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Related Experiment Video

Updated: Mar 29, 2026

Encapsulation and Permeability Characteristics of Plasma Polymerized Hollow Particles
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Perfluorinated Ionomer Dispersion Preparation: Autoclaving vs. High-Pressure Homogenizing.

Sofia M Morozova1, Nataliia V Talagaeva2, Nadezhda N Dremova2

  • 1Moscow Center for Advanced Studies, Kulakova Str. 20, Moscow 123592, Russia.

Membranes
|March 27, 2026
PubMed
Summary
This summary is machine-generated.

A new high-pressure homogenization method offers a faster, safer way to create perfluorinated sulfonic acid ionomer (PFSAI) dispersions for hydrogen fuel cells. This technique enables higher PFSAI concentrations, improving membrane fabrication.

Keywords:
AquivionNafionfilm castinghigh-pressure homogenizerperfluorosulfonic acid dispersion

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Chemical Engineering

Background:

  • Perfluorinated sulfonic acid ionomer (PFSAI) dispersions are crucial for fabricating ion-conducting membranes and catalyst layers in hydrogen fuel cells.
  • The properties of these membranes are significantly influenced by PFSAI conformation and concentration, which depend on the dispersion's liquid phase.

Purpose of the Study:

  • To introduce a novel, safer, and faster method for preparing PFSAI dispersions using a high-pressure homogenizer.
  • To compare this new method with the conventional autoclave technique for commercial dispersion preparation.

Main Methods:

  • Preparation of water/alcohol dispersions using Nafion and Aquivion PFSAI via high-pressure homogenization.
  • Characterization of dispersion viscosity and PFSAI aggregate size for both homogenization and autoclave techniques.
  • Analysis of membrane morphology fabricated from different dispersions using the casting method, followed by annealing.

Main Results:

  • The high-pressure homogenization method allows for higher PFSAI concentrations and is faster and safer than the autoclave technique.
  • Dispersion viscosity and PFSAI aggregate size were comparable between the two preparation methods.
  • Membrane morphology showed initial differences based on dispersion type, which were eliminated after annealing.

Conclusions:

  • High-pressure homogenization is a viable and advantageous alternative for preparing PFSAI dispersions.
  • Membrane morphology analysis serves as a valuable tool for evaluating the quality of PFSAI membranes.
  • This work advances the fabrication of materials for efficient hydrogen fuel cells.