“A small drop of toluene (2-10 ml) was deposited on a glass slide and covered with a micellar solution of sodium dodecyl sulfate (SDS). Due to solubilization the drop eventually vanished, and the rate of change of the basal radius of the drop and its contact angle were measured as functions of time.
It is seen that the mass transfer resistance is mainly an "interfacial resistance" which remains a constant through time. Although the rates as such increase with increasing surfactant concentrations, they eventually reach a constant value. Model suggests the actual rate constant decreases inversely with the surfactant concentrations. It will also be shown that fluid mechanics plays an important role and the "rollback" mechanism takes an unconventional route here.
Other systems show more complex features. There appear to be two stages, interfacial resistance control passing into diffusion control. However, there is a cusp separating the two that is not easily explained”--Abstract, page iii.
Neogi, P. (Partho), 1951-
Ybarra, Robert M.
Le, Vy Khoi
Chemical and Biochemical Engineering
M.S. in Chemical Engineering
University of Missouri--Rolla
vii, 35 pages
© 2002 Rajesh Shah, All rights reserved.
Thesis - Restricted Access
Surface active agents -- Testing
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Shah, Rajesh, "Kinetics of solubilization of an oil drop by a surfactant solution from a solid surface" (2002). Masters Theses. 2159.
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