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Manufacturing of Three-dimensionally Microstructured Nanocomposites through Microfluidic Infiltration
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Nanofiber self-consistent additive manufacturing process for 3D microfluidics.

Bin Qiu1, Xiaojun Chen2, Feng Xu1

  • 1Fujian Micro/Nano Manufacturing Engineering Technology Research Center, Xiamen University, Xiamen, 361102 China.

Microsystems & Nanoengineering
|September 19, 2022
PubMed
Summary
This summary is machine-generated.

A new 3D printing method, Nanofiber Self-Consistent Additive Manufacturing (NSCAM), enables complex microfluidic chip fabrication. This technique uses porous nanofibers as integrated supports, overcoming limitations of previous methods for creating intricate microfluidic devices.

Keywords:
Electrical and electronic engineeringMicrofluidics

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Area of Science:

  • * Microfluidics and Additive Manufacturing
  • * Materials Science and Engineering
  • * Analytical and Biomedical Devices

Background:

  • * 3D microfluidic devices are crucial for analytical chemistry, sensors, and fluid manipulation.
  • * Current 3D printing methods for microfluidics face challenges like structural collapse and sacrificial material residues, limiting narrow channel fabrication.
  • * Existing techniques struggle with fabricating complex 3D microstructures, hindering advancements in microfluidic applications.

Purpose of the Study:

  • * To introduce a novel 3D printing strategy, Nanofiber Self-Consistent Additive Manufacturing (NSCAM), for integrated 3D microfluidic chip fabrication.
  • * To overcome the limitations of suspended structure collapse and sacrificial material residues in microfluidic device manufacturing.
  • * To demonstrate the fabrication of microdevices with complex features like narrow channels and movable membranes using NSCAM.

Main Methods:

  • * Alternating electrospinning of polyimide nanofibers and electrohydrodynamic jet (E-jet) writing of polydimethylsiloxane (PDMS).
  • * Utilizing porous nanofiber mats as self-supporting structures and percolating media for the construction fluid.
  • * Fabricating 3D channel walls from the composite of cured construction fluid and nanofibers.

Main Results:

  • * Successful fabrication of a microfluidic pressure-gain valve with narrow channels and a movable membrane using NSCAM.
  • * The fabricated valve demonstrated complete closure at 45 kPa with a rapid dynamic response of 52.6 ms.
  • * The NSCAM process effectively avoids sacrificial layer release, simplifying fabrication and enabling complex structures.

Conclusions:

  • * NSCAM is a feasible and promising technique for advanced 3D microfluidic chip fabrication.
  • * The method allows for the creation of microdevices with intricate features such as movable membranes, pillar cavities, and porous scaffolds.
  • * NSCAM holds broad potential for applications in 3D microfluidics, soft robotics, sensors, and organ-on-a-chip systems.