Abstract
A study of the equilibrium and dynamic adsorption properties of octaethylene glycol n-decyl ether (C10E8) has been done by using different tensiometric techniques. The adsorption isotherms have been characterized in the range from 15 to 35 °C at both water−air and water−hexane interfaces. In the same temperature range, the partition coefficient in the water−hexane system has been measured, and this allows the estimation of the standard enthalpy of transfer for C10E8. Moreover, the adsorption kinetics at a water−hexane interface has been studied by a capillary-pressure tensiometer. The results indicate that the adsorption properties, at both water−air and water−hexane interfaces, can effectively be described in the framework of a model in which the possibility of different orientations for the adsorbed molecules is considered. This is also in agreement with the results of the adsorption-kinetics experiments at the water−hexane interface, which cannot be described by a diffusion-controlled model with a Lang...
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