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TEMPO-mediated surface oxidation of cellulose nanocrystals (CNCs)

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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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Acknowledgments

The authors would like to acknowledge the financial support of the ArboraNano Network, the Transformative Technology Program from the Government of Canada and the Ministère des Ressources Naturelles et de la Faune du Québec.

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Authors and Affiliations

  1. Cellulosic Biomaterials Department, FPInnovations, 570 Boulevard Saint Jean, Pointe-Claire, QC, H9R 3J9, Canada

    Carole Fraschini, Grégory Chauve & Jean Bouchard

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  1. Carole Fraschini
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  2. Grégory Chauve
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  3. Jean Bouchard
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Correspondence to Carole Fraschini.

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Fraschini, C., Chauve, G. & Bouchard, J. TEMPO-mediated surface oxidation of cellulose nanocrystals (CNCs). Cellulose 24, 2775–2790 (2017). https://doi.org/10.1007/s10570-017-1319-5

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  • DOI: https://doi.org/10.1007/s10570-017-1319-5

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