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An Experimental Test of Booth's Primary Electroviscous Effect Theory

✍ Scribed by F.J Rubio-Hernández; A.I Gómez-Merino; E Ruiz-Reina; P Garcı́a-Sánchez

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
117 KB
Volume
255
Category
Article
ISSN
0021-9797

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✦ Synopsis

The primary electroviscous effect has been investigated in dilute suspensions of titanium oxide (anatase), the viscosities of which were measured by means of a capillary viscometer with automatic timing. The linear relation between viscosity and solids volume fraction was first determined at the isoelectric point of the particles when the particles are uncharged, and the electroviscous contribution to the intrinsic viscosity was then determined at other values of pH. Booth's theory (Proc. R. Soc. London Ser. A203, 533 (1950)) agrees well with the experimental results when the particle zeta potential is small and the double layer is thin (kappa alpha approximately 7.3), but agreement is poor when the double layer is thick (kappa alpha approximately 0.6).

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