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Cited by 240

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Supramolecular Structure Characterization of Cellulose II Nanowhiskers Produced by Acid Hydrolysis of Cellulose I Substrates

Open access
Sèbe, Gilles, Ham-Pichavant, Frédérique, Ibarboure, Emmanuel, Koffi, Akissi Lydie Chantal, Tingaut, Philippe·2012·Biomacromolecules

Abstract

Cellulose II nanowhiskers (CNW-II) were produced by treatment of microcrystalline cellulose with sulfuric acid by both controlling the amount of H(2)SO(4) introduced and the time of addition during the hydrolysis process. The crystalline structure was confirmed by both XRD and (13)C CP-MAS NMR spectroscopy. When observed between crossed polarizers, the cellulose II suspension displayed flow birefringence and was stable for several months. The CNW-II nanowhiskers were significantly smaller than the cellulose I nanowhiskers (CNW-I) and had a rounded shape at the tip. The CNW-II average length and height were estimated by AFM to be 153 ± 66 and 4.2 ± 1.5 nm, respectively. An average width of 6.3 ± 1.7 nm was found by TEM, suggesting a ribbon-shape morphology for these whiskers. The average dimensions of the CNW-II elementary crystallites were estimated from the XRD data, using Scherrer's equation. A tentative cross-sectional geometry consistent with both XRD and NMR data was then proposed and compared with the geometry of the CNW-I nanowhiskers.

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Metadata

Authors
Sèbe, G., Ham-Pichavant, F., Ibarboure, E., Koffi, A. L. C., & Tingaut, P.
Venue
Biomacromolecules
Published
2012-02-01
Volume
13
Issue
2
Pages
570-578
ISSN
  • 1525-7797 (ISSN-L)
  • 1526-4602
OpenAlex
W2015006866
Cited by
240
References
6
FWCI
4.69
Type
journal article
Language
en
Open access
green

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