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The surface charge properties of colloidal titanium dioxide dispersions in ethylene glycol and water have been studied. The effect that silica and alumina coatings have on anatase particles is discussed, along with the difference in behaviour between anatase and rutile. Surface charge properties determined by electrophoresis show significant differences between each type of particle and between the two dispersion media. Small amounts of water have a significant effect on the behaviour of the particles, including the ability to change the sign of the charge for uncoated samples. (C) 2002 Published by Elsevier Science B.V.
Author(s): Chadwick MD, Goodwin JW, Lawson EJ, Mills PDA, Vincent B
Publication type: Article
Publication status: Published
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects
ISSN (print): 0927-7757
ISSN (electronic): 1873-4359
Publisher: Elsevier BV
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