Surface-Tension-Driven Flow Due to the Adsorption and Desorption of Colloidal Particles

When a dilute colloidal suspension of 50-μm polyamide particles is exposed to a deformable interface, spontaneous flow occurs. This flow is orderly, reproducible, and shows a proportional dependence on particle concentration. The same type of flow was also observed in a silicon oil suspension. Placi...

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Veröffentlicht in:	Journal of colloid and interface science 2001-10, Vol.242 (2), p.279-283
Hauptverfasser:	Casson, Kenneth, Johnson, Duane
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences capillary charge Chemistry colloidal particles Colloidal state and disperse state Exact sciences and technology Gas-liquid interface and liquid-liquid interface General and physical chemistry interfacial tension interfacial tension gradients Marangoni flow Organic polymers Physical and chemical studies. Granulometry. Electrokinetic phenomena Physicochemistry of polymers Properties and characterization Solution and gel properties Surface physical chemistry
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Beschreibung
Zusammenfassung:	When a dilute colloidal suspension of 50-μm polyamide particles is exposed to a deformable interface, spontaneous flow occurs. This flow is orderly, reproducible, and shows a proportional dependence on particle concentration. The same type of flow was also observed in a silicon oil suspension. Placing a glass plate on the interface dampens the flow, eventually extinguishing it completely. Upon removing the plate, the flow resumes. This leads to the belief that a new surface effect is being observed and may be important in a number of industrial applications where a free interface of a colloidal suspension is present.
ISSN:	0021-9797 1095-7103
DOI:	10.1006/jcis.2001.7870