|AERODYNAMIC FLOW FOCUSING|
Principle of technology
In aerodynamic flow focusing, a laminar jet of precursor liquid passes a nozzle, of appropriate diameter, and is guided to an exit orifice which is centrally in line with the axis of the nozzle. A pressure drop between the nozzle and the exit orifice leads to an aerodynamical effect, so that the jet has a smaller diameter when it passes the orifice as compared to the nozzle. The size of the droplets is determined by the product flow rate, the pressure drop and the nozzle diameter, and can be controlled down to 10 micrometers. The droplets are further processed into particles by cross-linking or polymerization (hardening process) of the precursor liquid. The hardening process must be very fast in order to achieve optimal particle quality.
Aerodynamic flow focusing technology is optimal for the production of microparticles in the size range of 10 to 200 micrometers at relatively low volumetric production rates.
Materials that can be processed