Abstract
The dynamic surface tension of Triton X-100 solutions was measured using the maximum bubble pressure method (MBPM). The data obtained depended on the geometry and material of the capillaries employed. It is shown that reliable results are obtained with short capillaries of hydrophobic internal surfaces. The effect of the ratio of the bubble volume to measuring system volume on the measured dynamic surface tension is studied. Recommendations are given for the optimum choice of the capillary to be employed in the MBPM. High-speed video imaging is used for studying the hydrodynamics of the liquid meniscus after bubble separation in hydrophilic and hydrophobic capillaries.
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