Acetylation of Cellulose Nanowhiskers with Vinyl Acetate under Moderate Conditions
TINGAUT, Philippe
Swiss Federal Laboratories for Materials Science and Technology [Dübendorf] [EMPA]
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Swiss Federal Laboratories for Materials Science and Technology [Dübendorf] [EMPA]
TINGAUT, Philippe
Swiss Federal Laboratories for Materials Science and Technology [Dübendorf] [EMPA]
Swiss Federal Laboratories for Materials Science and Technology [Dübendorf] [EMPA]
SÈBE, Gilles
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
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Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
Langue
en
Article de revue
Ce document a été publié dans
Macromolecular Bioscience. 2009, vol. 9, n° 10, p. 997-1003
Wiley-VCH Verlag
Résumé en anglais
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 ...Lire la suite >
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.< Réduire
Mots clés en anglais
wide-angle X-ray analysis
vinyl acetate
FT-IR ATR spectroscopy
acetylation
atomic force microscopy (AFM)
cellulose nanowhiskers
(13)C CP-MAS NMR spectroscopy
Origine
Importé de halUnités de recherche