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A 3D-MICROPRINTED COAXIAL NOZZLE FOR FABRICATING LONG, FLEXIBLE MICROFLUIDIC TUBING.

Olivia M Young1, Bailey M Felix2, Mark D Fuge1

  • 1Department of Mechanical Engineering, University of Maryland, College Park, MD, USA.

Proceedings. IEEE International Conference on Micro Electro Mechanical Systems
|March 14, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a 3D printing method to create custom, long, flexible microfluidic tubing for medical and soft robotics. This technique allows precise control over tubing dimensions, enhancing its versatility for advanced applications.

Keywords:
3D PrintingAdditive ManufacturingDirect Laser WritingMicrofluidicsTubingTwo-Photon Polymerization

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Area of Science:

  • Materials Science and Engineering
  • Additive Manufacturing
  • Microfluidics

Background:

  • Emerging applications in medical and soft robotics require customizable, long, flexible meso/microfluidic tubing.
  • Existing fabrication methods may lack the necessary precision and flexibility for these advanced applications.

Purpose of the Study:

  • To present a novel hybrid additive manufacturing strategy for fabricating customizable microfluidic tubing.
  • To demonstrate the ability to control tubing dimensions (inner and outer diameters) through pressure adjustments.

Main Methods:

  • A three-step hybrid additive manufacturing process combining Vat Photopolymerization (VPP) using Liquid-Crystal Display (LCD) 3D printing and Two-Photon Direct Laser Writing (DLW).
  • Printing a bulk microfluidic device, followed by microprinting a coaxial nozzle.
  • Extrusion of paraffin oil and photocurable resin through the nozzle into a PDMS channel for UV curing to form the tubing.

Main Results:

  • Successfully fabricated flexible microfluidic tubing of arbitrary lengths (>10 cm) composed of polymerized photomaterial.
  • Demonstrated tunable inner and outer diameters by adjusting input pressures of the liquid-phase photomaterial.
  • Showcased potential for ex situ DLW (esDLW) fabrication by printing microfluidic structures directly onto the tubing.

Conclusions:

  • The hybrid 3D printing strategy offers a versatile method for producing customized microfluidic tubing.
  • The ability to precisely control tubing dimensions and integrate with further microfabrication enhances its utility for advanced applications.
  • This technique holds significant promise for the development of next-generation medical devices and soft robotic systems.