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Updated: Jul 7, 2026

Three-Dimensionally Printed Microfluidic Cross-flow System for Ultrafiltration/Nanofiltration Membrane Performance Testing
Published on: February 13, 2016
Pore design and engineering for filters and membranes
Richard Holdich1, Serguei Kosvintsev, Iain Cumming
1Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, UK. r.g.holdich@lboro.ac.uk
Surface filtration membranes with slot pore designs offer advantages in microfiltration. Slot length is crucial for effectively filtering deforming particles like oil drops from water.
Area of Science:
- Materials Science
- Chemical Engineering
- Fluid Dynamics
Background:
- Defining pore size in filtration is challenging.
- Surface filtration membranes offer advantages over depth filtration in microfiltration.
- Modern manufacturing enables the production of surface filtering membranes.
Purpose of the Study:
- To investigate the effectiveness of slot pore designs in surface filtration membranes.
- To determine the optimal design parameters for slot pores in filtration.
- To evaluate the performance of slot pore membranes in separating deforming particles.
Main Methods:
- Analysis of fluid flow through slot pore designs.
- Experimental testing with suspended materials, including oil drops.
- Utilizing surface filtering membranes with precisely manufactured slot pores.
Main Results:
- A suitable pore design for filtration is an array of long, thin slots.
- Fluid flow analysis suggested short slots might be adequate.
- Experimental data indicated that slot length is critical for filtration efficiency.
- Effective filtration of deforming particles like oil drops was achieved using long slots and controlled flow.
Conclusions:
- Surface filtration membranes with slot pore designs are effective for microfiltration.
- Slot length is a key parameter influencing the filtration of deforming particles.
- Controlled flow through long slot membranes allows for the separation of oil drops from water.
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