Comparative Study of Monolayer Fatty Acids at the Air/Water Interface
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ABSTRACT:
The behavior of insoluble monolayer of surfactants spread at the air/water interfaces is frequently studied by recording compression isotherms. The compression isotherms given in terms of surface pressure versus mean molecular area are well reproducible for a chosen spreading molecular area of fatty acids, like stearic acid, oleic acid and linoleic acid.
Mathematical modeling of these isotherms is performed by means of surface state equations. In the literature, a great variety of such equations have been proposed. In the present paper is made a study of the compression isotherms of oleic acid (OA) monolayer spread at the air /water interface on acidic aqueous solutions (pH = 2).
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