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

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
Article number8029
Pages (from-to)8029–8035
Number of pages7
JournalGreen Chemistry
Volume24
Issue number20
DOIs
Publication statusPublished - 21 Oct 2022
MoE publication typeA1 Journal article-refereed

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