Theory and Experiment on the Measurement of Kinetic Rate Constants for Surfactant Exchange at an Air/Water Interface

Observations of Singularity Formation during the Capillary Collapse and Bubble Pinch-off of a Soap Film Bridge

“…Adsorption and desorption rates for sodium oleate (Na + CH 3 (CH 2 ) 7 CH= =CH(CH 2 ) 7 COO − ), the surfactant used in the soap film experiment, are not available. However, a larger organic molecule C 12 E 6 (C 12 H 25 (OCH 2 CH 2 ) 6 OH) has a similar surface tension (65 dyn/cm) as reported by Pan et al (11) and a molecular weight that is roughly 100% larger.…”

Determination of Surface Dilational Viscosity Using the Oscillating Bubble Method

“…The related transport processes of such phase transitions have a great influence on the rheological properties of the surface. Similar problems include the comparison with other bubble and drop experiments (54)(55)(56)(57). Different dynamic processes at the surface can lead to different values of κ and η in Eq.…”

Microscale tipstreaming in a microfluidic flow focusing device

“…[37][38][39] Thus these surfactants are good candidates for study of surfactant-mediated tipstreaming in microfluidic devices, enabling a systematic investigation of the role of different mass transfer mechanisms in the process. A wide variation in surfactant solution properties such as critical micelle concentration, equilibrium surface tension, and equilibrium constants, which contain adsorption and desorption coefficients, can be achieved by adjusting the lengths of the ethoxylated head groups and carbon tail groups while maintaining the same general chemistry of the surfactant molecule.…”