Acetylation of Cellulose Nanowhiskers with Vinyl Acetate under Moderate Conditions
- 30 September 2009
- journal article
- Published by Wiley in Macromolecular Bioscience
- Vol. 9 (10), 997-1003
- https://doi.org/10.1002/mabi.200900073
Abstract
International audienceA 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 acetylationKeywords
Funding Information
- National Science Foundation (DMR-0706323)
- U.S. Department of Energy (DEFG3605GO85014)
This publication has 37 references indexed in Scilit:
- A new process for the esterification of wood by reaction with vinyl estersCarbohydrate Polymers, 2008
- Biofibres and biocompositesCarbohydrate Polymers, 2008
- Characterization of differently sized granule fractions of yellow pea, cowpea and chickpea starches after modification with acetic anhydride and vinyl acetateCarbohydrate Polymers, 2007
- Dispersion of cellulose nanocrystals in polar organic solventsCellulose, 2006
- Properties and characterization of hydrophobized microfibrillated celluloseCellulose, 2006
- Surface Acylation of Cellulose Whiskers by Drying Aqueous EmulsionBiomacromolecules, 2006
- Optically Transparent Composites Reinforced with Networks of Bacterial NanofibersAdvanced Materials, 2005
- Review of Recent Research into Cellulosic Whiskers, Their Properties and Their Application in Nanocomposite FieldBiomacromolecules, 2005
- Surface silylation of cellulose microfibrils: preparation and rheological propertiesPolymer, 2004
- Rodlike Cellulose Microcrystals: Structure, Properties, and ApplicationsMacromolecular Rapid Communications, 2004