1962 Volume 35 Issue 2 Pages 285-289
In order to throw light on the interaction of the stearic acid monolayer with aluminum ion in underlying solutions, surface pressure measurements were carried out on (1) the stearic acid monolayer spread on 10−4mol./l. aluminum chloride solution, (2) the aluminum distearate monolayer spread on distilled water, and (3) the aluminum distearate monolayer spread on 10−4mol./l. aluminum chloride. It was found that their pressure-area curves were all solid expanded films over characteristic pH ranges, with the curve of 1 especially analogous to that of 3. In the limiting area-pH curves, there seemed to be a little partial disagreement between them which would not be essential. From these results it was concluded that the monolayer of stearic acid interacting with aluminum ion might be analogous to the two-dimensional polymeric aluminum distearate adsorbing aluminum ion.
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