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Modification of Na-Alginate Films by $CaCl_2$ Treatment  

Rhim, Jong-Whan (Department of Food Engineering, Mokpo National University)
Kim, Ji-Hye (Department of Food Engineering, Mokpo National University)
Kim, Dong-Han (Department of Food and Nutrition, Mokpo National University)
Publication Information
Korean Journal of Food Science and Technology / v.35, no.2, 2003 , pp. 217-221 More about this Journal
Abstract
Effect of direct addition of $CaCl_2$ into sodium alginate film-making solution and immersion of alginate films into $CaCl_2$ solutions on tensile strength (TS), percentage elongation at break (E), water vapor permeability (WVP), and water solubility (WS) of the films were investigated. TS of alginate films prepared by both methods increased. E of $CaCl_2-added$ films did not change significantly (P>0.05), whereas that of $CaCl_2-immersion$ films decreased significantly (p<0.05). WVP of films prepared by both methods decreased significantly, but the effect was more significant in the $CaCl_2-immersion$ films. Water resistance was not changed in the $CaCl_2-added$ films, whreras increased significantly in $CaCl_2-immersion$ films (p<0.05). Properties of alginate films depend on the concentration of $CaCl_2$ treatments in both methods, and they also depend on treatment time in the immersion method.
Keywords
Na-alginate film; property modification; $CaCl_2$ treatment; insolubilization;
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