keywords
Biopolymers; ZnO nanoparticles; Nanocomposite; Antimicrobial activity; Active food packaging
Categories
Funding
- iPET (Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries)
- Ministry for Food, Agriculture, Forestry and Fisheries, Republic of Korea
- Institute of Planning & Evaluation for Technology in Food, Agriculture, Forestry & Fisheries (iPET), Republic of Korea [710003075SB110] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study was aimed to develop biopolymer based antimicrobial films for active food packaging and to reduce environmental pollution caused by accumulation of synthetic packaging. The ZnO NPs were incorporated as antimicrobials into different biopolymers such as agar, carrageenan and CMC. Solvent casting method was performed to prepare active nanocomposite films. Methods such as FE-SEM, FT-IR and XRD were used to characterize resulting films. Physical, mechanical, thermal and antimicrobial properties were also examined. Remarkable surface morphological differences were observed between control and nanocomposite films. The crystallinity of ZnO was confirmed by XRD analysis. The addition of ZnO NPs increased color, UV barrier, moisture content, hydrophobicity, elongation and thermal stability of the films, while decreased WVP, tensile strength and elastic modulus. ZnO NPs impregnated films inhibited growth of L. monocytogertes and E. coll. So these newly prepared nanocomposite films can be used as active packaging film to extend shelf-life of food. (C) 2014 Elsevier Ltd. All rights reserved.
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