On Aging of Acid-Catalyzed Silica Sols—A Dynamic Light Scattering Study |
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Authors: | Unger B Hähnert M Nitzsche R |
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Institution: | (1) Bundesanstalt für Materialforschung und -prüfung, 12200 Berlin, Germany;(2) MALVERN Instruments GmbH, Rigipsstr. 19, 71083 Herrenberg, Germany |
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Abstract: | Dynamic light scattering experiments in acid-catalyzed silica sols are discussed. It is shown that in spite of limited parameter accuracy and limited absolute knowledge of the particle sizes, the scattering data from various experiments are comparable with one another and give information about structural differences. Measurements at various angles indicate changes between non-spherical and nearly spherical particles and allow the estimation of gelling times before gelation. |
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Keywords: | acid-catalyzed silica sols aging structural development dynamic light scattering |
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