Interaction Forces between Bubbles in the Presence of Novel Responsive Peptide Surfactants
Thakshila S Balasuriya, Raymond R Dagastine
LANGMUIR | AMER CHEMICAL SOC | Published : 2012
Reversibly switchable surfactants are increasingly important for controlling foam stability in many industrial applications because they can be recycled as foaming and antifoaming agents. Novel stimuli responsive peptide surfactants have been previously studied to classify the molecular conformation at the air-water interface before and after switching. In this study, Atomic Force Microscopy (AFM) was used to correlate the peptide conformation to directly measured changes in colloidal interaction forces between immobilized air bubbles before and after switching. The surface tension values extracted from the AFM force measurements were compared to macroscopic pendant drop measurements to help..View full abstract
The authors thank F. Grieser and D. Y. C. Chan for their valuable discussions. We thank the ARC for funding and the PFPC for providing infrastructure support.