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Article Dans Une Revue Microfluidics and Nanofluidics Année : 2014

Parallelised production of fine and calibrated emulsions by coupling flow-focusing technique and partial wetting phenomenon

Résumé

The capacity of microfluidic technology to fabricate monodisperse emulsion droplets is well estab- lished. Parallelisation of droplet production is a pre- requisite for using such an approach for making high- quality materials for either fundamental or industrial applications where product quantity matters. Here, we investigate the emulsification efficiency of parallelised drop generators based on a flow-focusing geometry when incorporating the role of partial wetting in order to make emulsion droplets with a diameter below 10 µm. Confine- ment intrinsically encountered in microsystems intensifies the role played by interfaces between liquids and solids. We thus take advantage of partial wetting to enhance the maximum confinement accessible due to liquid flow focusing. We compare the performances brought by partial wetting to more established routes such as step emulsifi- cation. We show that the step configuration and the partial wetting regime are both well suited for being parallelised and thus open the way to the production of fine and cali- brated emulsions for further applications. Finally, this new route of emulsification that exploits partial wetting between the fluids and the channel walls opens possibilities to the formation of substantially smaller droplets, as required in many fields of application
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Dates et versions

hal-00991916 , version 1 (20-04-2016)

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Celine Cohen, Rory Giles, Victoria Sergeyeva, Nitesh Mittal, Patrick Tabeling, et al.. Parallelised production of fine and calibrated emulsions by coupling flow-focusing technique and partial wetting phenomenon. Microfluidics and Nanofluidics, 2014, 17 (5), pp.959-966. ⟨10.1007/s10404-014-1363-5⟩. ⟨hal-00991916⟩
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