Existence of a Non-Electrostatic Stabilizing Factor in Hydrophobic Selenium Hydrosols


IT is well known that the stability factor of hydrophobic sols decreases, at first, exponentially with the ionic strength of the solution, and reaches, rather suddenly, its limiting value for a certain concentration C 1 of the coagulating electrolyte1. For concentrations lower than C 1 we have the so-called ‘slow coagulation’; the interaction energy consists of long-range electrical repulsions, dependent on ionic strength, and of Van der Waals attractions. For concentrations higher than C 1, the electrical repulsions have practically disappeared2 and we have ‘rapid coagulation’.

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  1. 1

    Reerink, H., and Overbeek, J. T. G., Disc. Farad. Soc., 18, 74 (1954).

  2. 2

    Verwey, E. J. W., and Overbeek, J. T. G., “Theory of the Stability of Lyophobic Colloids” (Elsevier, 1948).

  3. 3

    Von Smoluchowski, M., Phys. Z., 17, 557, 585 (1916); Z. phys. Chem., 92, 129 (1918).

  4. 4

    Hamaker, H. C., Physica, 4, 1058 (1937).

  5. 5

    Kruyt, H. R., and Van Arkel, A. E., Rec. Trav. Chim., 39, 656 (1920); 40, 169 (1921).

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