The preparation of lignocellulosic aerogels from ionic liquid solutions

Olli Aaltonen (Corresponding Author), Olli Jauhiainen

    Research output: Contribution to journalArticleScientificpeer-review

    173 Citations (Scopus)


    Nanofibrillar aerogels were prepared from cellulose, spruce wood and from mixtures of cellulose, lignin and xylan. The lignocellulosic polymers were first dissolved in an ionic liquid and coagulated from solution by adding aqueous ethanol. The obtained gel was washed with ethanol and liquid carbon dioxide and finally dried by releasing the carbon dioxide from the porous structure at supercritical temperature to obtain the aerogel. The bulk densities of the biopolymer aerogels ranged from 25 to 114 g/l and the internal surface areas (BET) from 108 to 539 m2/g depending on the biopolymer mix and on the polymer concentration in the ionic liquid solution. All aerogels were compressible and consisted of nanofibrillar biomaterial network with open-pore structure.
    Original languageEnglish
    Pages (from-to)125-129
    Number of pages5
    JournalCarbohydrate Polymers
    Issue number1
    Publication statusPublished - 2009
    MoE publication typeA1 Journal article-refereed


    • Aerogels
    • Cellulose
    • Lignocellulose
    • Lignin
    • Xylan
    • Critical point drying
    • Supercritical
    • Carbon dioxide
    • Ionic liquids


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