Low-Temperature, Surface-Mediated Foaming of Polymer Films

Low-Temperature, Surface-Mediated Foaming of Polymer Films

Ultraporous thin polymer films (see Figure) are generated using physical constraints imposed by external surfaces (hard plates) and internal surfaces (hard nanoparticles and soft micelles) via foaming with supercritical CO2. The constraints serve as diffusion barriers and/or heterogeneous nucleation...

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Veröffentlicht in:Advanced materials (Weinheim) 2004-06, Vol.16 (12), p.989-994
Hauptverfasser: Siripurapu, S., DeSimone, J. M., Khan, S. A., Spontak, R. J.
Format: Artikel
Sprache:eng
Schlagworte:
Carbon dioxide
Carbon dioxide, supercritical fluid (SCF CO2)
Polymer foams
Porous materials
supercritical fluid (SCF CO2)
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Zusammenfassung:Ultraporous thin polymer films (see Figure) are generated using physical constraints imposed by external surfaces (hard plates) and internal surfaces (hard nanoparticles and soft micelles) via foaming with supercritical CO2. The constraints serve as diffusion barriers and/or heterogeneous nucleation sites. Use of CO2‐philic copolymers further enables microcellular foaming at reduced pressures with liquid CO2.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200306068