title: Emulsion inversion induced by CO2.
abstract: Herein it was found that CO(2) could trigger an O/W to W/O emulsion inversion via a W/O/W nanoemulsion. In comparison with the conventionally used liquid or solid additives, the unusual advantage of this method is that the emulsion morphologies can be switched reversibly by the control of CO(2) pressure. Besides, CO(2) can be easily removed by depressurization and thus no extra separation process is needed, and CO(2) can be recycled. Furthermore, other lipophilic gases of ethylene, propylene and isobutane can also induce the O/W to W/O emulsion inversion. A possible mechanism for the gas-triggered emulsion inversion was proposed.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Key Laboratory of Colloid and Interface and Thermodynamics, Chinese Academy of Sciences, PR China. zhangjl@iccas.ac.cn
authors.forename: Jianling
authors.initials: J
authors.lastname: Zhang
authors.forename: Buxing
authors.initials: B
authors.lastname: Han
authors.forename: Yueju
authors.initials: Y
authors.lastname: Zhao
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Yuanhui
authors.initials: Y
authors.lastname: Liu
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D004655:Emulsions / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry
chemical_list: D004655:Emulsions; D013501:Surface-Active Agents; D002245:Carbon Dioxide