Abstract

Mono-disperse emulsion is of great significance for both chemical and industrial applications. The current study reports a new microfluidic system capable of formation of micro-droplets in liquids for emulsification applications. The new emulsion chip can precisely generate uniform droplets using a novel combination of hydrodynamic-focusing and liquid-chopping techniques. Experimental data show that micro-droplets with a diameter ranging from several to tens of micrometers could be precisely generated. The emulsification behavior at different ratios of sample flow rate (v 1 ) and sheath flow rate (v 2 ) and chopping frequency is systematically investigated. The micro-droplets have a uniform size while compared to previous studies. This novel device can be promising for emulsification and other related applications.

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