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

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 conference › Paper › peer-review

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 language	English
Publication status	Published - 22 Mar 2009
Event	237th ACS National Meeting - Salt Lake City, United States Duration: 22 Mar 2009 → 26 Mar 2009

Conference

Conference	237th ACS National Meeting
Country/Territory	United States
City	Salt Lake City
Period	22/03/09 → 26/03/09

Keywords

cellulose
aerogel
dissolution
lyogels

Cite this

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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.",

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T1 - Ultra lightweight cellulosic aerogels

T2 - 237th ACS National Meeting

AU - Liebner, F

AU - Potthast, A

AU - Rosenau, T

AU - Haimer, E

AU - Loidl, D

AU - Teschegg, S

AU - Neouze, M A

AU - Maitz, Manfred

AU - Seib, Philipp

AU - Werner, C.

PY - 2009/3/22

Y1 - 2009/3/22

N2 - 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.

AB - 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.

KW - cellulose

KW - aerogel

KW - dissolution

KW - lyogels

UR - http://oasys2.confex.com/acs/237nm/techprogram/

M3 - Paper

Y2 - 22 March 2009 through 26 March 2009

ER -

Ultra lightweight cellulosic aerogels: preparation and properties

Abstract

Conference

Keywords

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