Measurement of the dynamic surface tension by the maximum bubble pressure method. IV. Surface tension of aqueous solutions of sodium dodecyl sulfate

Abstract

Aqueous solutions of sodium dodecyl sulfate were used to demonstrate the evaluation of dynamic surface tension by the maximum bubble pressure method. The interval observed between the release of two subsequent bubbles was reduced to the effective age of the solution surface by a method described in previous papers. The dependence of the surface tension on the age of the solution surface calculated in this manner was compared with results given in the literature as obtained by the jet method for very short ages and by the Wilhelmy plate method for older ages. The possibility of extrapolating the dynamic y values for an infinite age of the surface has been considered and, finally, the effect of temperature on the surface tension was checked. The said method makes it possible to evaluate the dynamic surface tension over a wide range of surface ages.