STATIC CHAOS MICROFLUID MIXERS USING MICROBLOCK-INDUCED ALTERNATING WHIRL AND MICROCHANNEL-INDUCED LAMINATION

摘要

We characterize two types of noble static chaos microfluid mixers for the applications to Micro Total Analysis Systems (μTAS): an AW-type microfluid mixer, having a series of microblocks along a flow channel for generating alternating direction whirl (AW) flows, and an AWL-type microfluid mixer, coupling the AW-type microfluid mixers with divided microchannels for generating lamination flows between the alternating whirl flows. For generating whirling flow in microchannels, we design rotating block geometry in microchannels. For chaos mixing, we suggest alternating-directional whirling flows in microchannels. AW, AWL-type microfluid mixers are made of PDMS (Polydimethylsiloxane). We quantify mixing state using phenolphthalein visualization experiments and measure pressure drop through microfluid mixers.