Cellulose

, Volume 13, Issue 6, pp 679–687 | Cite as

TEMPO-mediated surface oxidation of cellulose whiskers

Open Access
Article

Abstract

Cellulose whiskers resulting from HCl acid hydrolysis of tunicin were subjected to TEMPO-mediated oxidation under various conditions and the extent of the resulting oxidation was characterized by Fourier-transform infrared spectroscopy (FT-IR), conductimetry, X-Ray diffraction analysis and transmission electron microscopy (TEM). With degree of oxidation of up to 0.1 the samples kept their initial morphological integrity and native crystallinity, but at their surface the hydroxymethyl groups were selectively converted to carboxylic groups, thus imparting a negative surface charge to the whiskers. When dispersed in water these oxidized whiskers did not flocculate and their suspensions appeared birefringent when viewed between cross polarizers, thus indicating a liquid crystalline behavior.

Keywords

Birefringent suspensions Cellulose whiskers TEMPO oxidation 

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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Youssef Habibi
    • 1
    • 2
  • Henri Chanzy
    • 1
  • Michel R. Vignon
    • 1
  1. 1.Institut de Chimie Moléculaire de Grenoble (ICMG), Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS)Joseph Fourier UniversityGrenoble cedex 9France
  2. 2.Equipe des Parois Végétales et Matériaux FibreuxUMR FARE (INRA/URCA)Reims cedex 2France

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