Ultra lightweight cellulosic aerogels: preparation and properties

F Liebner, A Potthast, T Rosenau, E Haimer, D Loidl, S Teschegg, M A Neouze, Manfred Maitz, Philipp Seib, C. Werner

Research output: Contribution to conferencePaper

Abstract

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.
Original languageEnglish
Publication statusPublished - 22 Mar 2009
Event237th ACS National Meeting - Salt Lake City, United States
Duration: 22 Mar 200926 Mar 2009

Conference

Conference237th ACS National Meeting
CountryUnited States
CitySalt Lake City
Period22/03/0926/03/09

Keywords

  • cellulose
  • aerogel
  • dissolution
  • lyogels

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