Titel
Facile Preparation of Mechanically Robust and Functional Silica/Cellulose Nanofiber Gels Reinforced with Soluble Polysaccharides
Autor*in
Marco Beaumont
Institute of Chemistry of Renewable Resources, Department of Chemistry, University of Natural Resources and Life Sciences Vienna
Elisabeth Jahn
Institute of Chemistry of Renewable Resources, Department of Chemistry, University of Natural Resources and Life Sciences Vienna
... show all
Abstract
Nanoporous silica gels feature extremely large specific surface areas and high porosities and are ideal candidates for adsorption-related processes, although they are commonly rather fragile. To overcome this obstacle, we developed a novel, completely solvent-free process to prepare mechanically robust CNF-reinforced silica nanocomposites via the incorporation of methylcellulose and starch. Significantly, the addition of starch was very promising and substantially increased the compressive strength while preserving the specific surface area of the gels. Moreover, different silanes were added to the sol/gel process to introduce in situ functionality to the CNF/silica hydrogels. Thereby, CNF/silica hydrogels bearing carboxyl groups and thiol groups were produced and tested as adsorber materials for heavy metals and dyes. The developed solvent-free sol/gel process yielded shapable 3D CNF/silica hydrogels with high mechanical strength; moreover, the introduction of chemical functionalities further widens the application scope of such materials.
Stichwort
nanocellulosefunctional nanocompositeaqueous processsol–gelhydrogelsaerogelsfreeze-dryingcryogels
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
Erschienen in
Titel
Nanomaterials
Band
12
Ausgabe
6
ISSN
2079-4991
Erscheinungsdatum
2022
Publication
MDPI AG
Projekt
Kod / Identifikator
J4356
Erscheinungsdatum
2022
Zugänglichkeit
Rechte
Rechteangabe
© 2022 by the authors
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