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Design, Preparation and Characterization of Self-Reinforced Starch Films through Chemical Modification

✍ Scribed by Cao Lan; Long Yu; Pei Chen; Ling Chen; Wei Zou; George Simon; Xiaoqing Zhang

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
455 KB
Volume
295
Category
Article
ISSN
1438-7492

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✦ Synopsis

Abstract

A new technique for design and preparation of self‐reinforced starch films is introduced. The films were based on a high‐amylose corn starch that was chemically modified in different ways. Hydroxypropylation was used to decrease gelatinization temperature and improve processability. The reinforcing component consisted of cross‐linked starch granules, where the crosslinking increased granule thermal stability and moisture resistance. Distribution of the cross‐linked starch was imaged by CLSM, and the matrix/particle interface was studied by SEM. Modulus and tensile properties of the starch film were increased by about 30 and 20%, respectively, after addition of rigid cross‐linked starch particles. A perfect interface between matrix and reinforce agent was obtained.
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