Acetylation of bacterial cellulose catalyzed by citric acid: Use of reaction conditions for tailoring the esterification extent

Jhon Alejandro Ávila Ramírez, Catalina Gómez Hoyos, Silvana Arroyo, Patricia Cerrutti, María Laura Foresti

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52 Citas (Scopus)

Resumen

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.

Idioma originalInglés
Páginas (desde-hasta)686-695
Número de páginas10
PublicaciónCarbohydrate Polymers
Volumen153
DOI
EstadoPublicada - 20 nov. 2016

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Publisher Copyright:
© 2016 Elsevier Ltd

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