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Influence of ionic specificity on the microstructure and the strength of gelled colloidal silica suspensions

Trompette, Jean-Luc and Clifton, Michaël Influence of ionic specificity on the microstructure and the strength of gelled colloidal silica suspensions. (2004) Journal of Colloid and Interface Science, vol. 2 (n° 2). pp. 475-482. ISSN 0021-9797

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Official URL: http://dx.doi.org/10.1016/j.jcis.2004.03.040

Abstract

The dynamic rheological behavior of gelled Ludox suspensions in the presence of the structure-breaker ammonium counterion and the structure-maker sodium counterion has been investigated. Depending on the nature of the electrolyte and its concentration, the results highlight the crucial effect of the network microstructure on the rheological results. Within the same microstructure, the strength of gelled networks has been found to be greater in the presence of the poorly hydrated ammonium counterions at any Ludox volume fraction. The obtained results were discussed with respect to recent contradictory trends reported in the literature concerning the behavior of silica suspensions.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Journal of Colloid and Interface Science website : http://www.sciencedirect.com/science/journal/00219797
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
Laboratoire de Génie Chimique - LGC (Toulouse, France) - Génie des Interfaces & Milieux Divisés (GIMD)
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Deposited By:Hélène Dubernard

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