Periodic Expansion and Contraction Phenomena in a Pendant Droplet Associated with Marangoni Effect.

ABSTRACT: A spontaneous oscillation between the expansion and contraction of a nitrobenzene pendant droplet containing di-(2-ethylhexyl)phosphoric acid (DEHPA) was observed in an aqueous phase under alkaline conditions. We described this phenomenon as the spontaneous oscillation of the oil-water interfacial tension. The oscillation characteristics such as the induction period and the interfacial-tension oscillation frequency were investigated under different temperatures and aqueous phase polarities. The effects of the interfacial tension of the biphasic pendant-droplet, the surface excess of the surfactant molecules, and the amount of nitrobenzene elution from the droplet to the aqueous phase on the oscillation characteristics were investigated. Consequently, the periodic expansion-contraction osci

SUBMITTER: Onoda K 

PROVIDER: S-EPMC8745923 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature