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Related Experiment Video

Updated: Jul 21, 2025

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
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Thermo-Sensitive Microgel/Poly(ether sulfone) Composited Ultrafiltration Membranes.

Wei Fan1, Shaoxiong Zhu1, Jingjing Nie2

  • 1State Key Laboratory of Motor Vehicle Biofuel Technology, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China.

Materials (Basel, Switzerland)
|July 29, 2023
PubMed
Summary

Thermo-sensitive microgels (PMO-MGs) were incorporated into poly (ether sulfone) (PES) membranes. These PMO-MGs/PES membranes exhibit enhanced hydrophilicity, antifouling properties, and tunable water flux with temperature changes.

Keywords:
membranemicrogelsthermo-sensitivityultrafiltration

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Membrane Technology

Background:

  • Ultrafiltration membranes are crucial for water purification.
  • Enhancing membrane performance, particularly hydrophilicity and antifouling properties, remains a key challenge.
  • Thermo-sensitive materials offer potential for dynamic control over membrane functions.

Purpose of the Study:

  • To synthesize thermo-sensitive poly (ethylene glycol) methacrylate (OEGMA475) and 2-(2-methoxyethoxy) ethyl methacrylate (MEO2MA) based microgels (PMO-MGs).
  • To fabricate poly (ether sulfone) (PES) composite membranes incorporating PMO-MGs using non-solvent-induced phase separation (NIPS).
  • To investigate the impact of PMO-MGs on membrane surface properties, hydrophilicity, antifouling performance, and thermo-responsive flux behavior.

Main Methods:

  • Surfactant-free emulsion polymerization for PMO-MG synthesis.
  • Non-solvent-induced phase separation (NIPS) for membrane fabrication.
  • Characterization using transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), and contact angle goniometry.

Main Results:

  • Spherical PMO-MGs with an average diameter of 323 ± 12 nm were synthesized.
  • PMO-MGs incorporation significantly improved membrane surface hydrophilicity and antifouling properties.
  • Pure water flux increased from 217.6 L·m-2·h-1 (pure PES) to 369.7 L·m-2·h-1 (20 wt% PMO-MGs/PES) at 20 °C.
  • A thermo-sensitive flux behavior was observed, with flux increasing from 369.7 to 618.7 L·m-2·h-1 as temperature rose from 20 to 45 °C.

Conclusions:

  • PMO-MGs can be effectively incorporated into PES membranes via NIPS.
  • The composite membranes exhibit enhanced surface hydrophilicity and superior antifouling capabilities.
  • The developed membranes possess tunable thermo-sensitive properties, offering potential for advanced filtration applications.