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Detachment of colloidal hydrous oxide spheres from flat solids exposed to flow 1. experimental system

, : Detachment of colloidal hydrous oxide spheres from flat solids exposed to flow 1. experimental system. Colloids and Surfaces 16(3-4): 227-248

This article describes an improved technique for studying the detachment of very small particles from solid walls exposed to turbulent shear flow. The technique is useful as an assay of the strength of adhesion between solids immersed in solution. It is also useful in determining the mechanism by which detachment takes place. The experiment is designed so that the particles rest on a window in the outer annular wall of a system of coaxial cylinders. This arrangement permits more rapid counting of particles remaining on precisely the same area throughout the experiment. Results are presented for the detachment of uniform colloidal hydrous oxide spheres from cellulose and glass substrates. Independently controlled variables included the applied shear stress, the size of the particles, the composition of the aqueous solution, and the time of shearing.


DOI: 10.1016/0166-6622(85)80256-0

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