Electrochemical Control of the Flow Behaviour of Coagulated Colloidal Sols

  • Robert J. Hunter
  • Bruce A. Firth


The flow properties of colloidal suspensions are of paramount importance in many of their technological applications and the control of those flow properties has been known for a long time to depend upon control of the interaction forces between the particles. Addition of strongly adsorbed ions (like H+, OH- and ionic surfactants) has often been used in an empirical way to alter dispersity and “viscosity” but only now are we beginning to obtain a more definite idea of how these ions work. In what follows we will concentrate attention for the most part on the behaviour of monodisperse suspensions of rigid spherical particles involved in attractive interactions with only brief preliminary reference to other types of interaction. The ions involved are in electrochemical equilibrium with the bulk suspension medium and on adsorption they modify the particle charge and hence the energy of interaction between particles. It is the quantitative connection between the solution electrochemistry and the ultimate flow behaviour, that we will explore in this paper.


Shear Rate Flow Behaviour High Shear Rate Critical Shear Stress Suspension Medium 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Krieger, I.M., Adv.Colloid Interface Sci., 3, 111–136 (1972).CrossRefGoogle Scholar
  2. 2.
    Booth, F., Proc.Royal Soc. (London) 203A, 533–551 (1950).Google Scholar
  3. 3.
    Chan, F.S., Blachford, J. and Goring, D.A.I., J.Colloid Interface Sci., 22, 378–385 (1966).CrossRefGoogle Scholar
  4. 4.
    Stone-Masui, J. and Watillon, A., J.Colloid Interface Sci., 28, 187–202 (1968): 34, 327-9 (1970).CrossRefGoogle Scholar
  5. 5.
    Firth, B.A., Ph.D. Thesis, University of Sydney, 1975.Google Scholar
  6. 6.
    Verwey, E.J.W. and Overbeek, J. Th.G., Theory of Stabibility of Lyophobic Colloids, Elsevier, Amsterdam, 1948.Google Scholar
  7. 7.
    Smoluchowski, M. von, Physik.-Z, 17, 557, 583 (1916).Google Scholar
  8. 8.
    Bagster, D.F. and Tomi, D., Chem.Eng.Sci., 29, 1773 (1974).Google Scholar
  9. 9.
    Michaels, A.S. and Bolger, J.C., Ind.Eng.Chem.(Fundamentals) 1, 24, 153 (1962).CrossRefGoogle Scholar
  10. 10.
    Hunter, R.J. and Nicol, S.K., J.Colloid Interface Sci., 28, 250 (1968).CrossRefGoogle Scholar
  11. 11.
    Friend, J.P. and Hunter, R.J., J.Colloid Interface Sci., 37, 548 (1971).CrossRefGoogle Scholar
  12. 12.
    Firth, B.A., and Hunter, R.J., Submitted to J.Colloid Interface Sci.Google Scholar
  13. 13.
    Weltmann, R.N. and Green, H., J.Applied Phys., 14, 569 (1943).1943CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1977

Authors and Affiliations

  • Robert J. Hunter
    • 1
  • Bruce A. Firth
    • 1
  1. 1.Department of Physical ChemistryUniversity of SydneyAustralia

Personalised recommendations