Gels pp 126-130 | Cite as

An experimental approach to the determination of two-dimensional gel-point: A film balance study

  • Z. Hórvölgyi
  • M. Máté
  • M. Zrínyi
  • J. H. Fendler
Conference paper
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 102)


Two-dimensional gelation has been modelled by the lateral compression of microparticles at water(aqueous solution)-air interfaces in a film balance. The compression induced network formation manifested itself in increased surface pressure (II) at significantly higher surface areas (A) than those observed in hexagonally close-packed particle ordering. The gel-point of a system in these experiments is definec as a surface area (or rather suface coverage) at which the particle-aggregates reach their “solid state”. It can be determined by fitting a tangent to the “solid-state-part” of II-A isotherm and extrapolating it to II=0.

The threshold of gelation was studied from the point of view of particle-particle interactions. The colloid and capillary interactions were influenced by the hydrophobicity of the particles and the composition of liquid phase. Computer simulations of the two-dimensional gelation were also investigated. Both the experimental and numerical results indicate decreasing gel-point (given in surface coverage) with increasing adhesion between the particles. This is in full accord with the well-known particle-particle achesion to the specific volume of sediments (in three dimensions) relationship.

Kew words

Interfacial gelation surface pressure hydrophobicity film balance computer simulation 


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  1. 1.
    Petr Munk (1989) Introduction to Macromolecular Science. John Wiley & Sons, New York, Chichester, Brisbane, Toronto, Singapore, p 107Google Scholar
  2. 2.
    Fendler JH (1994) Membrane-Mimetic Approach to Advanced Materials. Springer-Verlag, BerlinGoogle Scholar
  3. 3.
    Hórvölgyi Z, Németh S, Fendler JH (1993) Colloids Surfaces A: Physicochem Eng Asp 71:327CrossRefGoogle Scholar
  4. 4.
    Hórvölgyi Z, Németh S, Fendler JH (1995) Magy Kém Foly 101(11):488Google Scholar
  5. 5.
    Hórvölgyi Z, Németh S, Fendler JH (1996) Langmuir 12(4):997CrossRefGoogle Scholar
  6. 6.
    Hórvölgyi Z, Kiss E, Pintér J (1986) Magy Kém Foly 92:488Google Scholar
  7. 7.
    Vicsek T (1989) Fractal Growth Phenomena. World Scientific, SingaporeGoogle Scholar
  8. 8.
    Vicsek T, Kertész J (1981) Phys Lett 81A:51Google Scholar
  9. 9.
    Hórvölgyi Z, Medveczky G, Zrínyi M (1991) Colloids Surfaces 60:79–95CrossRefGoogle Scholar
  10. 10.
    Hórvölgyi Z, Máté M, Zrínyi M (1994) Colloids Surfaces A: Physicochem Eng Asp 84:207CrossRefGoogle Scholar
  11. 11.
    Chan FDYC, Henry JD Jr, White LRJ (1981) Colloid Interface Sci 79:410CrossRefGoogle Scholar
  12. 12.
    Kralchevsky PA, Nagayama K (1994) Langmuir 10:23CrossRefGoogle Scholar
  13. 13.
    Everett DH (1988) Basic Principles of Colloid Science. Royal Society of Chemistry, p 144Google Scholar
  14. 14.
    Kolb M.: Private communicationGoogle Scholar

Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1996

Authors and Affiliations

  • Z. Hórvölgyi
    • 1
  • M. Máté
    • 1
  • M. Zrínyi
    • 1
  • J. H. Fendler
    • 2
  1. 1.Department of Physical ChemistryTechnical University of BudapestBudapestHungary
  2. 2.Department of ChemistrySyracuse UniversitySyracuseUSA

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