Advertisement

Dewetting of solid surfaces

  • H. Stechemesser
  • G. Zobel
  • H. Partzscht
Interfaces
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 101)

Abstract

The spontaneous movement of the TPC-line across the surface of a spherical particle after rupture of the between particle surface and gas bubble forming thin liquid film has been experimentally studied by means of high-speed video technique at the pendant drop. The time dependence fo the TPC-velocity correlating with the degree of hydrophobicity can be approximated by a simple exponential relationship. The analysis of the experimental data on the basis of the molecular-kinetic theory demonstrates that this theory, also for the spontaneous movement of the TPC-line across the particle surface, leads to physical reasonable conclusions as comparison with the molecular parameters of the forced movement shows.

With the presented measuring method was created the requirements for systematic studies of the dewetting kinetics on a bubble/particle system under influence of interfacial forces.

Key words

Dewetting three-phase contact movement bubble/particle attachment high-speed video technique 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Schulze HJ (1989) In: Laskowski JS (ed) Frothing in Flotation. Gordon and Breach Science Publishers, New York, pp 43–76Google Scholar
  2. 2.
    Dobby GS, Finch JA (1986 J Coll Interf Sci 109:493–498CrossRefGoogle Scholar
  3. 3.
    Ye Y, Miller JD (1989) Int J Min Process 25:199–240CrossRefGoogle Scholar
  4. 4.
    Stechemesser H (1989) Freiberger Forschungshefte A 790:81–100Google Scholar
  5. 5.
    Schulze HJ, Radoev B, Geidel Th, Stechemesser H, Töpfer E (1989) Int J Min Process 27:263–278CrossRefGoogle Scholar
  6. 6.
    Schubert H (1986) Aufbereitung fester mineralischer Rohstoffe, VEB Deutscher Verlag der Grundstoffindustrie, Band II, Leipzig, pp 427Google Scholar
  7. 7.
    Blake TD, Haynes JM (1969) Coll Interf Sci 30:421–423CrossRefGoogle Scholar
  8. 8.
    Voinov OW (1976) Mechanika Zidkosti i Gaza 5:76–84Google Scholar
  9. 9.
    Cox RG (1986) J Fluid Mechan 168:169–194CrossRefGoogle Scholar
  10. 10.
    Petrov PG, Petrov JG (1992) Langmuir 8:1762–1767CrossRefGoogle Scholar
  11. 11.
    Hayes RA, Ralston J (1994) Langmuir 10:340–342CrossRefGoogle Scholar
  12. 12.
    Mingins T, Scheludko A (1979) J Chem Soc, Faraday Transact 1, 75:1–6CrossRefGoogle Scholar
  13. 13.
    Herzberg WJ, Erwin WR (1970) J Coll Interf Sci 33:172–176CrossRefGoogle Scholar
  14. 14.
    Sedev RV, Petrov JG (1992) Colloids & Surfaces 62:141–151CrossRefGoogle Scholar

Copyright information

© Steinkopff Verlag 1996

Authors and Affiliations

  • H. Stechemesser
    • 1
  • G. Zobel
    • 1
  • H. Partzscht
    • 1
  1. 1.Max-Planck-Institut für Kolloid- und GrenzflächenforschungArbeitsgruppe an der TU Bergakademie FreibergFreibergFRG

Personalised recommendations