Kislenko V, Oliynyk L, Golachowski A. The model of the rheological behavior of gelatinized starch at low concentrations.
J Colloid Interface Sci 2006;
294:79-86. [PMID:
16162353 DOI:
10.1016/j.jcis.2005.07.011]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2005] [Revised: 06/16/2005] [Accepted: 07/03/2005] [Indexed: 11/18/2022]
Abstract
The optical density at the wavelength from 300 to 800 nm and the rheological behavior of gelatinized starch at its concentration from 3 to 30 g/L and the medium pH from 2 to 11 were investigated. The volume concentration of the swelling associates of macromolecules or their globules increases when pH of gelatinized starch rises. An influence of the volume concentration of gelatinized starch on the dependence of the shear stress on shear rate was studied. The dynamic viscosity is proportional to the volume concentration at the gelatinized starch concentration lower than 25% and proportional to the logarithm of the volume concentration at the starch concentration greater than 25%. Proposed mathematical model takes into account an influence of the volume concentration of swelling starch globules and the concentration of glucoside links of macromolecules between the globules of macromolecules or their associates on the dynamic viscosity of gelatinized starch. This model allows to describe the experimental data obtained.
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