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Evidence for secondary minimum coagulation in a silica hydrosol obtained by dynamic light scattering

  • Dispersed Systems
  • Conference paper
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Dispersed Systems

Part of the book series: Progress in Colloid & Polymer Science ((PROGCOLLOID,volume 77))

Abstract

The coagulation kinetics of four different samples of a silica hydrosol differing in particle diameters (45, 101, 180, and 515 nm) were examined with the aid of photon correlation spectroscopy. The rate constants for rapid and slow coagulation were determined in the presence of LiCl and CsCl. The data analysis followed a method given by Versmold and Härtl. The stability ratio for a definite particle size at various electrolyte concentrations could be derived from the rate constants. The smallest particles were shown to be the most stable. This points to a coagulation in the secondary potential energy minimum, which could be proved by calculations of the stability ratio.

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Author information

Authors and Affiliations

  1. Mütek GmbH, Kruppstr. 82 (ETEC), 4300, Essen 1

    P. Ludwig

  2. Institut für Physikalische und Theoretische Chemie, Universität Essen, Universitätsstr. 5-7, 4300, Essen

    G. Peschel

Authors
  1. P. Ludwig
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  2. G. Peschel
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Editor information

K. Hummel J. Schurz

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

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Ludwig, P., Peschel, G. (1988). Evidence for secondary minimum coagulation in a silica hydrosol obtained by dynamic light scattering. In: Hummel, K., Schurz, J. (eds) Dispersed Systems. Progress in Colloid & Polymer Science, vol 77. Steinkopff. https://doi.org/10.1007/BFb0116776

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  • DOI: https://doi.org/10.1007/BFb0116776

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  • Publisher Name: Steinkopff

  • Print ISBN: 978-3-7985-0778-4

  • Online ISBN: 978-3-7985-1692-2

  • eBook Packages: Springer Book Archive

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