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Production of quasi‐monodisperse emulsions with large droplets using a micromachined device
Author(s) -
Izumida Yasuhiko,
Sugiura Shinji,
Oda Tatsuya,
Satake Mitsuo,
Nakajima Mitsutoshi
Publication year - 2005
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-005-1045-x
Subject(s) - dispersity , nozzle , membrane emulsification , microchannel , materials science , drag , surface micromachining , microfluidics , viscosity , continuous phase modulation , phase (matter) , shear rate , volumetric flow rate , shear (geology) , chemical engineering , nanotechnology , composite material , mechanics , fabrication , chemistry , polymer chemistry , mechanical engineering , electronic engineering , medicine , physics , alternative medicine , organic chemistry , pathology , engineering
The development and operation of a modified method for the preparation of quasi‐monodisperse (CV<16%) emulsions are reported. The device uses a microfabricated‐nozzle (MN) array, produced by micromachining technology, to achieve a higher rate of emulsification [76.8 m 3 /(m 2 ·h)] than previously reported for microchannel (MC) emulsification methods. The dispersed phase is extruded into a continuous phase through the MN, and the emulsions droplets are formed by viscous drag force of the continuous phase. The droplet diameter decreased with an increase in the flow velocity and viscosity in the continuous phase, which was explained by the theoretical model. The range of droplet diameters produced (130 to 370 μm) was larger than in previously reported MC emulsification, membrane emulsification, and shear‐rupturing methods.