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Oxidized pea starch/chitosan composite films: Structural characterization and properties
Author(s) -
Wu Haixia,
Liu Changhua,
Chen Jianguang,
Chen Yun,
Anderson Debbie P.,
Chang Peter R.
Publication year - 2010
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.32753
Subject(s) - thermogravimetric analysis , chitosan , materials science , ultimate tensile strength , composite number , fourier transform infrared spectroscopy , starch , scanning electron microscope , chemical engineering , casting , polymer chemistry , composite material , thermal stability , hydrogen bond , solvent , molecule , organic chemistry , chemistry , engineering
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