Supramolecular Structure Characterization of Cellulose II Nanowhiskers Produced by Acid Hydrolysis of Cellulose I Substrates - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Biomacromolecules Année : 2012

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

Résumé

Cellulose II nanowhiskers (CNW-II) were produced by treatment of microcrystalline cellulose with sulfuric acid by both controlling the amount of H2SO4 introduced and the time of addition during the hydrolysis process. The crystalline structure was confirmed by both XRD and C-13 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
Fichier non déposé

Dates et versions

hal-00747623 , version 1 (31-10-2012)

Identifiants

Citer

Gilles Sèbe, Frédérique Ham-Pichavant, Emmanuel Ibarboure, Akissi Lydie Chantal Koffi, Philippe Tingaut. Supramolecular Structure Characterization of Cellulose II Nanowhiskers Produced by Acid Hydrolysis of Cellulose I Substrates. Biomacromolecules, 2012, 13 (2), pp.570-578. ⟨10.1021/bm201777j⟩. ⟨hal-00747623⟩

Collections

CNRS INC-CNRS LCPO
1580 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More