Electroviscous effects

Electroviscous effects, in chemistry of colloids and surface chemistry, according to an IUPAC definition,[1] are the effects of the particle surface charge on viscosity of a fluid.

Viscoelectric is an effect by which an electric field near a charged interface influences the structure of the surrounding fluid and affects the viscosity of the fluid.[2]

Kinematic viscosity of a fluid, η, can be expressed as a function of electric potential gradient, E, by an equation in the form:

η=η0(1+f E2),

where f is the viscoelectric coefficient of the fluid.

The value of f for water (ambient temperature) has been estimated to be (0.5–1.0) × 10−15 V−2 m2.[3]

See also

References

  1. ↑ IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook. Entry: electroviscous effects.
  2. ↑ Vincent A. Hackley, Chiara F. Ferraris, "The Use of Nomenclature in Dispersion Science and Technology", NIST Recommended Practice Guide, NIST, Special Publication 960-3, 2001.
  3. ↑ Robert J. Hunter and J. V. Leyendekkers, "Viscoelectric coefficient for water", J. Chem. Soc., Faraday Trans. 1, 1978, 74, 450-455.
This article is issued from Wikipedia - version of the 9/26/2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.