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Temperature Dependence of the Electrokinetic Properties of Two Disparate Surfaces

✍ Scribed by Dave E. Dunstan

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
199 KB
Volume
166
Category
Article
ISSN
0021-9797

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✦ Synopsis

The electrophoretic mobility of colloidal alkane and silica particles has been measured over the temperature range from 10 to (60^{\circ} \mathrm{C}) in both water and (10^{-3} \mathrm{M} \mathrm{KCl}). Distinctly different temperature dependence is observed for the two types of particles. The nature of the effective charge at the interface is interpreted as deriving from different mechanisms for the two different surfaces. The increasing surface charge density with temperature for the alkane particles is consistent with an entropic mechanism. (1) 1994 Academic Press. Inc.

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