Abstract
AbstractThis work reports on the rheological properties of alumina dispersions and how those properties change in the presence of alcohol ethyoxylate, sodium ether sulfate, sodium alcohol sulfate and sodium linear alkylbenzene sulfonate. The following conclusions were reached: alumina dispersions are pseudoplastic, that is, the viscosity decreases with increasing shear rate, and they are also thixotropic, that is, the viscosity decreases with time if the shear rate is held constant. When shearing is stopped, the viscosity gradually recovers. At pH 9, the alumina dispersion studied consisted of suspended aluminum hydroxide flocs. The hindered flow of flocs past one another gave the dispersion a high viscosity. When surfactants were added to the dispersion, the viscosity decreased.
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