Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7785291 | Carbohydrate Polymers | 2016 | 10 Pages |
Abstract
Bacterial cellulose (BC) nanoribbons were partially acetylated by a simple direct solvent-free route catalyzed by citric acid. The assay of reaction conditions within chosen intervals (i.e. esterification time (0.5-7 h), catalyst content (0.08-1.01 mmol/mmol AGU), and temperature (90-140 °C)), illustrated the flexibility of the methodology proposed, with reaction variables which can be conveniently manipulated to acetylate BC to the required degree of substitution (DS) within the 0.20-0.73 interval. Within this DS interval, characterization results indicated a surface-only process in which acetylated bacterial cellulose with tunable DS, preserved fibrous structure and increased hydrophobicity could be easily obtained. The feasibility of reusing the catalyst/excess acylant in view of potential scale-up was also illustrated.
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Authors
Jhon Alejandro Ávila RamÃrez, Catalina Gómez Hoyos, Silvana Arroyo, Patricia Cerrutti, MarÃa Laura Foresti,