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Porous Cellulose Acetate Butyrate Foams with a Tunable Bimodality in Foam Morphology Produced with Supercritical Carbon Dioxide
Author(s) -
Jacobs Leon J. M.,
Hurkens Stan A. M.,
Kemmere Maartje F.,
Keurentjes Jos T. F.
Publication year - 2008
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200700353
Subject(s) - materials science , supercritical carbon dioxide , chemical engineering , supercritical fluid , cellulose acetate , porosity , blowing agent , polymer , morphology (biology) , cellulose , carbon dioxide , composite material , organic chemistry , polyurethane , chemistry , biology , genetics , engineering
Porous cellulose acetate butyrate foams with a bimodal cell size distribution were produced using supercritical carbon dioxide as a blowing agent. It is demonstrated that the cell size distribution is tunable, due to the semi‐crystalline nature of the polymer. The resulting morphology will either be homogeneous or bimodal, depending on the depressurization rate. Mercury intrusion porosimetry shows that the produced cellulose acetate butyrate foams possess an open cellular structure.