Ultra light-weight cellulose aerogel bodies can be obtained in three subsequent steps: (1) dissolution of cellulose in molten N-methylmorpholine-N-oxide monohydrate (NMMO∙H2O) at 110-120°C and casting the viscous mass into moulds, (2) regeneration of the cellulose aiming at preserving the cellulose solute structure upon extraction of the solidified cellulose/NMMO bodies with ethanol, e.g., and (3) drying of the lyogels with supercritical carbon dioxide (scCO2). The materials having an average density of 46-69 mg cm-3, a hierarchical pore structure consisting of macro and micro pores, specific surface area of 190 to 310 m2 g-1 will be discussed with regard to production and process optimization, and a wide range of their chemical, physicochemical, mechanical and biocompatibility properties.
|Publication status||Published - 22 Mar 2009|
|Event||237th ACS National Meeting - Salt Lake City, United States|
Duration: 22 Mar 2009 → 26 Mar 2009
|Conference||237th ACS National Meeting|
|City||Salt Lake City|
|Period||22/03/09 → 26/03/09|