Influence of Drying Conditions on Physical Properties of Alginate Films |
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Authors: | Mariana Altenhofen da Silva Andréa Cristiane Krause Bierhalz |
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Affiliation: | School of Chemical Engineering, University of Campinas (UNICAMP), Cidade Universitária , “Zeferino Vaz”, Campinas, Brazil |
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Abstract: | The effect of drying conditions of the film-forming solution on thickness, moisture content, water vapor permeability, and tensile properties of alginate films were investigated. A long period of constant rate was observed in all conditions and the model proposed by Wang and Singh was able to adjust the drying data. As expected, there was a clear effect of temperature on drying kinetics; that is, increasing the drying temperature decreased the drying time. Considerable glycerol losses were observed when alginate gel was oven dried at temperatures above 40°C. Compared to other drying conditions, films oven dried at 60°C were thinner, had lower moisture content, and were less flexible. |
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Keywords: | Drying Films Glycerol Alginate |
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