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Polymers 2017, 9(10), 473; https://doi.org/10.3390/polym9100473

Imidazole, a New Tunable Reagent for Producing Nanocellulose, Part I: Xylan-Coated CNCs and CNFs

1
Chair of Forest Biomaterials, Faculty of Environment and Natural Resources, Albert-Ludwig-University of Freiburg, Werthmannstr 6, 79085 Freiburg, Germany
2
FIT-Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
3
Division of Chemistry of Renewables Resources, Department of Chemistry, University of Natural Resources and Life Sciences Vienna, Muthgasse 18, 1190 Vienna, Austria
*
Author to whom correspondence should be addressed.
Received: 15 August 2017 / Revised: 15 September 2017 / Accepted: 22 September 2017 / Published: 27 September 2017
(This article belongs to the Special Issue Cellulose Nanomaterials)
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Abstract

Imidazole is reported to be an effective reactant for the production of nanocellulose from hardwood pulp. The morphologies and surface properties of the nanocellulose can be simply tailored according to the water content in the imidazole system: with pure imidazole, cellulose nanofibrils (CNFs) in a yield of 10 wt % can be produced. With 25 wt % of water in imidazole, cellulose nanocrystals (CNCs) are obtained in 20 wt % yield. Both nanocelluloses exhibit crystallinity indices in the order of 70%. Interestingly, they retain the original xylan from the pulp with ca. 9–10 wt % of residual xylan content. View Full-Text
Keywords: imidazole; cellulose nanocrystals; cellulose nanofibrils; xylan imidazole; cellulose nanocrystals; cellulose nanofibrils; xylan
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Mao, J.; Abushammala, H.; Hettegger, H.; Rosenau, T.; Laborie, M.-P. Imidazole, a New Tunable Reagent for Producing Nanocellulose, Part I: Xylan-Coated CNCs and CNFs. Polymers 2017, 9, 473.

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