The study of aggregate stability of monodisperse silica sol in NaCl solutions
Abstract
By flow ultramicroscopy method the kinetics of aggregation of monodisperse silica sol (with a size 250 nanometers) in aqueous solutions NaCl at pH 6.2, 9.0 and 10.2 has been investigated. It was established that slow coagulation of sol SiO2 proceeds on barrierless mechanism in the distant potential minimum resulting from predominance of structural forces of repulsion on dispersion forces of an attraction.
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