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Related Experiment Video

Updated: Feb 20, 2026

Casting Protocols for the Production of Open Cell Aluminum Foams by the Replication Technique and the Effect on Porosity
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Open Cell Aerogel Foams via Emulsion Templating.

Nicholas Teo1, Sadhan C Jana1

  • 1Department of Polymer Engineering The University of Akron , 250 South Forge Street, Akron, Ohio 44325-0301, United States.

Langmuir : the ACS Journal of Surfaces and Colloids
|October 20, 2017
PubMed
Summary

This study fabricates open cell aerogel foams using syndiotactic polystyrene (sPS) via water-in-oil emulsion templating. The resulting macrovoids enhance aerogel openness and structural properties.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Aerogel foams offer unique properties but often lack controlled macroporosity.
  • Syndiotactic polystyrene (sPS) is a versatile polymer for material fabrication.
  • Emulsion-templated methods can create porous structures.

Purpose of the Study:

  • To fabricate open cell aerogel foams from syndiotactic polystyrene (sPS).
  • To investigate the role of water-in-oil emulsion templating in creating macrovoids.
  • To correlate structural characteristics with final aerogel foam properties.

Main Methods:

  • Fabrication of sPS aerogel foams using a water-in-oil emulsion-templating method.
  • Preparation of surfactant-stabilized sPS/toluene/water emulsions.

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  • Solvent exchange with ethanol and supercritical CO2 drying.

    • Main Results:

    • Successful fabrication of open cell aerogel foams from sPS.
    • Formation of macrovoids (tens of micrometers) from emulsified water droplets, enhancing structural openness.
    • Presence of customary macropores (50-200 nm) derived from the sPS gel matrix.

    Conclusions:

    • The water-in-oil emulsion-templating method effectively produces sPS aerogel foams with enhanced openness.
    • Macrovoids significantly influence the structural characteristics and properties of the aerogel foams.
    • Further evaluation of macrovoid structural features provides insights into tailoring aerogel properties.