A turbidity study on colloidal silica particles in concentrated suspensions using the polydisperse adhesive hard sphere model

Autor:	A. Vrij, M. H. G. M. Penders
Rok vydání:	1990
Předmět:	Colloid Surface coating Chromatography Materials science Chemical engineering Colloidal silica Dispersity General Physics and Astronomy SPHERES Hard spheres Adhesive Physical and Theoretical Chemistry Turbidity
Zdroj:	The Journal of Chemical Physics. 93:3704-3711
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.458799
Popis:	A new type of analysis of turbidimetric measurements is proposed for concentrated sterically stabilized colloidal dispersions. It is applied to dispersions of silica spheres, coated with stearylalcohol in aromatic solvents up to high volume fractions of 0.30–0.40. Baxter’s polydisperse adhesive hard sphere model is used to explain the results. Influence of diameter, stickiness, and polydispersity in diameter on turbidity will be discussed. Model calculations fit the experimental curves very well up to high volume fractions and from the data it can be concluded that there exists a small attraction between the particles.
Databáze:	OpenAIRE
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