Selective retardation of perfume oil evaporation from oil-in-water emulsions stabilized by either surfactant or nanoparticles.
We have used dynamic headspace analysis to investigate the evaporation rates of perfume oils from stirred oil-in-water emulsions into a flowing gas stream. We compare the behavior of an oil of low water solubility (limonene) and one of high water solubility (benzyl acetate). It is shown how the evaporation of an oil of low water solubility is selectively retarded and how the retardation effect depends on the oil volume fraction in the emulsion. We compare how the evaporation retardation depends on the nature of the adsorbed film stabilizing the emulsion. Surfactant films are less effective than adsorbed films of nanoparticles, and the retardation can be further enhanced by compression of the adsorbed nanoparticle films by preshrinking the emulsion drops.
Surfactant & Colloid Group, Department of Chemistry, University of Hull, Hull HU6 7RX, United Kingdom.
Bernard P
BP
Binks
Paul D I
PD
Fletcher
Benjamin L
BL
Holt
Pascal
P
Beaussoubre
Kenneth
K
Wong
D000327:Adsorption; D045703:Emulsifying Agents / Q000737:chemistry*; D004655:Emulsions / Q000737:chemistry*; D004867:Equipment Design; D053758:Nanoparticles / Q000737:chemistry; D009821:Oils / Q000737:chemistry*; D010476:Perfume / Q000737:chemistry*; D012995:Solubility; D013501:Surface-Active Agents / Q000737:chemistry; D013696:Temperature; D014867:Water / Q000737:chemistry*
D045703:Emulsifying Agents; D004655:Emulsions; D009821:Oils; D010476:Perfume; D013501:Surface-Active Agents; D014867:Water