Occurrence of shear thickening in aqueous micellar solutions of CTAB with some added organic counterions |
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Authors: | V Hartmann R Cressely |
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Institution: | (1) Laboratoire de Physique des Liquides et des interfaces Groupe Rhéophysique des Colloides Université de Metz – 1Bd F. Arago 57078 Metz Cedex 3 France E-mail: Cressely@lpli.univ-metz.fr, FR |
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Abstract: | In this experimental work we carefully investigate the influence of some organic counterions (having similarities): sodium
salicylate (NaSal), sodium tosylate (NaTos) and sodium benzoate (NaBz) on the rheological properties of two aqueous solutions
(0.1 and 0.05 M) of cetyltrimethylammonium bromide (CTAB). Here we are particularly interested in the occurrence of the shear
thickening effect corresponding to shear induced structures (SIS). All the rheological measurements presented in this work
are realized with the same geometrical device (plan-cone) with controlled imposed shear stress. Conditions of occurrence and
evolutions of the characteristics of the obtained shear thickening are given.
Received: 30 June 1997 Accepted: 20 October 1997 |
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Keywords: | Micellar rheological CTAB salts shear thickening |
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