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1 International Journal of Applied Mechanics and Engineering

1 2001

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Rheological properties of gelatin gels with sodium alginate

Derkatch S. R., Voronko N. G., Izmailova V. N.

International Journal of Applied Mechanics and Engineering

2001

Vol. 6, no 3

659-673

The effect of anionic polysaccharide sodium alginate on the rheological properties of gelatin gels at pH values more than isolectric point of gelatin macromolecules has been investigated. The results of rheological measurements within the non-linear viscoelasticity range have been studied using Hershel-Bulkley model and Casson model. The analysis of the rheological curves allows characterizing the gelatin gels of low concentration of sodium alginate as viscoelastic-plastic material. Sodium alginate additions give non-monotonous change of the rheological parameters with clearly expressed extreme points for the multicomponent gels in comparison with the gelatin gels. In the presence of polysaccharide the rate of three-dimensional structure formation increases. A range of sodium alginate/gelatin ratios with extreme values of the rheological characteristics has been discovered.