Adsorption on colloids and flocculation: The influence of salt
- 1 April 1991
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 94 (7), 5222-5225
- https://doi.org/10.1063/1.460526
Abstract
The stability of colloidal silica particles in a mixture of water and 2,6-lutidine is investigated in the presence of salt. Close to the demixing temperature of the solvent, a reversible flocculation occurs, coupled with lutidine adsorption on the colloid surface. Addition of Mg(NO3)2 is shown to suppress the lutidine adsorption and to reverse it into water adsorption. The flocculation disappears at the same time. This behavior is interpreted as a modification of the properties of the colloid surface by the salt and is in accord with current wetting theory.Keywords
This publication has 18 references indexed in Scilit:
- Wetting phenomena and colloidal aggregation in binary mixturesPhysical Review A, 1990
- Stability of colloids and wetting phenomenaPhysical Review A, 1989
- Wetting on cylinders and spheresPhysical Review B, 1987
- Continued exploration of the wetting phase diagramPhysical Review B, 1987
- Control of a wetting transition by substrate surface chemistry: The interplay of long- and short-range forcesPhysical Review B, 1987
- Wetting transitions in systems with van der Waals forcesPhysical Review B, 1985
- Adsorption Phenomena at the Surface of Silica Spheres in a Binary Liquid MixturePhysical Review Letters, 1985
- Theory of dynamic light scattering from polydisperse systemsThe Journal of Chemical Physics, 1976
- Tracer Diffusion and Shear Viscosity for the System 2,6-Lutidine-Water near the Lower Critical PointThe Journal of Chemical Physics, 1972
- Coexistence curve of the 2,6-lutidine + water system in the critical regionTransactions of the Faraday Society, 1963