Breakup-based preparation of ultra-thin solid-in-water-in-oil conformal droplets in a microchannel

Droplets encapsulating solid microparticles with a thin coating layer have extensive applications in the fields of biochemical, advanced materials, and inertial confinement fusion. In this work, droplet break-up technique is employed to prepare solid–water–oil (S/W/O) conformal droplets an ultra-thin layer. A microfluidic chip, consisting T-junction Y-junction, was designed constructed for controlled preparation S/W/O by generating–splitting integration. The flow pattern, regime, dynamic mechanisms were also experimentally investigated. results show that there are three regimes: breakup, non-breakup, transition. Two different modes observed regime: without core stagnation stagnation. case stagnation, neck goes through stages: squeezing, transition, pinch-off. When stagnates, one more stage after squeezing. percentage decreases as dispersed phase capillary number increases continuous increases. thickness then rate daughter significantly reduced less affected rate.