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Synthesis and characterisation of nanofibrillar cellulose aerogels

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Abstract

We prepared from cellulose fibres monolithic aero- and cryogels. Cellulose is dissolved in hydrated calciumthiocyanate melt, gelled, aged and dried by several methods. The density of cellulose aerogels produced by supercritical drying is in the range between 10 and 60 kg/m3 with a surface area of 200–220 m2/g. The cellulose cryogels produced by freeze drying exhibit a maximum surface area of 160 m2/g. Sputtered cellulose aero- and cryogels are examined with a scanning electron microscope. The results are discussed with respect to the literature and simple mathematical models.

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Authors and Affiliations

  1. Institut für Materialphysik im Weltraum, DLR (German Aerospace Center), Porz-Wahnheide, Linder Höhe, 51147, Koeln, Germany

    Sandra Hoepfner, Lorenz Ratke & Barbara Milow

Authors
  1. Sandra Hoepfner
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  2. Lorenz Ratke
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  3. Barbara Milow
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Correspondence to Lorenz Ratke.

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Hoepfner, S., Ratke, L. & Milow, B. Synthesis and characterisation of nanofibrillar cellulose aerogels. Cellulose 15, 121–129 (2008). https://doi.org/10.1007/s10570-007-9146-8

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  • DOI: https://doi.org/10.1007/s10570-007-9146-8

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