Volume 40, Number 6, December II 1997
|691 - 696
|Cross-disciplinary physics and related areas of science and technology
|01 September 2002
Simple salts effects on the characteristics of the shear thickening exhibited by an aqueous micellar solution of CTAB/NaSal
Laboratoire de Physique des Liquides et des Interfaces,
Groupe Rhéophysique des Colloïdes
Université de Metz, 1 Bd. F. Arago, 57070 Metz, France
Corresponding author: Cressely@lpli.univ-metz.fr
Accepted: 30 October 1997
In this experimental work we investigate the effect of the addition of simple salts such as , NaBr, NaCl, NaF on the rheological behaviour of an aqueous micellar solution of CTAB 0.1 M with NaSal at the concentration of 0.019 M. Experimental results indicate that the rheological characteristics of the solution CTAB/NaSal exhibiting shear thickening (critical shear rate corresponding to the occurrence of the shear-induced structure, amplitude of the phenomenon, slope corresponding to the shear thinning evolution following the maximum viscosity) are progressively, but differently affected by the addition of the inorganic salts. The effect of only a simple screening of electrostatic interactions is shown by the addition of small amounts of NaF.
PACS: 82.70.Dd – Colloids / 83.85.Cg – Rheological measurements / 83.50.Qm – Thixotropy; thickening flows
© EDP Sciences, 1997
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