Investigating the role of a poorly soluble surfactant in a thermally driven 2D microfoam. Issue 33 (5th August 2016)

• Record Type: Journal Article
• Authors: Miralles, Vincent; Rio, Emmanuelle; Cantat, Isabelle; Jullien, Marie-Caroline
• Is Part Of: Soft matter. Volume 12:Issue 33(2016)
• Page Start: 7056
• Page End: 7062
• Publication Date: 2016-08-05
• Subjects: Soft condensed matter -- Periodicals; 530.413
• DOI: 10.1039/c6sm00686h
• Languages: English
• ISSNs: 1744-683X

Abstract

Abstract : Investigating surface visco-elasticity in a thermally driven 2D microfoam. Abstract : Foam drainage dynamics is known to be strongly affected by the nature of the surfactants stabilising the liquid/gas interface. In the present work, we consider a 2D microfoam stabilized by both soluble (sodium dodecylsulfate) and poorly soluble (dodecanol) surfactants. The drainage dynamics is driven by a thermocapillary Marangoni stress at the liquid/gas interface [V. Miralles et al., Phys. Rev. Lett., 2014, 112, 238302] and the presence of dodecanol at the interface induces interface stress acting against the applied thermocapillary stress, which slows down the drainage dynamics. We define a damping parameter that we measure as a function of the geometrical characteristics of the foam. We compare it with predictions based on the interface rheological properties of the solution.