Interactions between poly(styrene-allylalcohol) monolayers and surfactants. Correlations to water-in-crude oil emulsion stability

  • H. Ebeltoft
  • K. G. Nordli Børve
  • J. Sjöblom
  • P. Stenius
Conference paper
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 88)


The Π-A isotherms and relaxation behavior of monomolecular films at the air/aqueous solution interface of a copolymer of styrene and allylalcohol (PSAA), mean molecular weight 1500 g/mol) have been investigated as a function of the subphase surfactant concentration. The surfactants were sodium dodecylsulphate (SDS), cetyltrimethylammonium bromide (CTAB) or cetylpyridinium chloride (CPC). At low surfactant concentrations (≲0.3 CMC), the PSAA film is penetrated by surfactant molecules and undergoes a relaxation consistent with conformation changes of the polymer without dissolution into the subphase. At higher concentrations (≈ CMC) the PSAA film is lsowly dissolved into the subphase; Π-A isotherms show a plateau and the films relax by a gradually decreasing surface area. The dissolution of PSAA is probably brought about by adsorption of surfactant molecules onto the polymer chain, giving rise to a water-soluble polymer-surfactant “complex” of poly-electrolyte nature. At medium concentrations, hydrophobic interactions between the neutral polymer and the ionic surfactant increase the hydrophilicity of the film and, thereby, probably lead to the formation of loops of polymer segments into the subphase. All the surfactants seem to interact with the PASS film in similar ways. PASS monolayers are good model systems for emulsion-stabilizing monolayers in North Sea crude oils. The monolayers of both the PSAA and the interfacially active crude oil system respond similarly to the presence of ionic surfactants, indicating anogous dissolution mechanisms. Thus, specific surfactant-monolayer interactions of the type observed will be of importance for an understanding of water-in-crude oil emulsion stability.

