Abstract
The study of the rheological properties of aqueous solutions of corn starch (CS) blends with sodium alginate (SA) and agar-agar (AA) as well as the physical and mechanical properties of bicomponent films on their basis has been carried out. The data show that adding of both polymers to starch solution causes an increase in viscosity which is higher in the case of SA. Activation energy for viscosity flow of solutions of CS blended with SA has minimum value at CS:SA ratio = 98:2. The above mentioned dependence is not typical for AA, as flow activation energy in this case raises steadily with the growth of AA content in the solution, like viscosity of the CS:AA. The extreme behavior of polymer blends with low content of one of the polymers is described in terms of mutual solubility or thermodynamic compatibility. There is a tendency that mechanical properties and water solubility increase with the increasing of SA and AA polymers in corn starch matrix. Obtained data evidence the benefits of bicomponent films production instead of starch-based films.
Highlights
IntroductionAmong a number of means to help preserving the health of the environment, one can find photo-, bio- and water
Among a number of means to help preserving the health of the environment, one can find photo, bio- and waterHow to cite this paper: Po, H., Savitskaya, T., Gotina, L., Makarevich, S., Reznikov, I. and Grinshpan, D. (2015) Bicomponent Solutions of Food Polysaccharide and Edible Films on Their Basis
The dependence of viscosity on polymer ratio for bicomponent solutions derived from starch with addition of sodium alginate (SA) and AA in the temperature range from 303 to 343 К is illustrated by Figure 1
Summary
Among a number of means to help preserving the health of the environment, one can find photo-, bio- and water. Sodium alginate is a water soluble salt of alginic acid, a naturally occurring non-toxic polysaccharide found in all species of brown algae [4]. It contains two uronic acids, (1-4)-linked β-D-mannuronic acid (M) and (1 - 4)-linked α-Lguluronic acid (G). The present study was aimed at investigating the rheological properties of aqueous solutions of corn starch (CS) blended with sodium alginate (SA) and agar-agar (AA) in a wide range of concentration as well as the physico-mechanical qualities of bicomponent films on their basis
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