J. H. Clint
Apr 1, 1973
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Influential Citations
15
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Abstract
Abstract The deposition from a mixed monolayer of calcium behenate and 3-(docosyl dimethyl ammonio)propane-1-sulfonate (i.e., C22 sultaine) onto a glass slide which repeatedly traverses the monolayer is limited to particular periods in the cycle resulting in the formation of a multilayer on only a portion of the plate. These results arise from incomplete drainage by a zippering mechanism of a wetting film entrained by the plate. A simple hydrodynamic theory can explain the results and shows the importance of the contact angle in the process. X-Ray diffraction measurements confirm a distribution of deposited material consistent with such a mechanism. Results of calculations are included which demonstrate how capillary forces and dispersion forces are responsible for the initial and final stages of zippering, respectively.