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Updated: Apr 13, 2026

Three-Dimensionally Printed Microfluidic Cross-flow System for Ultrafiltration/Nanofiltration Membrane Performance Testing

Three-Dimensionally Printed Microfluidic Cross-flow System for Ultrafiltration/Nanofiltration Membrane Performance Testing

Published on: February 13, 2016

Ultrafiltration modeling of non-ionic microgels.

Rafael Roa¹, Emiliy K Zholkovskiy, Gerhard Nägele

¹Forschungszentrum Jülich, Institute of Complex Systems (ICS-3), Jülich, 52425, Germany. r.roa@fz-juelich.de.

|April 30, 2015

Summary

This study models membrane ultrafiltration (UF) for microgels, revealing that particle permeability significantly enhances permeate flux by reducing surface concentration. Accurate transport coefficients are crucial for reliable UF predictions.

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Last Updated: Apr 13, 2026

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Area of Science:

Colloid and Surface Science
Chemical Engineering
Materials Science

Background:

Membrane ultrafiltration (UF) separates and enriches particles using pressure-driven flow.
Performance depends on membrane properties, particle interactions, and transport phenomena like concentration polarization (CP).
Existing models often lack detailed consideration of particle-specific transport properties.

Purpose of the Study:

To develop a macroscopic model for cross-flow UF of non-ionic microgels.
To incorporate concentration-dependent transport coefficients for permeable microgel dispersions.
To analyze the impact of particle properties and operating conditions on UF performance.

Main Methods:

Macroscopic modeling of cross-flow ultrafiltration.
Utilizing semi-analytic expressions for collective diffusion and viscosity of permeable particle dispersions.
Analyzing concentration polarization layer properties and permeate flux under varying conditions.

Main Results:

Accurate specification of concentration-dependent transport coefficients is vital for predicting UF performance.
Microgel solvent permeability is a key factor in UF modeling.
Increased particle permeability leads to lower surface concentration and higher permeate flux.

Conclusions:

The developed model provides reliable predictions for UF of microgel dispersions.
Particle solvent permeability is a critical parameter that can be leveraged to optimize UF processes.
Understanding these transport phenomena is essential for efficient and cost-effective filtration.