Abstract
Surfactants have been used in many fields for improving efficiency in processing but often cause some problems complicated and unsolved. We observed liquids dripping out of an aperture at relatively low Reynolds numbers using a CCD camera, measured mass and velocity of falling drops, and estimated the dynamic surface tension of several aqueous solutions of surfactants: polyoxyethylene (23) lauryl ether, polyoxyethylene (20) stearyl ether, etc. It was concluded that the molecular weight of hydrophilic group in surfactants greatly affects the dynamic surface tension of the solutions at the same mol concentration. We provided the normalized dynamic surface tension and it was shown to be correlated with the surface age multiplied by the molecular weight of the hydrophilic group of the surfactant. A model was presented by considering the dynamic behavior of surfactant molecules approaching a static state to predict the normalized dynamic surface tension of surfactants. The predictions of this model agreed well with the experimental results.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
