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Title of Journal: Cellulose

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Abbravation: Cellulose

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Springer Netherlands

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DOI

10.1016/0166-4328(85)90050-6

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1572-882X

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Surface properties and porosity of highly porous

Authors: Marco Beaumont Anett Kondor Sven Plappert Claudia Mitterer Martina Opietnik Antje Potthast Thomas Rosenau
Publish Date: 2016/10/15
Volume: 24, Issue: 1, Pages: 435-440
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Abstract

Recently a new member of the nanocellulose family was introduced a cellulose II gel consisting of nanostructured and spherical particles In this study we compared two different drying techniques to obtain highly porous powders from this gel with preserved meso and macroporous nanostructure first freezedrying after solvent exchange to tBuOH and second supercritical drying of the respective EtOH alcogel The approaches yielded aerogel powders with surface areas of 298 and 423 m2/g respectively Both powders are amphiphilic and possess energetically heterogeneous surfaces with dominating dispersive term of the surface energy in the range of 50–52 mJ/m2 as determined by a combination of physicochemical surface characterization techniques such as iGC BET and SEM Despite the lower surface area the cheaper and more widespread method freezedrying yields a more polar and reactive cryogel

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  15. The effects of ionizing radiation on the cellulose of woodfree paper
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