- Sedimentation potential
Sedimentation potential occurs due to
dispersed particles motion relative to the fluid under influence of eithergravity orcentrifugation . This motion disrupts equilibrium symmetry of the particlesdouble layer . Envelopingviscous flow around the particles dragsions of thediffuse layer away from the particles. This causes slight displacement betweensurface charge andelectric charge of thediffuse layer . Particle gainsdipole moment . These dipole moments generate electric field that is called "sedimentation potential". It can be measured for electricopen circuit .There is also notion of sedimentation current. It is
electric current generated by "sedimentation potential" for electricshort circuit There is detailed descriptions of this effect in many books on Colloid and Interface Science [ Lyklema, J. “Fundamentals of Interface and Colloid Science”, vol.2, page.3.208, 1995] , [Hunter, R.J. "Foundations of Colloid Science", Oxford University Press, 1989] , [Dukhin, S.S. & Derjaguin, B.V. "Electrokinetic Phenomena", J.Willey and Sons, 1974] , [Russel, W.B., Saville, D.A. and Schowalter, W.R. “Colloidal Dispersions”, Cambridge University Press,1989] , [Kruyt, H.R. “Colloid Science”, Elsevier: Volume 1, Irreversible systems, (1952)] , [Dukhin, A.S. and Goetz, P.J. "Ultrasound for characterizing colloids", Elsevier, 2002] .
References
External links
* [http://www.dispersion.com/ Dispersion Technology]
Category
Interface and Colloid Science
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