Tert-Butanol as a Structuring Agent for Cellulose Nanocrystal Fluids and Foams

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date

2025-09-08

Department

Department of Bioproducts and Biosystems

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Language

en

Pages

10

Series

Biomacromolecules, Volume 26, issue 9, pp. 5591-5600

Abstract

Nanocelluloses are uniquely valued for their high surface area and controllable assembly. This study elucidates the assembly of cellulose nanocrystals (CNCs) in tert-butanol (TBA) and water mixtures. We emphasize the influence of TBA on the structure of suspensions and freeze-dried foams. Although the length-scale of CNC organization is large relative to water-TBA structures, adding more than 30 wt % TBA shifted ordered CNC packing into an isotropic network. The change was attributed to the disruption of ionic interactions and adsorption of TBA to hydrophobic CNC interfaces; manifesting as a 5-fold increase in viscosity at 50 wt % TBA content. The freeze-dried foams’ morphology was transformed due to TBA-modulated crystal growth during the freezing process. This led to the intriguing capability to control foams’ mechanical strength and surface area, achieving up to 3 and 15-fold increases, respectively. The investigations highlight TBA’s potential as a structuring agent in solvent-mediated design of nanomaterial systems.

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Publisher Copyright: © 2025 The Authors. Published by American Chemical Society

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DOI

10.1021/acs.biomac.5c00184

Citation

Llácer Navarro, S, Orzan, E, Janewithayapun, R, Penttilä, P, Andersson, J, Ström, A, Kádár, R & Nypelö, T 2025, 'Tert-Butanol as a Structuring Agent for Cellulose Nanocrystal Fluids and Foams', Biomacromolecules, vol. 26, no. 9, pp. 5591-5600. https://doi.org/10.1021/acs.biomac.5c00184

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https://urn.fi/URN:NBN:fi:aalto-202510228472

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[article-cris] Kemian tekniikan korkeakoulu / CHEM