Oxidized pea starch/chitosan composite films: Structural characterization and properties |
| |
| Authors: | Haixia Wu Changhua Liu Jianguang Chen Yun Chen Debbie P Anderson Peter R Chang |
| |
| Affiliation: | 1. College of Chemistry and Chemical Engineering, Southwest University, 400715 Chongqing, China;2. Bioproducts and Bioprocesses National Science Program, Agriculture and Agri‐Food Canada, Saskatoon, SK S7N 0X2, Canada;3. Research Centre for Medical and Structural Biology, School of Basic Medical Science, Wuhan University, Wuhan 430071, China;4. Department of Agricultural and Bioresource Engineering, University of Saskatchewan, Saskatoon, S7N 5A9 SK, Canada |
| |
| Abstract: | In this article, a series of oxidized pea starch/chitosan (OPS/CS) blend films were prepared by a casting and solvent evaporation method. The structure, thermal behavior, and mechanical properties of the films were investigated by means of Fourier transform infrared spectroscopy, wide‐angle X‐ray diffraction, scanning electron microscopy, thermogravimetric analysis, and tensile testing. The results suggested that, in addition to hydrogen bonding, the interactions between OPS and CS molecules were enhanced by the formation of electrostatic interaction between the negatively charged carboxyl groups on OPS and the positively charged amino groups on CS. Compared with the pea starch/chitosan (PS/CS) blend films, OPS/CS blend films exhibited significantly higher tensile strength with significantly lower elongation at break. Moreover, incorporation of CS into the OPS matrix also led to a decrease in moisture uptake by the composite film. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 |
| |
| Keywords: | biodegradable biopolymers chitosan composites polysaccharides |
|
|
