期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 105, 期 -, 页码 1636-1643出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2017.02.008
关键词
Corn starch; Chitosan; Mechanical properties; Barrier properties
资金
- National Natural Science Foundation of China [51405188]
- Plan of Science and Technology Development of Jilin Province of China [20140520104JH]
- China Postdoctoral Science Foundation [2013M540253, 2015T80307]
The active packaging films based on corn starch and chitosan were prepared through mixing the starch solution and the chitosan solution (1:1) by casting. The aim of this work was to characterize and analyze the effects of the chitosan concentrations (0, 21,41, 61 and 81 wt% of starch) on physicochemical, mechanical and water vapor barrier properties as well as morphological characteristics of the corn starch/chitosan (CS/CH) films. Starch molecules and chitosan could interact through hydrogen bonding as confirmed from the shift of the main peaks to higher wavenumbers in FTIR and the reduction of crystallinity in XRD. Results showed that the incorporation of chitosan resulted in an increase in film solubility, total color differences, tensile strength and elongation at break and a decrease in Young's modulus and water-vapor permeability (WVP). Elongation at break of the CS/CH films increased with increasing of chitosan concentration, and reached a maximum at 41 wt%, then declined at higher chitosan concentration. The WVP of CS/CH films increased with an increase of chitosan concentration and the same tendency observed for the moisture content. The results suggest that this biodegradable CS/CH films could potentially be used as active packaging films for food and pharmaceutical applications. (C) 2017 Elsevier B.V. All rights reserved.
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