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Article Dans Une Revue Macromolecular Bioscience Année : 2009

Acetylation of Cellulose Nanowhiskers with Vinyl Acetate under Moderate Conditions

Résumé

A novel and straightforward method for the surface acetylation of cellulose nanowhiskers by transesterification of vinyl acetate is proposed. The reaction of vinyl acetate with the hydroxyl groups of cellulose nanowhiskers obtained from cotton linters was examined with potassium carbonate as catalyst. Results indicate that during the first stage of the reaction, only the surface of the nanowhiskers was modified, while their dimensions and crystallinity remained unchanged. With increasing reaction time, diffusion mechanisms controlled the rate, leading to nanowhiskers with higher levels of acetylation, smaller dimensions, and lower crystallinity. In THF, a solvent of low polarity, the suspensions from modified nanowhiskers showed improved stability with increased acetylation.

Dates et versions

hal-00945037 , version 1 (11-02-2014)

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Citer

Nihat Sami Cetin, Philippe Tingaut, Nilguel Özmen, Nathan Henry, David Harper, et al.. Acetylation of Cellulose Nanowhiskers with Vinyl Acetate under Moderate Conditions. Macromolecular Bioscience, 2009, 9 (10), pp.997-1003. ⟨10.1002/mabi.200900073⟩. ⟨hal-00945037⟩

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