Rheology of Thixotropic Suspensions of Magnesium Montmorillonite

Leonard, J. T.; Hazlett, Robert N.

doi:10.1021/i160018a013

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1970

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“…The study of the gelling and subsequent flocculation of aqueous clay dispersions is usually based on indirect observation in the form of rheological measurements [1]. It is obvious that it would be desirable to have a method for the direct observation of flocculation, but this has proved very difficult in the case of natural clays, unless they are examined at very low concentration [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

The Study of Gel Formation and Flocculation in Aqueous Clay Dispersions by Optical and Rheological Methods

Neumann¹,

Sansom²

1970

Israel Journal of Chemistry

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Optical and rheological methods have been used to study the gelling and flocculation of aqueous dispersions of a synthetic hectorite-Jike clay, Laponite CP, on the addition of electrolytes or water miscible organic solvents. There is a positive correlation between the yield value and turbidity when the dispersions are flocculated with electrolyte, Addition of polar solvent, however, shows no such correlation, only a sudden change from very clear to very cloudy dispersion. while the yield value increases gradually until gross flocculation takes place. It is suggested that two different flocculation mechanisms lire being observed.

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Section: Introductionmentioning

confidence: 99%