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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 3, Number 3
March 20, 1982 

Effect of Zeta-Potential on the Viscosity of Clay-Water Suspension
Young Seek Lee, Jongbaik Ree, Taikyue Ree
Viscosity and zeta-potential of 11.0 wt. % aqueous bentonite suspension containing various electrolytes and hydrogen-ion concentration were measured by using a Couette type automatic rotational viscometer and Zeta Meter, respectively. The effects of pH and elcctrolytes on the rheological properties of the suspension were investigated. A system, which has a large zeta-potcntial, has a small intrinsic relaxation time β and a small intrinsic shear modulus 1/α in the Ree-Eyring generalized viscosity equation, i.e., such a system has a small viscosity value, since η = β/α. In general, a stable suspension system has large zeta-potential. The stability condition of clay-water suspension can be estimated by viscometric method since stable suspension generally has small viscosity. The correlation between the stability, viscosity and zeta-potential has been explained by the Ree-Eyring theory of viscous flow.
83 - 88
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