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A New Direction in Microfluidics: Printed Porous Materials.

Hanno Evard1, Hans Priks2, Indrek Saar1

  • 1Institute of Chemistry, Chair of Analytical Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia.

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|July 2, 2021
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Summary

This study demonstrates novel fabrication methods for microfluidic systems using porous materials and advanced printing techniques. All three developed methods proved suitable for creating functional microfluidic devices.

Keywords:
direct write printingmicrofluidicsphotolithographyporous material microfluidicsscreen printing

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Microfluidics

Background:

  • Microfluidic systems are crucial for various analytical applications.
  • Existing microfluidic paper-based analytical devices utilize porous materials.
  • Novel fabrication approaches are needed to expand the capabilities of microfluidics.

Purpose of the Study:

  • To investigate the feasibility of a new direction in microfluidics.
  • To demonstrate novel methods for fabricating microfluidic systems using alternative porous materials.
  • To evaluate the suitability of printed microfluidic chips for practical applications.

Main Methods:

  • Fabrication of microfluidic systems using three distinct methods.
  • Method 1: Photolithography on a porous monolithic polymer sheet.
  • Method 2: Screen printing of silica gel and gypsum.
  • Method 3: Modified 3D printing of silica gel with a polyvinyl acetate binder.

Main Results:

  • Successful fabrication of microfluidic systems via three novel methods.
  • Characterization of printed chip parameters including material strength, printing accuracy, height, wetting, and repeatability.
  • All three developed fabrication approaches demonstrated suitability for microfluidic applications.

Conclusions:

  • The study successfully demonstrated a novel approach to microfluidics fabrication.
  • The developed methods offer versatile and viable options for creating microfluidic systems.
  • This work opens new avenues for the design and application of porous material-based microfluidics.