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Modification of asbestos by siliconates

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Abstract

The ability of some siliconates to hydrophobize and modify the surface of different kinds of asbestos was studied. A 6 wt% aqueous solution of potassium methylsiliconate was used in various quantities. After treatment, the asbestos samples were analysed by IR-spectroscopy, TG-DTA and electron microscopy. Structural changes were found on the asbestos surface, including the appearance of chemical bonds. The studies revealed that the sorption and lyophilic properties of asbestos are lowered, these being the basic preconditions for its injurious action on health.

Zusammenfassung

Zur quantitativen Analyse des Effektes verschiedener Faktoren bei thermogravimetrischen Messungen wie z.B. Probenmenge, Aufheizgeschwindigkeit usw. wurde eine dimensionslose Zahl entwickelt und eingeführt. Die TG-, DTG- undT-Angaben verschiedener gravimetrischer Messungen können direkt zur Berechnung der drei Vergleichskonstanten verwendet werden. Die unter verschiedenen Bedingungen gemessenen TG-Daten für CaCO3 zeigen die Transformationsmethode und ihre Anwendbarkeit für die Berechnung der Korrelation der Messungen.

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Authors and Affiliations

  1. Sofia Technological University, 8 Kl. Ohridski boul., 1156, Sofia, Bulgaria

    Yo. Pelovski, M. Petkova & Iv. Dombalov

  2. Technical University of Budapest, H-1521, Budapest, Hungary

    G. Liptay

Authors
  1. Yo. Pelovski
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  2. M. Petkova
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  3. Iv. Dombalov
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  4. G. Liptay
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Pelovski, Y., Petkova, M., Dombalov, I. et al. Modification of asbestos by siliconates. Journal of Thermal Analysis 42, 485–490 (1994). https://doi.org/10.1007/BF02548530

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