title: Stability of cellular foam generated from amphoteric surfactant aqueous solution.
abstract: Experiments were carried out to investigate the stability of cellular foam generated from an amphoteric surfactant aqueous solution in a standard bubble column. A typical growth and collapse process were found, and the cellular foam became stable with increasing pH of the solution under both acidic and basic conditions. The critical film thickness calculated from the thinning equation, the well-known Reynolds equation, was between 100 to 400 nm. Of particular note is that the cellular foam was not observed at pH=7 of the liquid.
authors.affiliation: Department of System Science, Graduate School of Engineering, Okayama University of Science, 1-1, Ridai-cho, Okayama 700-0005, Japan.
authors.forename: Kae
authors.initials: K
authors.lastname: Fujita
authors.forename: Tamiya
authors.initials: T
authors.lastname: Kishimoto
authors.forename: Kazutaka
authors.initials: K
authors.lastname: Nagao
authors.forename: Toshiro
authors.initials: T
authors.lastname: Miyahara
mesh_terms: D006863:Hydrogen-Ion Concentration; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013451:Sulfonic Acids / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*
chemical_list: D000644:Quaternary Ammonium Compounds; D013451:Sulfonic Acids; D013501:Surface-Active Agents; C500979:dodecyl sulfobetaine