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Issue 11, 2008
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Cationic surface functionalization of cellulose nanocrystals

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The surface of cellulose nanocrystals, prepared by sulfuric acid hydrolysis of cotton, was rendered cationic through a reaction with epoxypropyltrimethylammonium chloride. The resultant nanocrystal suspensions were characterized by ζ-potential, conductometric titration and polarized light microscopy. Atomic force microscopy (AFM) showed no change in the size or shape of the nanocrystals, but the functionalization process reversed the surface charge and led to a reduction of the total surface charge density. These modifications led to stable aqueous suspensions of nanocrystalline cellulose with unexpected gelling and rheological properties. Shear birefringence was observed, but no liquid crystalline chiral nematic phase separation was detected.

Graphical abstract: Cationic surface functionalization of cellulose nanocrystals

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Publication details

The article was received on 23 Apr 2008, accepted on 11 Jul 2008 and first published on 29 Aug 2008

Article type: Paper
DOI: 10.1039/B806789A
Citation: Soft Matter, 2008,4, 2238-2244

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    Cationic surface functionalization of cellulose nanocrystals

    M. Hasani, E. D. Cranston, G. Westman and D. G. Gray, Soft Matter, 2008, 4, 2238
    DOI: 10.1039/B806789A

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