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Microfluidic-SANS: flow processing of complex fluids.

Carlos G Lopez1, Takaichi Watanabe1, Anne Martel2

  • 1Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK.

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|January 13, 2015
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This summary is machine-generated.

This study combines microfluidics with small angle neutron scattering (SANS) to probe complex fluid behavior at the molecular level. The developed microfluidic devices enable detailed analysis of fluid dynamics and molecular alignment in soft matter.

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Area of Science:

  • Soft Matter Physics
  • Fluid Dynamics
  • Materials Science

Background:

  • Understanding complex and non-Newtonian fluid flow at the molecular level is crucial for their application.
  • Current methods face challenges in detailed molecular-level analysis of fluid dynamics.

Purpose of the Study:

  • To demonstrate the coupling of microfluidics with small angle neutron scattering (SANS).
  • To investigate molecular re-orientation and alignment in complex fluids under flow.
  • To assess the potential of microfluidic-SANS for high-throughput studies.

Main Methods:

  • Rapid prototyping of microfluidic devices using frontal photopolymerization.
  • Utilizing microdevices with high neutron transmission and low scattering background.
  • Performing small angle neutron scattering (SANS) on single microchannels (down to 60 μm width).

Main Results:

  • Successfully obtained scattering data from microchannels in the scattering vector range of 0.01-0.3 Å⁻¹.
  • Observed molecular re-orientation and alignment in model complex fluids (lamellar systems) under flow.
  • Demonstrated the capability to probe real-space dimensions from approximately 10-600 Å.

Conclusions:

  • Microfluidic-SANS is a powerful technique for studying complex fluids at the molecular level.
  • The developed microfluidic devices are suitable for high-pressure, broad-solvent compatibility studies.
  • This approach offers significant potential for high-throughput and flow processing studies in soft matter.