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Flow lithography in ultraviolet-curable polydimethylsiloxane microfluidic chips.

Junbeom Kim, Heseong An, Yoojin Seo

  • 1Department of Chemical and Biological Engineering, Korea University, Seoul 02841, South Korea.

Biomicrofluidics
|May 5, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces ultraviolet (UV)-curable polydimethylsiloxane (PDMS) for Flow Lithography (FL). This new material enhances microparticle synthesis precision and productivity by overcoming conventional PDMS limitations.

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Area of Science:

  • Materials Science
  • Microfluidics
  • Biotechnology

Background:

  • Flow Lithography (FL) synthesizes hydrogel microparticles using microfluidics and photolithography.
  • Conventional polydimethylsiloxane (PDMS) microfluidic chips have limitations including shrinkage and interfacial delamination.

Purpose of the Study:

  • To evaluate ultraviolet (UV)-curable PDMS as an alternative material for FL.
  • To address the limitations of conventional PDMS in microfluidic chip fabrication for FL.

Main Methods:

  • Utilized UV-curable PDMS (X-34-4184) for fabricating microfluidic chips for FL.
  • Compared properties of UV-cured PDMS chips with conventional PDMS chips, including oxygen permeability, shrinkage, and burst pressure.
  • Demonstrated improved microparticle synthesis using stop flow lithography with UV-cured PDMS chips.

Main Results:

  • UV-curable PDMS exhibited comparable oxygen permeability to conventional PDMS.
  • Absence of shrinkage in UV-cured PDMS facilitated precise microstructure replication.
  • UV-cured PDMS chips showed significantly enhanced interfacial bonding with a burst pressure of ~0.9 MPa.
  • Achieved a substantial increase in productivity for synthesizing polyethylene glycol diacrylate microparticles.

Conclusions:

  • UV-curable PDMS is a superior alternative to conventional PDMS for FL applications.
  • UV-cured PDMS microfluidic chips offer enhanced precision and bonding strength.
  • This technology provides a versatile platform for microfluidic applications requiring precise structure replication and robust bonding.