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Morphology and Internal Structure of Soot and Carbon Blacks

  • J. Lahaye
  • G. Prado

Abstract

From the viewpoint of morphology and internal structure soot collected in exhaust gases of engines and carbon blacks are identical materials. They are made of aggregates of pseudospherical particles; the size of individual particles goes from ca. 10 to 500 nm; a single aggregate can include several tens of particles.

The morphology (size and shape) of aggregates can be characterized by electron microscopy, scattering and absorption of light, ultracentrifugation and also adsorption of gases and liquids (pure liquids and solutions).

Electron microscopy has been used to give a two dimensional description of aggregates; the development of Quantimets permitted a quantitative description of soot. The third dimension of carbon black aggregates can be investigated by using electron microscopy combined with stereoscopic methods (observation under two different angles).

Scattering and absorption of light allow one to compute equivalent diameters of aggregated particles.

Ultracentrifugation, carried out on suspensions in water, gives equivalent Stokes diameter distributions of carbon blacks.

A convenient technique has become standard; it is based on the absorption of oil or dibutyl-phthalate in the voids between the particles constituting the aggregates.

Specific surface areas and porosity of soot are currently determined by gas adsorption (essentially nitrogen at the temperature of liquid nitrogen). Iodine adsorption from iodine solution in water has also become standard practice.

The internal structure of carbon blacks (i.e. the crystalline organization of carbon inside the material) has been systematically studied by X-ray diffraction, electron microscopy of oxidized particles, dark field and phase contrast electron microscopy.

The crystalline structure is essentially graphitic (turbostratic). Layer planes of carbon are the basic building blocks of carbon black; they are partially oriented parallel to the surface but also around centers inside the particles.

External layer planes are continuous from one particle to its neighbors. Therefore, in the final material, individual particles have no real existence; the aggregate is the constituent unit of soot.

