期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 70, 期 -, 页码 340-346出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2014.06.039
关键词
Chitosan film; Sorbitol; Physicochemical; Mechanical; Thermal properties
资金
- National Science Foundation of China [31271960]
The effect of sorbitol on the physicochemical, mechanical and thermal properties of chitosan films with different degrees of deacetylation (DD; i.e., DD85% and DD95%) was investigated. The thickness, moisture content (MC), water solubility (WS) and water vapor permeability (WVP) of the films were evaluated. Sorbitol addition reduced MC, increased WS and significantly (p < 0.01) reduced WVP of both film types. DD95% films had lower MC and WVP, and higher WS than DD85% films. Static (thermomechanical analysis) and dynamic (dynamic mechanical analysis) tests indicated that sorbitol increased the strain and decreased stress for both DD films, but DD95% could sustain higher strain and DD85% could sustain higher stress. Thermogravimetrics analysis and differential scanning calorimetry showed that sorbitol elicited a lower degradation temperature for both films, and that DD95% films exhibited higher thermal stability than DD85% films. (C) 2014 Elsevier B.V. All rights reserved.
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