Title :
Monodisperse microparticle generation from aqueous solutions
Author :
Tropmann, A. ; Lass, N. ; Paust, N. ; Ziegler, C. ; Zengerle, R. ; Koltay, P.
Author_Institution :
Lab. for MEMS Applic., Univ. of Freiburg, Freiburg, Germany
Abstract :
We present a new approach for the generation of monodispersed droplets and tailor-made microparticles of complex liquids from a star-shaped nozzle that precisely defines the dispensed droplet sizes. From two aqueous polymer solutions: 30w% Polyvinylpyrrolidone (PVP) (viscosity η ≈ 105 mPas) and 40w% PVP (η ≈ 490 mPas) droplet volumes of 3.9 nl and 3.2 nl respectively were generated employing a star-shaped silicon nozzle with a diameter of 183 μm. From 1w% Mannitol (η ≈ 1 mPas) droplets (100 pl) and particles (22 μm) were generated from a 59 μm nozzle. These results show for the first time particle generation with the StarJet method that could be applicable for the generation of monodispersed powders for use in healthcare, food and home care products.
Keywords :
disperse systems; drops; elemental semiconductors; nozzles; polymer solutions; powders; silicon; PVP; Si; aqueous polymer solution; aqueous solution; dispensed droplet size; food product; healthcare product; home care product; monodisperse microparticle generation; monodispersed droplet; monodispersed powder; polyvinylpyrrolidone; size 183 mum; size 22 mum; size 59 mum; star-shaped silicon nozzle; starjet method; tailor-made microparticle; Electron tubes; Liquids; Metals; Pharmaceuticals; Powders; Reservoirs; Silicon; Mannitol; Polyvinylpyrrolidone; Spray; StarJet; microparticles; monodisperse;
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems Conference (TRANSDUCERS), 2011 16th International
Conference_Location :
Beijing
Print_ISBN :
978-1-4577-0157-3
DOI :
10.1109/TRANSDUCERS.2011.5969626
