title: Microfluidic preparation and self diffusion PFG-NMR analysis of monodisperse water-in-oil-in-water double emulsions.
abstract: Monodisperse water-in-oil-in-water (WOW) double emulsions have been prepared using microfluidic glass devices designed and built primarily from off the shelf components. The systems were easy to assemble and use. They were capable of producing double emulsions with an outer droplet size from 100 to 40 μm. Depending on how the devices were operated, double emulsions containing either single or multiple water droplets could be produced. Pulsed-field gradient self-diffusion NMR experiments have been performed on the monodisperse water-in-oil-in-water double emulsions to obtain information on the inner water droplet diameter and the distribution of the water in the different phases of the double emulsion. This has been achieved by applying regularization methods to the self-diffusion data. Using these methods the stability of the double emulsions to osmotic pressure imbalance has been followed by observing the change in the size of the inner water droplets over time.
authors.affiliation: Nestec Ltd., Nestle Research Center, PO Box 44, 1000 Lausanne 26, Switzerland. eric.hughes@rdls.nestle.com
authors.forename: Eric
authors.initials: E
authors.lastname: Hughes
authors.forename: Abid Aslam
authors.initials: AA
authors.lastname: Maan
authors.forename: Simone
authors.initials: S
authors.lastname: Acquistapace
authors.forename: Adam
authors.initials: A
authors.lastname: Burbidge
authors.forename: Michael L
authors.initials: ML
authors.lastname: Johns
authors.forename: Deniz Z
authors.initials: DZ
authors.lastname: Gunes
authors.forename: Pascal
authors.initials: P
authors.lastname: Clausen
authors.forename: Axel
authors.initials: A
authors.lastname: Syrbe
authors.forename: Julien
authors.initials: J
authors.lastname: Hugo
authors.forename: Karin
authors.initials: K
authors.lastname: Schroen
authors.forename: Vincent
authors.initials: V
authors.lastname: Miralles
authors.forename: Tim
authors.initials: T
authors.lastname: Atkins
authors.forename: Richard
authors.initials: R
authors.lastname: Gray
authors.forename: Philip
authors.initials: P
authors.lastname: Homewood
authors.forename: Klaus
authors.initials: K
authors.lastname: Zick
mesh_terms: D004058:Diffusion; D004655:Emulsions / Q000737:chemistry*; D004867:Equipment Design; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation*; D009821:Oils / Q000737:chemistry*; D009997:Osmotic Pressure; D010316:Particle Size; D014867:Water / Q000737:chemistry*
chemical_list: D004655:Emulsions; D009821:Oils; D014867:Water