Generation of water-in-oil and oil-in-water microdroplets in polyester-toner microfluidic devices

E. Piccin, D. Ferraro, P. Sartori, E. Chiarello, M. Pierno, and G. Mistura

Sensors and Actuators B, 2014, doi:10.1016/j.snb.2014.02.042      PDF

This paper demonstrates that disposable polyester-toner microfluidic devices are suitable to produce either water-in-oil (W/O) or oil-in-water (O/W) droplets without using any surface treatment of the microchannels walls. Highly monodisperse W/O and O/W emulsions were generated in T-junction microdevices by simply adding appropriate surfactants to the continuous phase. The dispersion in size of droplets generated at frequencies up to 500 Hz was always less than about 2% over time intervals of a couple of hours.

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