Key words

Monolayers air/water interface polymer surfactant interactions crude oil 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Eley DD, Hey MJ, Symonds JD (1988) Colloids Surfaces 32:103CrossRefGoogle Scholar
  2. 2.
    Papirer E, Bourgeois C, Siffert B, Balard H (1982) Fuel 61:732CrossRefGoogle Scholar
  3. 3.
    Dunning HN, Moore JW, Denekas MO (1953) Ind Eng Chem 45:1759CrossRefGoogle Scholar
  4. 4.
    Layrisse I, Rivas H (1984) J Dispersion Sci and Techn 5(1):1CrossRefGoogle Scholar
  5. 5.
    Mingyuan L, Christy AA, Sjöblom J (1991) In Sjöblom J (ed.): Emulsions-A Fundamental and Practical Approach NATO ASI Series, Kluwer p 157Google Scholar
  6. 6.
    Johansen EJ, Skjærvø IM, Lund T, Sjöblom J, Söderlund H, Boström G (1988) Colloids Surfaces 34:353CrossRefGoogle Scholar
  7. 7.
    Sjöblom J, Söderlund H, Lindblad S, Johansen EJ, Skjærvø IM (1990) Colloid Polymer Sci 268:398CrossRefGoogle Scholar
  8. 8.
    Sjöblom J, Mingyuan L, Høiland H, Johansen EJ (1990) Colloids Surfaces 46:127CrossRefGoogle Scholar
  9. 9.
    Sjöblom J, Urdahl O, Høiland H, Christy AA, Johansen EJ (1990) Progr Colloid Polymer Sci 82:131CrossRefGoogle Scholar
  10. 10.
    Nordli KG, Sjöblom J, Kizling J, Stenius P (1991) Colloids Surfaces 57:83CrossRefGoogle Scholar
  11. 11.
    Nordli Børve KG, Sjöblom J, Stenius P, Colloids Surfaces (in press)Google Scholar
  12. 12.
    Aveyard R, Binks BP, Fletcher PDI, Lu J-R (1990) J Colloid Interface Sci 139:128CrossRefGoogle Scholar
  13. 13.
    Robb ID (1981) In: Lucassen-Reynders E (eds.) Anionic Surfactants in Physical Chemistry of Surfactant Action. Marcel Decker, New YorkGoogle Scholar
  14. 14.
    Goddard ED (1986) Colloids Surfaces 19:255 and 301CrossRefGoogle Scholar
  15. 15.
    Saito S (1987) In: Schick MJ (e.) Nonionic Surfactant, Physical Chemistry. Surf Sci Ser vol 23. Marcel Decker, New York, ch 15Google Scholar
  16. 16.
    Thalberg K (1990) Doctoral Thesis, University of Lund, SwedenGoogle Scholar
  17. 17.
    Isemura T, Kimura Y (1955) J Polym Sci 16:90CrossRefGoogle Scholar
  18. 18.
    Isemura T, Imanishi A (1958) J Polym Sci 33:337CrossRefGoogle Scholar
  19. 19.
    Gaines GL Jr (1966) Insoluble Monolayers at Liquid-Gas Interfaces. Wiley (Interscience), New YorkGoogle Scholar
  20. 20.
    Mukherjee P, Mysels KJ (1970) Critical Micellar Concentrations of Aqueous Surfactant Solutions. National Bureau of Standards, Washington DCGoogle Scholar
  21. 21.
    Corrin ML, Harkins WD (1947) J Am Chem Soc 69:683CrossRefGoogle Scholar
  22. 22.
    Tanford C (1980) The Hydrophobic effect: Formation of Micelles and Biological Membranes. John Wiley & Sons, New YorkGoogle Scholar
  23. 23.
    Arai H, Murata M, Shinoda K (1971) J Colloid Interface Sci 37:223CrossRefGoogle Scholar
  24. 24.
    Shirahama K, Ide N (1976) J Colloid Interface Sci 54:450CrossRefGoogle Scholar
  25. 25.
    Saito S (1969) J Polymer Sci 7:1789Google Scholar
  26. 26.
    Giles CH, McIver N (1975) J Colloid Interface Sci 53:155CrossRefGoogle Scholar
  27. 27.
    Adam NK, Askew FA, Pankhurst KGA (1939) Proc Roy Soc A122:485Google Scholar
  28. 28.
    Pankhurst KGA (1942) Proc Roy Soc A179:392Google Scholar
  29. 29.
    Giles CH, McIver N (1974) J Textile Res 44:587CrossRefGoogle Scholar
  30. 30.
    Smith RD, Berg JC (1980) J Colloid Interface Sci 74:273CrossRefGoogle Scholar
  31. 31.
    Honig EP, Hengst JH, den Engelsen DJ (1973) J Colloid Interface Sci 45:92CrossRefGoogle Scholar
  32. 32.
    Cameron A, Giles CH, MacEwan TH (1958) J Chem Soc (London) 1224Google Scholar
  33. 33.
    Ter-Minassian-Saraga L (1956) J Colloid Sci 11:398CrossRefGoogle Scholar
  34. 34.
    Saito S, Taniguchi T, Kitemura K (1971) J Colloid Interface Sci 37:154CrossRefGoogle Scholar
  35. 35.
    Saito S (1967) Kolloid Z 215:16CrossRefGoogle Scholar
  36. 36.
    Fishman ML, Eirich FR (1971) J Phys Chem 75:3135CrossRefGoogle Scholar
  37. 37.
    Gilanyi T, Wolfram E (1981) Colloids Surfaces 3:181CrossRefGoogle Scholar
  38. 38.
    Urdahl O, Sjöblom J (to be published)Google Scholar
  39. 39.
    Kizling J, Nordli Børve KG, Sjöblom J, Stenius P (to be published)Google Scholar
  40. 40.
    Menon VB, Wasan DT (1986) Colloids Surfaces 19:107CrossRefGoogle Scholar

Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1992

Authors and Affiliations

  • H. Ebeltoft
    • 1
  • K. G. Nordli Børve
    • 1
  • J. Sjöblom
    • 1
  • P. Stenius
    • 2
    • 1
  1. 1.Dept. of ChemistryUniversity of BergenBergenNorway
  2. 2.Institute for Surface ChemistryStockholmSweden

Personalised recommendations