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Journal of Applied Polymer Science

Journal of Applied Polymer Science

IF: 2.7
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Properties and antimicrobial activities of starch–sodium alginate composite films incorporated with sodium dehydroacetate or rosemary extract

Published:10 May 2012 DOI: 10.1002/app.37570
Qianqian Yan, Jinli Zhang, Haizhou Dong, Hanxue Hou, Pei Guo

Abstract

Antimicrobial films were prepared with oxidized and acetylated corn starch–sodium alginate by incorporating sodium dehydroacetate or rosemary extract. Films incorporated with sodium dehydroacetate ≥ 0.1% or rosemary extract ≥ 0.3% had an anti-Escherichia coli effect. Aspergillus niger could be effectively inhibited by the incorporation of sodium dehydroacetate ≥ 0.3%. Rosemary extract showed no inhibitory effect on Aspergillus niger. Sodium dehydroacetate and rosemary extract reduced the tensile strength and elongation at break, and increased the water vapor permeability of the films. Sodium dehydroacetate made the films more greenish–yellow with the increase of sodium dehydroacetate concentration. The color of the films became darker and more reddish–yellow as rosemary extract was increased. Fourier transform infrared (FTIR) spectra analysis revealed that sodium dehydroacetate and rosemary extract reduced starch crystallinity. The surface of the films became rougher as a result of an addition of sodium dehydroacetate and rosemary extract. These findings had potential applications in prolonging food shelf life based on different needs. ? 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

Substances (2)

Related products
Procduct Name CAS Molecular Formula Supplier Price
Sodium dehydroacetate 4418-26-2 C8H7NaO4 402 suppliers $24.00-$10498.95
Rosemary extract 42 suppliers Inquiry

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