Macroporous Polymer Foams by Hydrocarbon Templating

Porous polymeric media (polymer foams) are utilized in a wide range of applications, such as thermal and mechanical insulators, solid supports for catalysis, and medical devices. A process for the production of polymer foams has been developed. This process, which is applicable to a wide range of po...

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Veröffentlicht in:Proceedings of the National Academy of Sciences - PNAS 2000-02, Vol.97 (5), p.1970-1975
Hauptverfasser: Shastri, Venkatram Prasad, Martin, Ivan, Langer, Robert
Format: Artikel
Sprache:eng
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Zusammenfassung:Porous polymeric media (polymer foams) are utilized in a wide range of applications, such as thermal and mechanical insulators, solid supports for catalysis, and medical devices. A process for the production of polymer foams has been developed. This process, which is applicable to a wide range of polymers, uses a hydrocarbon particulate phase as a template for the precipitation of the polymer phase and subsequent pore formation. The use of a hydrocarbon template allows for enhanced control over pore structure, porosity, and other structural and bulk characteristics of the polymer foam. Polymer foams with densities as low as 120 mg/cc, porosity as high as 87%, and high surface areas (20 m2/g) have been produced. Foams of poly(L-lactic acid), a biodegradable polymer, produced by this process have been used to engineer a variety of different structures, including tissues with complex geometries such as in the likeness of a human nose.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.97.5.1970