Rheological, adsorption and stability behaviour of hydrophobic aerosil particles in binary liquid mixtures

Gábor Machula, Imre Dékány

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Abstract

Rheological and optical properties of hydrophobic aerosil particles were examined in benzene-n-heptane and methanol-benzene mixtures. Adsorption measurements on these mixtures proved that the composition of the adsorption layer is a crucial factor determining the adhesion between the particles. The Bingham yield stress and the Ree-Eyring parameters (from rheological measurements) are influenced significantly by the composition of the interfacial layer calculated from adsorption measurements in binary liquids. The minimum of the free energy function for the interfacial layer determines the stability of the particles dispersed in binary mixtures.

Original languageEnglish
Pages (from-to)331-348
Number of pages18
JournalColloids and Surfaces
Volume61
Issue numberC
DOIs
Publication statusPublished - Dec 12 1991

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ASJC Scopus subject areas

  • Engineering(all)

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