Cellulose dissolution and gelation in NaOH(aq) under controlled CO2 atmosphere: Supramolecular structure and flow properties

Guillermo Reyes (Corresponding Author), Alistair W.T. King, Tetyana V. Koso, Paavo A. Penttilä, Harri Kosonen, Orlando J. Rojas (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)

Abstract

We investigate the interplay between cellulose crystallization and aggregation with interfibrillar interactions, shear forces, and the local changes in the medium's acidity. The latter is affected by the CO2 chemisorbed from the surrounding atmosphere, which, combined with shear forces, explain cellulose gelation. Herein, rheology, nuclear magnetic resonance (NMR), small and wide-angle X-ray scattering (SAXS/WAXS), and focused ion beam scanning electron microscopy (FIB-SEM) are combined to unveil the fundamental factors that limit cellulose gelation and maximize its dissolution in NaOH(aq). The obtained solutions are then proposed for developing green and environmentally friendly cellulose-based materials.

Original languageEnglish
Pages (from-to)8029–8035
JournalGreen Chemistry
Volume24
Issue number20
DOIs
Publication statusPublished - 21 Oct 2022
MoE publication typeA1 Journal article-refereed

Funding

This work was supported by the FinnCERES Flagship Program. G. R. acknowledges the contribution of UPM and support of the Academy of Finland's Flagship Program under Projects No. 318890 and 318891 (Competence Center for Materials Bioeconomy, FinnCERES). G. Reyes, and O. J. Rojas are grateful for the support received from the ERC Advanced Grant Agreement No. 788489 (“BioElCell”) and The Canada Excellence Research Chair Program (CERC-2018-00006), as well as Canada Foundation for Innovation (Project Number 38623). P. A. P. thanks the Academy of Finland for funding (Grant No. 338804). A. W. T. K. and T. K. thank the Academy of Finland for funding (Grant No. 311255). The provision of facilities and technical support by Aalto University at OtaNano-Nanomicroscopy Center (Aalto-NMC) is also gratefully acknowledged.

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