Collaborators:
Dr. Shahriar Sajjadi, King's College London
Dr. Ankur Chaurusia
Mr. Tej Singh
Ms. Tanya Anthonypillay
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Energy intensive emulsification:
Investigated shear intensive emulsification method and how droplet deform and break-up under shear.
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Low energy emulsification-The Ouzo effect:
Spontaneous droplet formation occurs by changing thermodynamic variation.
One approach is to change the solubility of phases. This can be achieved by using a solvent which has a higher affinity toward one phase. These can be shown in ternary phase diagrams. by changing the composition in a way to get a final composition in two-phase region, droplets can be formed through local super-saturation.
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Low energy emulsification-Phase inversion:
Spontaneous droplet formation occurs by changing thermodynamic variation.
Another approach is based on using surfactant as the third phase. A nano-dispersion with narrow size distribution forms when a gradual change in thermodynamic variation (temperature, composition) forms a single phase micellar solution (i.e., lamellar or cubic phase). A rapid deviation from this single phase system, forms local excess oil, forming droplets.
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Microfluidics:
Microfluidics have shown a great potential in forming droplets with low dispersity. I have investigated droplet formation and detachment process in microfluidics. As part of the research I developed a platform for producing nano-droplets within microfluidics and preparing results for publication.
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