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Cellulose

Erschienen in:

06.05.2017 | Original Paper

TEMPO-mediated surface oxidation of cellulose nanocrystals (CNCs)

verfasst von: Carole Fraschini, Grégory Chauve, Jean Bouchard

Erschienen in: Cellulose | Ausgabe 7/2017

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Abstract

Cellulose nanocrystals were successfully oxidized with sodium hypochlorite using catalytic amounts of sodium bromide and 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) radical at pH 10 in water. Carboxylate groups were selectively introduced at the surface of the crystals up to a total acid content of 1200 mmol kg⁻¹ without damaging the integrity of the crystals. The final acid content can easily be tuned by varying the amount of oxidant introduced. The effect of temperature, the quantity of oxidant and co-catalyst on the reaction kinetics were studied. Several methods were used for the characterization of the oxidized material like field emission scanning electron microscopy, diffuse reflectance infrared spectroscopy and thermogravimetric analysis.

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Nächster Artikel Aerogel microspheres based on cellulose nanofibrils as potential cell culture scaffolds

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Titel: TEMPO-mediated surface oxidation of cellulose nanocrystals (CNCs)
verfasst von: Carole Fraschini
Grégory Chauve
Jean Bouchard
Publikationsdatum: 06.05.2017
Verlag: Springer Netherlands
Erschienen in: Cellulose / Ausgabe 7/2017
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-017-1319-5

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