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Title: Monodisperse emulsions from a microfluidic device : a diffusion NMR and SANS study
Author: Woodward, Andrew James
ISNI:       0000 0004 2670 3855
Awarding Body: University of Bristol
Current Institution: University of Bristol
Date of Award: 2008
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In order to study the oil/water interface, model monodisperse emulsions were produced using a microfluidic device. The device contains a series of channels of oil and water, designed to converge so that the aqueous phase imparts sufficient shear on an oil stream to cause it to break and form droplets. Monodisperse emulsions of diameter 15 to 120 μm have been created by varying the aqueous emulsifier concentration, the flow rates of each phase, the channel geometry, and the oil viscosity PFG-NMR echo attenuation curves of the monodisperse emulsions contain modulations attributed to a diffusion-diffraction effect arising from restricted diffusion within the uniform structures. The position of the minima in the dispersed phase echo data is used to size the emulsions. The dispersed and continuous phase atenuation curves are plotted for a single emulsion, demonstrating different form facPtors due to the bounding structure.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available