Naturally occurring α-hydroxy acids: Useful organocatalysts for the acetylation of cellulose nanofibres

Jhon A.Ávila Ramírez, Catalina Gómez Hoyos, Silvana Arroyo, Patricia Cerrutti, María L. Foresti

    Research output: Contribution to journalArticlepeer-review

    7 Scopus citations

    Abstract

    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 nanoribbons.

    Original languageEnglish
    Pages (from-to)161-168
    Number of pages8
    JournalCurrent Organocatalysis
    Volume3
    Issue number2
    DOIs
    StatePublished - 2016

    Bibliographical note

    Funding Information:
    Authors acknowledge Consejo Nacional de Investiga-ciones Científicas y Técnicas (CONICET-PIP 1122011010 0608), University of Buenos Aires (UBACYT 2002009010 0065), and Agencia Nacional de Promoción Científica y Tecnológica for financial support (PICT 1957 2012 – PRESTAMO BID).

    Publisher Copyright:
    © 2016 Bentham Science Publishers.

    Keywords

    • Acetylation
    • Bacterial nanocellulose
    • Organocatalysis
    • α-hydroxy acids

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