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Related Experiment Video

Updated: May 16, 2025

Deposition of Porous Sorbents on Fabric Supports
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Highly Breathable and Protective Carbon Fabrics.

Hyeonji Oh1, Horacio Lopez-Marques1, Noah P Wamble1

  • 1McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States.

ACS Applied Materials & Interfaces
|April 2, 2025
PubMed
Summary

Carbon molecular sieve (CMS) membranes offer superior water vapor transport and barrier properties for breathable protective fabrics. Optimized CMS membranes outperform commercial options, providing enhanced protection with advanced material science.

Keywords:
breathable fabricscarbon molecular sieve membraneschemical warfare agentsselective permeationwater vapor transport

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Area of Science:

  • Materials Science
  • Polymer Science
  • Chemical Engineering

Background:

  • High water vapor transport and selective barrier properties are crucial for advanced materials.
  • Breathable protective fabrics require materials that balance comfort with robust protection.

Purpose of the Study:

  • To investigate the water vapor transport and barrier performance of carbon molecular sieve (CMS) membranes.
  • To explore the potential of CMS membranes for breathable protective fabric applications.

Main Methods:

  • Fabrication of CMS membranes via pyrolysis of precursor membranes.
  • Systematic variation of pyrolysis temperatures, membrane structures (symmetric and asymmetric Matrimid CMS), and polymer concentrations.
  • Testing of water vapor transport and barrier properties.

Main Results:

  • CMS membranes pyrolyzed at 550 °C with 10% polymer concentration demonstrated exceptional performance.
  • These membranes exhibited 2.6 times higher water vapor transport than commercial breathable fabrics.
  • The membranes provided 7.5 times higher protective capacity, comparable to butyl rubber, due to their sub-nanometer pores.

Conclusions:

  • Optimized CMS membranes present a promising solution for next-generation breathable protective fabrics.
  • The study highlights the potential of tailored CMS membranes for advanced material applications requiring selective transport and barrier functions.