Stress Jumps of Charged Colloidal Suspensions, Measurement of the Elastic-like and Viscous-like Stress Components

Mackay M.E. and Kaffashi B. (1995) Stress Jumps of Charged Colloidal Suspensions, Measurement of the Elastic-like and Viscous-like Stress Components. Journal of Colloid And Interface Science, 174 1: 117-123. doi:10.1006/jcis.1995.1372


Author Mackay M.E.
Kaffashi B.
Title Stress Jumps of Charged Colloidal Suspensions, Measurement of the Elastic-like and Viscous-like Stress Components
Journal name Journal of Colloid And Interface Science   Check publisher's open access policy
ISSN 0021-9797
Publication date 1995-09-01
Sub-type Article (original research)
DOI 10.1006/jcis.1995.1372
Volume 174
Issue 1
Start page 117
End page 123
Total pages 7
Subject 1505 Marketing
2502 Biomaterials
2504 Electronic, Optical and Magnetic Materials
2508 Surfaces, Coatings and Films
Abstract The shear properties of highly deionized 111.6 ± 2.8 nm diameter polystyrene spheres in water with volume fractions ranging from 0.246 to 0.419 were measured. All suspensions were iridescent at rest, indicating that they had a crystal-like mesostructure. The suspensions studied exhibited viscous-like and elastic-like stress components; the viscous-like component is explicit in shear rate and thus will instantaneously dissipate when shear is stopped, while the elastic-like component will gradually decay upon cessation. The components show changes in slope at a shear rate independent of volume fraction although their absolute magnitudes were dependent on volume fraction. The viscous-like component was dominant at high shear rates and it was concluded that the sliding layer microstructure was responsible for this behavior. At low shear rates the elastic-like component was larger in magnitude. The change in the relative magnitude of the components probably occurred from different microstructures produced during shear.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 14 Jun 2016, 12:20:07 EST by System User