Abstract
In this paper, micro droplets are generated in a microfluidic focusing contactor and then they move sequentially in a free-flowing mode (no wall contact). For this purpose, two different micro-flow glass devices (hydrophobic and hydrophilic) were used. During the study, the influence of the flow rate of the water phase and the oil phase on the droplet size and size distribution was investigated. Moreover, the influence of the oil phase viscosity on the droplet size was analyzed. It was found that the size and size distribution of the droplets can be controlled simply by the aqueous phase flow rate. Additionally, 2D simulations to determine the droplet size were performed and compared with the experiment.
Highlights
Continuous-flow systems are widely used for chemical synthesis and flow chemistry has become a versatile approach in modern synthetic chemistry [1]
It is not surprising that there are only few reports on active macromixing topic [38,39,40]. Another method that allows for good mixing by virtue of convection in the nanoparticle synthesis is the application of micro droplets
A strong effect on droplet size is related to the change in oil phase flow rate (Figure 7B)
Summary
Continuous-flow systems are widely used for chemical synthesis and flow chemistry has become a versatile approach in modern synthetic chemistry [1]. For some low scale applications, the micro flow systems are more economical as compared with conventional processing [8,9,10]. A simple and even inherent advantage of these micro-flow systems is related to their small inner volumes, which means small volumes of processed chemicals used during experimental synthesis [17,20]. There is a large number of reports showing potential application of micro flow systems for continuous nanoparticles synthesis [6,21,22,23,24], composite materials [25,26,27,28,29,30], as well as for metal ion extraction and separation [31].
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