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KMID : 1007519980070040263
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Food Science and Biotechnology
1998 Volume.7 No. 4 p.263 ~ p.268
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Characteristics of Chitosan Films as Affected by the Type of Solvent Acid
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Rhim, Jong-Whan
Weller, Curtis L./Ham, Kyung-Sik
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Abstract
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Chitosan was dissolved in 8 organic acids and 2 inorganic acids as solvents to prepare the chitosan films. Cellophane-like chitosan films were developed with all the acids used except hydrochloric acid. Mechanical properties and water vapor barrier properties of chitosan films were affected by the type of acid. Tensile strength and elongation at break of chitosan films from 15-42 MPa and 5-58%, respectively. Water vapor permeability of chitosan films ranged from 3.0-8.8 g·㎜/㎡·hr?·kpa, which was comparable to those of other carbohydrate-based edible films. Water solubility also changed depending on the type of acid used. Films made with organic acids such as formic, acetic, malic, and propionic acid were more resistant against solubilization in water than those with citric, lactic, and tartaric acid.
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KEYWORD
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