Surface and rheological properties of oxide dispersions under the influence of adsorbed metal ions hydrolysis products
Leong, Yee-Kwong (2005) Surface and rheological properties of oxide dispersions under the influence of adsorbed metal ions hydrolysis products. In: Proceedings of the 5th International Symposium on Multiphase Flow, Heat Mass Transfer and Energy Conversion, pp. 1-5. From: 5th International Symposium on Multiphase Flow, Heat Mass Transfer and Energy Conversion, 3 - 6 July 2005, Xi'an, China.
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The effects of hydrolyzable Cu^2+, C0^2+, Ne^+ and Zr^4+ ions on the zeta potential and yield stress behaviour of silica and zirconia dispersions were evaluated as a function of pH. Silica dispersion remained dispersed at its point of zero charge of pH -1.0. Adsorption of metal ions hydrolysis products caused the silica dispersion to flocculate. Flocculation corresponded to the pH of fonnation of hydrolysis products. The interparticle forces arising from adsorbed hydrolysis product was measured using a rheological vane yield stress technique. The attractive forces contributing to the yield stress are van der Waals, charged patch and bridging.
|Item Type:||Conference Item (Refereed Research Paper - E1)|
|Keywords:||metal ions hydrolysis products; oxide dispersions; surface activity|
|Date Deposited:||15 Feb 2010 01:20|
|FoR Codes:||09 ENGINEERING > 0904 Chemical Engineering > 090499 Chemical Engineering not elsewhere classified @ 60%
03 CHEMICAL SCIENCES > 0306 Physical Chemistry (incl Structural) > 030603 Colloid and Surface Chemistry @ 40%
|SEO Codes:||86 MANUFACTURING > 8606 Industrial Chemicals and Related Products > 860699 Industrial Chemicals and Related Products not elsewhere classified @ 100%|