Colloid stability and the influence of dissolved gas

dc.contributor.author	Snoswell, D.R.E.
dc.contributor.author	Duan, J.
dc.contributor.author	Fornasiero, D.
dc.contributor.author	Ralston, J.
dc.date.issued	2003
dc.description.abstract	The colloidal stability of synthetic silica spheres with clean, methylated, and dehydroxylated surfaces was studied at different concentrations of dissolved gas and KCl electrolyte at a fixed pH of 4.2. A classic stability ratio/electrolyte concentration analysis shows that hydrophobic, methylated particles undergo faster rates of aggregation with increasing concentrations of dissolved carbon dioxide. Similar data for hydrophilic particles and dehydroxylated particles show no change as a function of dissolved carbon dioxide concentration. Zeta-potential data behave similarly, showing a strong influence of dissolved gas only for methylated particles. The results are interpreted in terms of DLVO theory, with the surface-to-surface interaction dominated by the presence of very small, protruding bubbles.
dc.identifier.citation	Journal of Physical Chemistry B, 2003; 107(13):2986-2994
dc.identifier.doi	10.1021/jp021751l
dc.identifier.issn	1089-5647
dc.identifier.issn	1520-5207
dc.identifier.uri	https://hdl.handle.net/1959.8/41987
dc.language.iso	en
dc.publisher	American Chemical Society
dc.rights	Copyright status unknown
dc.source.uri	https://doi.org/10.1021/jp021751l
dc.title	Colloid stability and the influence of dissolved gas
dc.type	Journal article
pubs.publication-status	Published
ror.mmsid	9915913343901831

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