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Polymer particles with various shapes and morphologies produced in continuous microfluidic reactors.

Zhihong Nie1, Shengqing Xu, Minseok Seo

  • 1Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario, M5S 3H6 Canada.

Journal of the American Chemical Society
|June 2, 2005
PubMed
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We developed a microfluidic method for scalable production of core-shell droplets and polymer capsules. This technique allows precise control over droplet characteristics and enables the synthesis of various polymer particle shapes.

Area of Science:

  • Materials Science
  • Chemical Engineering
  • Fluid Dynamics

Background:

  • Microfluidic devices offer precise control over fluid manipulation.
  • Continuous production of monodisperse core-shell structures is challenging.
  • Synthesis of polymer particles with controlled morphology is of interest.

Purpose of the Study:

  • To present a novel microfluidic approach for continuous and scalable production of core-shell droplets and polymer capsules.
  • To demonstrate control over droplet size, shell thickness, and core number/location.
  • To synthesize polymer particles with diverse shapes and morphologies.

Main Methods:

  • Utilized capillary instability-driven break-up of a two-immiscible-fluid jet in a microfluidic device.
  • Achieved precise emulsification control for monodisperse core-shell droplet formation.

Related Experiment Videos

  • Employed fast throughput photopolymerization for shell solidification and particle generation.

    • Main Results:

    • Successfully produced highly monodisperse core-shell droplets with controlled core diameters and shell thicknesses.
    • Demonstrated control over the number and spatial arrangement of cores within droplets.
    • Generated polymer particles with various morphologies, including spheres, truncated spheres, hemispheres, and single/multicore capsules.

    Conclusions:

    • The reported microfluidic method enables continuous and scalable synthesis of core-shell droplets and polymer capsules.
    • The technique provides precise control over droplet and particle characteristics, including shape.
    • This approach is versatile for producing a range of polymer particles for various applications.