Journal article
Colloidal Stability of Stöber Silica in Acetone–Water Mixtures
Abstract
The colloidal stability and electrokinetic properties of Stöber silica dispersed in acetone–water mixtures containing NaI and CaI2were investigated. The relative permittivity, εr, of the dispersion medium was varied between 21 and 79 by controlling the acetone:water ratio. In the presence of NaI, the coagulation concentrations (cc) increased from 19.6 to 125 mMas εrof the mixtures was raised from 20.7 to 33. However, for εr> 33, the particles …
Authors
Ketelson HA; Pelton R; Brook MA
Journal
Journal of Colloid and Interface Science, Vol. 179, No. 2, pp. 600–607
Publisher
Elsevier
Publication Date
May 1996
DOI
10.1006/jcis.1996.0254
ISSN
0021-9797