Crosslinking Kinetics of Thermally Preset Alginate Gels |
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Authors: | MÓNICA S CHAVEZ JULIO A LUNA RAUL L GARROTE |
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Affiliation: | Author Chavez and Luna are with Institute de Desarrollo Tecnológico para la Industria Química (INTEC) - Consejo Nacional de Investigaciones Cientlficas y Técnicas (CONICET). Univ. Nac. del Litoral. Güemes 3450, C.C. No. 91 (3000), Santa Fe, Argentina.;Author Garrote is with Instituto de Tecnologta de Alimentos (FIQ - UNL), Cuidad Universitaria–C.C. No. 428 (3000), Santa Fe, Argentina. |
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Abstract: | The Sharp-Interface model was used to describe the crosslinking kinetics of thermally preset calcium alginate gel at constant temperature. The model assumes diffusion of calcium ions through a preformed gel of sodium alginate and a selected carrier, and an instantaneous reaction between the calcium and sodium alginate. The proposed model was experimentally verified using two different carriers at the following concentrations: agar 0.6(g/100 mL)-0.8(g/100 mL), and gelatine 4(g/100 mL); sodium alginate concentrations were 1(g/100 mL) and 1.5(g/100 mL), while a 2(g/100 mL) calcium lactate solution was used as calcium ion source. The diffusion coefficient of calcium ion was determined using a cell diffusion model. The model can be used to predict processing effects on food gels. |
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Keywords: | alginate gel crosslinking kinetics calcium |
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