Relationship between structure and properties of modified potato starch biodegradable films

Potato starch was gelatinized in the presence of water and varying amounts of glycerol at 90°C. Starch/glycerol films were prepared by casting with water. The addition of glycerol produces a decrease in the crystallinity of the starch in the films. Starch was acetylated (with acetic acid and anhydri...

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Bibliographic Details
Published in:Journal of applied polymer science 2006-09, Vol.101 (6), p.4313-4319
Main Authors: Cyras, Viviana P., Tolosa Zenklusen, María C., Vazquez, Analía
Format: Article
Language:English
Subjects:
Applied sciences
crystallization
esterification
Exact sciences and technology
film biodegradable
glycerol
Natural polymers
Physicochemistry of polymers
Solanum tuberosum
starch
Starch and polysaccharides
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Summary:Potato starch was gelatinized in the presence of water and varying amounts of glycerol at 90°C. Starch/glycerol films were prepared by casting with water. The addition of glycerol produces a decrease in the crystallinity of the starch in the films. Starch was acetylated (with acetic acid and anhydride) and maleated (with maleic anhydride). Differential scanning calorimetric analysis revealed decrease in the glass transition temperature (Tg) with the chemical modification. The starch modification on the equilibrium moisture content was determined at 25°C. The esterifications produce a decrease in the maximum moisture sorption. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 4313–4319, 2006
ISSN:0021-8995
1097-4628
DOI:10.1002/app.23924