1977 Volume 50 Issue 12 Pages 3144-3148
The frequency dependence of the damping coefficient of a capillary wave was measured in decylamine hydrochloride solutions. The observed relaxations were well expressed by the double-relaxation equations. From the concentration dependence of the relaxation parameters obtained, the relaxations at low and high frequencies were attributed to the adsorption-desorption and ion-pair formation reactions on the surface, respectively. Furthermore, the adsorption rate constants are related to the hydrophobic and hydrophilic properties of the surfactants.
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