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Related Experiment Video

Updated: Jan 20, 2026

High-resolution Patterning Using Two Modes of Electrohydrodynamic Jet: Drop on Demand and Near-field Electrospinning
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Electrohydrodynamic Patterning of Polyethersulfone Membranes.

Ali Malekpour Koupaei1, Hadi Nazaripoor1, Mohtada Sadrzadeh1

  • 1Department of Mechanical Engineering, 10-367 Donadeo Innovation Center for Engineering, Advanced Water Research Lab (AWRL) , University of Alberta , Edmonton , Alberta T6G 1H9 , Canada.

Langmuir : the ACS Journal of Surfaces and Colloids
|August 17, 2019
PubMed
Summary
This summary is machine-generated.

Electrohydrodynamic (EHD) patterning offers a simple, cost-effective method to create microstructured polyethersulfone (PES) membranes, significantly reducing fouling. This moldless technique avoids complex facilities and precise conditions for scalable membrane surface modification.

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Surface Science

Background:

  • Membrane surface microstructuring is key to mitigating fouling.
  • Existing methods for surface patterning are often costly, time-consuming, and complex.
  • There is a need for simpler, more accessible techniques for membrane surface modification.

Purpose of the Study:

  • To investigate the electrohydrodynamic (EHD) patterning process for creating microstructured polyethersulfone (PES) membranes.
  • To theoretically predict and experimentally validate the dimensions of surface patterns.
  • To demonstrate a cost-effective and straightforward method for fabricating antifouling membranes.

Main Methods:

  • Utilized electrohydrodynamic (EHD) patterning to create surface patterns on PES microfiltration membranes.
  • Employed linear stability analysis and nonlinear numerical simulation for theoretical prediction of pillar dimensions.
  • Applied nonsolvent-induced phase separation for structure solidification at room temperature.
  • Characterized the fabricated pillars' height and width.

Main Results:

  • Successfully formed an array of raised columnar structures (pillars) on PES membrane surfaces.
  • The developed EHD method operates at room temperature and is moldless.
  • Pillar dimensions were measured as low as 31 ± 5 μm in height and 98 ± 12 μm in width.
  • The process does not require sophisticated facilities or precise control.

Conclusions:

  • EHD patterning is a viable and simple technique for creating microstructured PES membranes.
  • This method offers a cost-effective and scalable approach to antifouling membrane fabrication.
  • The moldless nature and room temperature operation make this technique highly practical for widespread implementation.