Assembling Native Elementary Cellulose Nanofibrils via a Reversible and Regioselective Surface Functionalization
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2021-10-20
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en
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17040–17046
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Journal of the American Chemical Society, Volume 143, issue 41
Abstract
Selective surface modification of biobased fibers affords effective individualization and functionalization into nanomaterials, as exemplified by the TEMPO-mediated oxidation. However, such a route leads to changes of the native surface chemistry, affecting interparticle interactions and limiting the development of potential supermaterials. Here we introduce a methodology to extract elementary cellulose fibrils by treatment of biomass with N-succinylimidazole, achieving regioselective surface modification of C6-OH, which can be reverted using mild post-treatments. No polymer degradation, cross-linking, nor changes in crystallinity occur under the mild processing conditions, yielding cellulose nanofibrils bearing carboxyl moieties, which can be removed by saponification. The latter offers a significant opportunity in the reconstitution of the chemical and structural interfaces associated with the native states. Consequently, 3D structuring of native elementary cellulose nanofibrils is made possible with the same supramolecular features as the biosynthesized fibers, which is required to unlock the full potential of cellulose as a sustainable building block.Description
| openaire: EC/H2020/788489/EU//BioELCell Funding Information: We thank Dr. Markus Bacher for his support with NMR measurements. This work was performed in part at the Materials Characterization and Fabrication Platform at The University of Melbourne. The authors thank the financial support from the Austrian Biorefinery Centre Tulln (ABCT), the Academy of Finland (Project #311255, “WTF-Click-Nano”), and the H2020-ERC-2017-Advanced Grant “BioELCell” (788489). This research was funded in whole, or in part, by the Austrian Science Fund (FWF) (J4356). Publisher Copyright: © 2021 American Chemical Society. All rights reserved.
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Beaumont, M, Tardy, B L, Reyes, G, Koso, T V, Schaubmayr, E, Jusner, P, King, A W T, Dagastine, R R, Potthast, A, Rojas, O J & Rosenau, T 2021, ' Assembling Native Elementary Cellulose Nanofibrils via a Reversible and Regioselective Surface Functionalization ', Journal of the American Chemical Society, vol. 143, no. 41, pp. 17040–17046 . https://doi.org/10.1021/jacs.1c06502