Cellulose nanoribbons obtained from bacterial fermentation have been esterified by means
of a solventless organocatalytic route. The esterification methodology involves acetic anhydride as
acylant and three different α-hydroxy acids were tested as organocatalysts. By tuning the acetylation interval, bacterial
nanocellulose (BNC) with varying degree of substitution could be obtained (i.e. DS=0.27-0.90). Esterified BNC has been
characterized in terms of its morphology, chemical structure, crystallinity, wettability and dispersibility in different solvents.
The results indicate the efficacy of the present methodology for the smooth acetylation of cellulose nanoribbons at
moderate conditions, thereby expanding the role of organocatalysts in reducing the hydrophilicity of bacterial cellulose
Keywords: Acetylation, bacterial nanocellulose, organocatalysis, -hydroxy acids.
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