Surface forces in wetting, flotation and capillary phenomena

  • N. V. Churaev
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 101)


Surface forces play a crucial role in disperse systems, containing colloidal particles or thin films. Theory of wetting, based on the Frumkin-Derjaguin approach, relates the contact angles with isotherms of disjoining pressure Π(h) of wetting films. On the basis of the isotherms obtained, contact angles were calculated and compared with experimental data. It was shown that in the region of contact angles from 10 to 50 degrees it is sufficient in some cases to take into account the molecular and electrostatic forces only. Complete wetting is guaranteed by the action of hydrophilic repulsion forces, whereas large contact angles arise under the action of hydrophobic attraction forces. The effects of surfactants on contact angles’ formation, wetting films’ stability and flotation are discussed. Capillary phenomena, influencing kinetics of penetration and mutual displacement of fluids were investigated using model systems. The kinetics is crucially influenced by addition of surfactants. Capillary pressure of a moving meniscus changes as a result of a mass exchange of surfactant molecules between the meniscus, solid wall and forming film interfaces. The arising effects were investigated in dependence on flow rates, electrolyte and surfactant concentration.

Key words

Surface forces contact angles wetting films capillary penetration of surfactant solutions 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Derjaguin BV, Churaev NV (1985) Surface Forces, Nauka, Moscow; (1987) Cons. Bureau — Plenum, New YorkGoogle Scholar
  2. 2.
    Israelachvili J (1985) Intermolecular and Surface Forces, Acad. Press, New YorkGoogle Scholar
  3. 3.
    Derjaguin BV, Churaev NV (1987) Langmuir 3:607–612CrossRefGoogle Scholar
  4. 4.
    Churaev NV (1988) Rev Phys Appl 23:975–987Google Scholar
  5. 5.
    Churaev NV (1995) J Colloid Interface Sci 172:479–484CrossRefGoogle Scholar
  6. 6.
    Israelachvili JN, Pashley RM (1982) Nature 300:341–342CrossRefGoogle Scholar
  7. 7.
    Pashley RM, McGuiggan PM, Ninham BV, Evans DF (1985) Science 229:1088–1089CrossRefGoogle Scholar
  8. 8.
    Claesson PM, Blom CE, Herder PC, Ninham BV (1986 J Colloid Interface Sci 114:234–242CrossRefGoogle Scholar
  9. 9.
    Claesson PM, Christenson HK (1988) J Phys Chem 92:1650–1655CrossRefGoogle Scholar
  10. 10.
    Rabinovich YaI, Derjaguin BV (1988) colloids Surf 30:243–249Google Scholar
  11. 11.
    Frumkin AN (1938) Zh. Fiz Khim 12:337–345Google Scholar
  12. 12.
    Derjaguin BV (1940) Zh Fiz Khim 14:137–147Google Scholar
  13. 13.
    Churaev NV (1993) Colloids Surf 79:25–31CrossRefGoogle Scholar
  14. 14.
    Sergeeva IP, Sobolev VD, Churaev NV, Derjaguin BV (1981) J Colloid Interface Sci 84:451–460CrossRefGoogle Scholar
  15. 15.
    Churaev NV, Sergeeva IP, Sobolev VD, Zorin ZM, Gasanov EK (1993) Colloids Surf 76:23–32CrossRefGoogle Scholar
  16. 16.
    Churaev NV (1994) Kolloid Zh 56:707–723Google Scholar
  17. 17.
    Aronson MP, Princen HM (1978) Colloid Polym Sci 256:140–149CrossRefGoogle Scholar
  18. 18.
    Churaev NV, Ershov AP, Esipova NE, Iskandarjan GA, Madjarova EA, Sergeeva IP, Sobolev VD, Svitova TF, Zakharova MA, Zorin ZM, Poirier JE (1994) Colloids Surf 91:97–112CrossRefGoogle Scholar
  19. 19.
    Ershov AP, Zorin ZM, Svitova TF, Churaev NV (1993) Kolloid Zh 55(3):39–47; 55(4):45–53Google Scholar
  20. 20.
    Ershov AP, Zorin ZM, Churaev NV (1995) Kolloid Zh 57:329–334Google Scholar
  21. 21.
    Churaev NV, Ershov AP, Zorin ZM (1996) J Colloid Interface Sci 177:589–601CrossRefGoogle Scholar
  22. 22.
    Zorin ZM, Churaev NV (1992) Adv Colloid Interface Sci 40:85–108CrossRefGoogle Scholar
  23. 23.
    Washburn EW (1921) Phys Rev 17:273–283CrossRefGoogle Scholar

Copyright information

© Steinkopff Verlag 1996

Authors and Affiliations

  • N. V. Churaev
    • 1
  1. 1.Laboratory of Thin Liquid LayesInstitute of Physical Chemistry of Russian Academy of SciencesMoscowRussia

Personalised recommendations