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The shear viscosity of polyampholyte (gelatin) stabilized colloidal dispersions
- Source :
-
Journal of Colloid & Interface Science . Dec2004, Vol. 280 Issue 1, p264-275. 12p. - Publication Year :
- 2004
-
Abstract
- Abstract: A micromechanical model for the zero shear viscosity of polyampholyte-stabilized colloidal dispersions based on the osmotic overlap potential is proposed and tested against model system measurements. This model relates the shear viscosity of polyampholyte-stabilized colloidal dispersions to the oncotic pressure of polyampholyte solutions through an interparticle potential and an effective hard-sphere scaling. The results of viscosity calculations based on independently measured parameters compare favorably to experimental measurements on model, silica dispersions stabilized with adsorbed photographic grade gelatin. The results support a direct link between the capacity of polyampholytes and polyelectrolytes to stabilize dispersions and control dispersion viscosity and their solution oncotic pressure. The model is also demonstrated to provide a master curve for literature data for the zero shear viscosity of polyampholyte stabilized colloidal dispersions. [Copyright &y& Elsevier]
- Subjects :
- *PROPERTIES of matter
*POLYMERS
*HYDRODYNAMICS
*VISCOSITY
Subjects
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 280
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 18947459
- Full Text :
- https://doi.org/10.1016/j.jcis.2004.07.039