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Related Experiment Videos

A mesh microcontactor for 2-phase reactions.

David A Wenn1, John E A Shaw, Bina Mackenzie

  • 1Bio & Chemical Instrumentation Group, CRL Ltd., Dawley Road, Hayes, Middlesex, UKUB3 1HH.

Lab on a Chip
|April 22, 2004
PubMed
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New mesh microcontactor structures enable efficient mass transfer and reactions between immiscible fluid phases. These devices are ideal for kinetic studies of biphasic reactions, offering precise control and separate phase removal.

Area of Science:

  • Chemical Engineering
  • Materials Science
  • Analytical Chemistry

Background:

  • Traditional methods for studying biphasic reactions often suffer from mixing and dispersion issues.
  • Efficient mass transfer between immiscible phases is crucial for many chemical processes and kinetic studies.
  • Developing microfluidic devices for controlled interfacial contact is an active area of research.

Purpose of the Study:

  • To design, fabricate, and demonstrate the utility of mesh microcontactor structures for biphasic reactions.
  • To enable precise control over mass transfer conditions in microscale reactors.
  • To facilitate kinetic studies of reactions involving immiscible liquid/liquid or gas/liquid phases.

Main Methods:

  • Fabrication of nickel micromesh structures (approx. 5 µm pores) via electrodeposition and etching.

Related Experiment Videos

  • Assembly of reactor enclosures using milled glass and metal components.
  • Utilizing flow-through and static modes with defined fluid layer depths (100 µm) and volumes (100 µL).

    • Main Results:

    • Successful demonstration of mesh microcontactor function for both liquid/liquid and gas/liquid systems.
    • Validated system performance using optical monitoring of fluorescein diacetate hydrolysis and oxygen absorption reactions.
    • Achieved separate phase removal without significant sample dispersion, suitable for kinetic analysis.

    Conclusions:

    • Mesh microcontactor structures provide a robust platform for studying biphasic reactions at the microscale.
    • The design allows for controlled interfacial contact and mass transfer, crucial for kinetic investigations.
    • These microfluidic devices offer a versatile tool for a range of analytical and chemical applications involving immiscible phases.