Dynamic surface tension measured with an integrated sensor-actuator using electrolytically generated gas bubbles

Wouter Olthuis, Alex Volanschi, A. Volanschi, Piet Bergveld

    Research output: Contribution to journalArticleAcademicpeer-review

    8 Citations (Scopus)


    In this paper, a new, simple method to determine dynamic surface tension in aqueous solutions is reported, explained and experimentally verified. By function integration, a small device is obtained. Apart from control and interface electronics no external components or systems are necessary. Instead of the conventional sparging, we use the (cathodic) electrolysis of water at an actuator to produce gas bubbles in situ. The actuator can also function as the sensor for the bubble frequency by monitoring either its overpotential or its impedance. A simple model is given, by which the dependency of the bubble frequency on the dynamic surface tension can be predicted. Experimental results are in agreement with this model and show the feasibility of the proposed method.
    Original languageUndefined
    Pages (from-to)126-132
    Number of pages7
    JournalSensors and actuators. B: Chemical
    Issue number49
    Publication statusPublished - 1998


    • IR-73826
    • METIS-111839
    • Surfactants
    • Electrolytically generated gas bubbles
    • Dynamic surface tension

    Cite this