Keywords

Carbon Black Dark Field Soot Particle Layer Plane Carbon Black Particle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    J. B. Donnet and A. Voet, “Carbon Black — Physics, Chemistry and Elastomer Reinforcement”, Marcel Dekker Inc. (1976).Google Scholar
  2. 2.
    J. Lahaye and G. Prado, in “Chemistry and Physics of Carbon”, Edit. by P. L. Walker and P. A. Thrower, Marcel Dekker Inc., Vol. 14 (1978), pp. 168–294.Google Scholar
  3. 3.
    A. I. Medalia and D. Rivin, in “Characterization of Powder Surfaces”, Edit. by G. D. Parfitt and K. S. W. Sing, Academic Press (1976) pp. 279–351.Google Scholar
  4. 4.
    L. H. Cohan and J. H. L. Watson, Rubber Age, Vol. 68 (1951), p. 687.Google Scholar
  5. 5.
    A. I. Medalia and F. A. Heckman, Carbon, Vol. 7 (1969), p. 562.CrossRefGoogle Scholar
  6. 6.
    C. Fisher and M. Cole, The Microscope, Vol. 16 (2), (1968), p. 81.Google Scholar
  7. 7.
    C. Fisher, The Microscope, Vol. 19 (1), (1971), p. 1.Google Scholar
  8. 8.
    W. M. Hess, L. L. Ban and G. C. Mc Donald, Rubber Chem. Technol., Vol. 42 (1969), p. 1209.CrossRefGoogle Scholar
  9. 9.
    W. M. Hess, G. C. Mc Donald and E. Urban, Rubber Chem. and Technol., Vol. 46 (1), (1973), p. 204.CrossRefGoogle Scholar
  10. 10.
    E. Redman, F. A. Heckman and J. E. Connolly, “Particle size analysis conference Proceedings”, 3d, (1978), p. 51.Google Scholar
  11. 11.
    M. Rink, J. Microsc. Oxford, Vol. 107 (1976), p. 267.CrossRefGoogle Scholar
  12. 12.
    H. N. Mercer, A. H. Boyer, P. L. Brusky and M. L. Deviney, Rubber Chem. and Technol., Vol. 49 (4), (1976), p. 1068.CrossRefGoogle Scholar
  13. 13.
    H. N. Mercer, A. H. Boyer and M. L. Deviney, Rubber Chem. and Technol. Vol. 52 (2), (1979), p. 377.CrossRefGoogle Scholar
  14. 14.
    E. Redman, F. A. Heckman and J. E. Connoly, Meeting of the Rubber Division, American Chemical Society, Chicago, Ill. 1977; Abstract in Rubber Chem. Technol., Vol. 50 (1977), p. 1000.Google Scholar
  15. 15.
    J. B. Donnet, C. Eckhardt and A. Voet, Rev. Gen. Gaontchouc Plast. Vol. 44 (5), (1967), p. 627, Vol. 44 (12), (1967), p. 1505.Google Scholar
  16. 16.
    S. Premilat and P. Horn, J. Chim. Phys., Vol. 63 (3), (1966), p. 463.Google Scholar
  17. 17.
    J. C. Ravey and S. Premilat, J. Chim. Phys., Vol. 67 (1), (1970), p. 147.Google Scholar
  18. 18.
    J. C. Ravey and S. Premilat, J. Chim. Phys., Vol. 67 (I), (1970), p. 157.Google Scholar
  19. 19.
    F. A. Heckman, E. Redman and J. E. Conolly, Complementary Studies of Carbon Black Aggregate Morphology by Analytical Centrifugation and Quantitative Image Analysis -Technical Service Report Cabot Corporation, Spring (1977).Google Scholar
  20. 20.
    ASTM D 2414–65, Standard Method of Testing, Carbon Black — Dibutyl Phthalate Absorption Number, American Society for Testing and Materials, Philadelphia, Pa., (1966).Google Scholar
  21. 21.
    B. Schubert, F. P. Ford and F. Lyon, Analysis of Carbon Black, Encyclopedia of Industrial Chemical Analysis John Wiley and Sons, Inc., Vol. 8 (1969), p. 225.Google Scholar
  22. 22.
    A. I. Medalia, J. Colloid Interf. Sci., Vol. 32 (1970), p. 115.CrossRefGoogle Scholar
  23. 23.
    M. Bastick, P. Chiche and J. Rappeneau, Les Carbones — Tome II (Masson et Cie), (1965), pp. 24–160.Google Scholar
  24. 24.
    W. R. Smith, Rev. Gen. Caoutchouc, Vol. 41 (1964), p. 367.Google Scholar
  25. 25.
    N. N. Avgul and A. V. Kiselev, “Chemistry and Physics of Carbon”, P. L. Walker Jr., Marcel Dekker, New York, Vol. 6 (1970).Google Scholar
  26. 26.
    W. H. Wade, M. L. Deviney, W. A. Brown, M. H. Knoosch, and D. R. Wallace, Rubber Chem. Technol., Vol. 45 (1972), p. 117.CrossRefGoogle Scholar
  27. 27.
    ASTM D 1510–65, Method of Tests for Iodine Adsorption Number of Carbon Black, American Society for Testing and Materials, Philadelphia, Pa, (1966).Google Scholar
  28. 28.
    F. Z. Saleeb and V. A. Kitchener, J. Chem. Soc. (1965), p. 911.Google Scholar
  29. 29.
    V. C. Abram and M. C. Bennett, J. Colloid Interf. Sci., Vol. 27 (1968), p. 1.CrossRefGoogle Scholar
  30. 30.
    G. Prado, PhD Dissertation Thesis, Strasbourg University, (1972).Google Scholar
  31. 31.
    G. Prado, and J. Lahaye, J. Chim, Phys., Vol. 4 (1975), p. 483.Google Scholar
  32. 32.
    B. E. Waren, J. Chim. Phys. Vol. 2 (1934), p. 551.CrossRefGoogle Scholar
  33. 33.
    J. Mering et J. Maire, Les Carbones, Tome I (Masson & Cie), (1965), p. 162.Google Scholar
  34. 34.
    A. E. Austin, Proceeding 3rd Conf. on Carbon, (1958), p. 389.Google Scholar
  35. 35.
    S. Ergun, Carbon, Vol. 6 (1968), p. 141.CrossRefGoogle Scholar
  36. 36.
    E. A. Kmetko, Proc. 1st and 2nd Conf. on Carbon, (1956), p. 21Google Scholar
  37. 37.
    H. P. Boehm, Z. Anorg. Allgem. Chem., Vol. 297 (1958), p. 315.CrossRefGoogle Scholar
  38. 38.
    H. Akamatu and H. Kuroda, Proc. 4th Conf. on Carbon, (1960), p. 363.Google Scholar
  39. 39.
    V. L. Kasatotshkin, V. M. Lukianovitch, N. M. Popov and K. V. Tschmutov, J. Chim. Phys., Vol. 52 (1964), p. 822.Google Scholar
  40. 40.
    F. A. Heckman and D. E. Harling, Rubber Chem. Technol. Vol. 39 (1966).Google Scholar
  41. 41.
    J. B. Donnet and J. C. Borland, Rev. Gen. Caoutchouc, Vol. 41 (1964), p. 407.Google Scholar
  42. 42.
    A. Oberlin, Carbon, Vol. 17 (1979), p. 7.CrossRefGoogle Scholar
  43. 43.
    R. D. Heidenreich, W. M. Hess and L. L. Ban, J. Appl. Cryst., Vol. 1 (1968), p. 1.CrossRefGoogle Scholar
  44. 44.
    W. M. Hess, L. L. Ban, F. J. Eckert and V. Chirico, Rubber Chem. Technol., Vol. 41 (1968), p. 356.CrossRefGoogle Scholar
  45. 45.
    P.A. Marsh, A. Voet, T. J. Mullens and L. D. Price, Carbon, Vol. 9 (1971), p. 797.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1981

Authors and Affiliations

  • J. Lahaye
    • 1
  • G. Prado
    • 2
  1. 1.Centre de Recherches sur la Physico-Chimie des Surfaces SolidesC.N.R.S.MulhouseFrance
  2. 2.Massachusetts Institute of TechnologyCambridgeUSA

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