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Related Experiment Videos

Integrated continuous microfluidic liquid-liquid extraction.

Jason G Kralj1, Hemantkumar R Sahoo, Klavs F Jensen

  • 1MIT, 77 Massachusetts Avenue, Cambridge, MA, USA. kfjensen@mit.edu

Lab on a Chip
|February 3, 2007
PubMed
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We developed a microfluidic device for continuous liquid-liquid phase separation using a specialized membrane. This technology enables efficient separation of various liquid systems, crucial for chemical processing and analysis.

Area of Science:

  • Chemical Engineering
  • Microfluidics
  • Separation Science

Background:

  • Continuous flow liquid-liquid phase separation is essential in chemical processes.
  • Existing methods can be inefficient or difficult to scale.
  • Microfluidic devices offer precise control and miniaturization for separation tasks.

Purpose of the Study:

  • To develop and characterize a novel microfluidic device for continuous liquid-liquid phase separation.
  • To investigate the use of capillary forces and selective wetting surfaces for enhanced separation.
  • To model the device's performance and determine its operating limits.

Main Methods:

  • Utilized a porous fluoropolymer membrane with selective wetting properties and controlled pore size (0.1-1 microm).

Related Experiment Videos

  • Employed silicon micromachining to fabricate the microfluidic extraction device integrating mixing and separation.
  • Modeled pressure drops and capillary forces to define operating regimes for the membrane phase separator.

    • Main Results:

    • Achieved effective liquid-liquid phase separation in a continuous flow microfluidic device.
    • The device demonstrated high separation throughput due to high pore density.
    • Successfully separated various organic-aqueous and fluorous-aqueous systems, including those with partially miscible compounds.
    • Extraction efficiency was equivalent to one equilibrium stage.

    Conclusions:

    • The developed microfluidic device effectively performs continuous liquid-liquid phase separation.
    • The use of a selectively wetting porous membrane is key to achieving high separation efficiency and throughput.
    • The device operates reliably within determined limits and is suitable for various liquid-liquid systems.