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Updated: Dec 30, 2025

Automated Lipid Bilayer Membrane Formation Using a Polydimethylsiloxane Thin Film
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Low-Permeability Poly(ether Ether Ketone)-Based Ampholytic Membranes.

Riccardo Narducci1,2,3, Luca Pasquini1,2,3, Jean-François Chailan4

  • 1University of Rome Tor Vergata (URoma2), Dip. Ingegneria Industriale, 00133, Roma, Italy.

Chempluschem
|January 24, 2020
PubMed
Summary
This summary is machine-generated.

New amphoteric membranes made from poly(ether ether ketone) offer tunable ion conductivity and ultra-low vanadium permeability. These properties make them ideal for high-performance separator membranes in various applications.

Keywords:
amphoteric membranescation permeabilityionic conductivitypH dependencepoly(ether ether ketone)

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Area of Science:

  • Polymer Science
  • Materials Science
  • Electrochemistry

Background:

  • Poly(ether ether ketone) (PEEK) is a high-performance thermoplastic with excellent mechanical and thermal properties.
  • Ion-exchange membranes are crucial components in electrochemical devices, such as fuel cells and flow batteries.
  • Developing membranes with tunable ion conductivity and low permeability is essential for improving device efficiency and longevity.

Purpose of the Study:

  • To synthesize and characterize novel amphoteric ion-exchange membranes based on modified poly(ether ether ketone).
  • To investigate the thermal, mechanical, electrical, and permeability properties of the prepared membranes.
  • To evaluate the potential of these membranes as high-performance separators.

Main Methods:

  • Modified sulfamination route involving sulfonation of PEEK, conversion to chlorosulfonic moieties, reaction with dimethylamine, and hydrolysis.
  • Characterization of membrane properties including thermal stability (TGA), mechanical strength (tensile testing), ion conductivity (electrochemical impedance spectroscopy), and vanadium ion permeability.
  • Tuning ion conductivity by adjusting the acidic or basic medium.

Main Results:

  • Successfully prepared amphoteric membranes with both sulfonate and sulfonamide groups.
  • Membranes exhibited excellent thermal and mechanical stability.
  • Achieved ultra-low vanadium ion permeability.
  • Demonstrated tunable ion conductivity dependent on the surrounding medium (acidic or basic).

Conclusions:

  • The developed amphoteric PEEK-based membranes possess a unique combination of tunable ion conductivity and low ion permeability.
  • These characteristics make them highly suitable for use as advanced separator membranes in electrochemical applications.
  • The modified sulfamination route offers a versatile approach for designing functional ion-exchange membranes.