Advertisement

Image analysis of fractal aggregates of precipitated silica

  • A. Tuel
  • P. Dautry
  • H. Hommel
  • A. P. Legrand
  • J. C. Morawski
Colloids
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 76)

Abstract

Amorphous silica usually appears as a set of more or less spherical particles of a few hundred angstroms in diameter, building up extended aggregates. To understand how the shape of the aggregates observed by electron microscopy is related to the synthesis process, we have simulated by DLA and CCA models the way in which the elementary particles connect to each other. We study in particular how two-dimensional images inform us of the actual three-dimensional structure of the fractal aggregates. Results demonstrate the possibility of describing the morphology of precipitated silica using these models. A better understanding and a better control of the aggregation step seems possible by using these methods.

Key words

Precipitated silica image analysis aggregates fractal dimension numerical models 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Bomo F, Morawski JC, Lamy P, Le Thiesse JC (1985) Quantitative determination of the morphology of precipitated silicas: relationship between morphology, specific surface area and mechanical properties of filled elastomers. ACS Rubber Division, Cleveland USAGoogle Scholar
  2. 2.
    Botet R, Julien R (1984) J Phys A, Math Gen 17:2517CrossRefGoogle Scholar
  3. 3.
    Chevalier Y, Morawski JC (1986) Precipitated Silica: preparation, characterization European Chemistry: Silica. Le Bischenberg-Obernai, September 22–24, FranceGoogle Scholar
  4. 4.
    Kolb M, Botet R, Julien R (1983) Phys Rev Lett 51:1123CrossRefGoogle Scholar
  5. 5.
    Mandelbrot B (1975) Les objects fractals, Flammarion, ParisGoogle Scholar
  6. 6.
    Meakin P (1983) Phys Rev Lett 51:1114Google Scholar
  7. 7.
    Morawski JC (1982) An exciting future for silica I: Surface area and tear strength. Int Rubber Conf, Paris, FranceGoogle Scholar
  8. 8.
    Tence M, Chevalier JP, Julien R (1986) J Phys 47:1989Google Scholar
  9. 9.
    Witten TA, Sander LM (1981) Phys Rev Lett 47:1400CrossRefGoogle Scholar

Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1988

Authors and Affiliations

  • A. Tuel
    • 2
  • P. Dautry
    • 2
  • H. Hommel
    • 2
  • A. P. Legrand
    • 2
  • J. C. Morawski
    • 1
    • 2
  1. 1.Rhône-Poulenc Films St. Maurice de BeynostMiribelFrance
  2. 2.Laboratoire de Physique Quantique UA CNRS 421 ESPCICedex 05France

Personalised recommendations