Abstract
The sorption of surface-active substances (surfactants), namely, C18–C21 synthetic fatty carboxylic acids (distillation residues of their production), a number of amines, and amides from films of pure, normal paraffinic hydrocarbons such as heptane, octane, nonane, decane, and pentadecane deposited on St3 steel immersed in 0.5 M NaCl solution, has been studied. Concentrations have been obtained at which the degree of surface filling with surface-active substances approaches unity. It is shown that surfactant adsorption takes place on an energetically inhomogeneous surface, and it seems that in a number of cases it is realized by the donor-acceptor interaction mechanism.
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