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
< Leer menos
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
Idioma
en
Article de revue
Este ítem está publicado en
Macromolecular Bioscience. 2009, vol. 9, n° 10, p. 997-1003
Wiley-VCH Verlag
Resumen en inglés
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 ...Leer más >
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.< Leer menos
Palabras clave en inglés
wide-angle X-ray analysis
vinyl acetate
FT-IR ATR spectroscopy
acetylation
atomic force microscopy (AFM)
cellulose nanowhiskers
(13)C CP-MAS NMR spectroscopy
Orígen
Importado de HalCentros de investigación