THE EFFECT OF THE KAOLINITE-WATER INTERFACIAL MODIFICATIONS ON INTERPARTICLE INTERACTIONS

Rok, strany: 1997, 61 - 68

The nature of the interactions required for optimal strength and density of spatial structures of natural and modified aluminosilicate systems is discussed. Rheological curves obtained for highly concentrated dispersions evidence on plastic mechanism of deformation upon compression. The role of interfacial composition for the origin of interparticle contacts and their transformations during structure formation in concentrated dispersions of kaolinite and aluminosilicate glass is considered. The study of exchangeable cations Ca²⁺, Al³⁺ and Mg²⁺ as well as heating showed their effect on the strength and number of indiviual contacts. The acid-base properties of kaolinite particle surfaces are analyzed in comparison with the interfacial reactions of glass. The relative numbers of acidic Bronsted and Lewis surface active sites are correlated to structural parameters measured upon heating of the natural and cationsubstituted forms of kaolinite. Extremal dependence of individual contacts number on pH of aqueous solutions as well as extremal dependencies of specific wetting heat of kaolinite and glass samples in the range of temperatures were obtained. The significant alteration of hydrophilic properties as a result of chemisorption of silicaorganic liquids is accompanied by efficient structure formation in modified dispersions of kaolinite: total strength of the calcinated samples up to 2.5 times higher than that of initial ones.

ISO 690:

A. Pavlova, L. 1997. THE EFFECT OF THE KAOLINITE-WATER INTERFACIAL MODIFICATIONS ON INTERPARTICLE INTERACTIONS. In Geologica Carpathica Clays, vol. 6, no.1, pp. 61-68.

APA:

A. Pavlova, L. (1997). THE EFFECT OF THE KAOLINITE-WATER INTERFACIAL MODIFICATIONS ON INTERPARTICLE INTERACTIONS. Geologica Carpathica Clays, 6(1), 61-68.