University of Oulu

Wei, J., Geng, S., Hedlund, J. et al. Lightweight, flexible, and multifunctional anisotropic nanocellulose-based aerogels for CO2 adsorption. Cellulose 27, 2695–2707 (2020).

Lightweight, flexible, and multifunctional anisotropic nanocellulose-based aerogels for CO2 adsorption

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Author: Wei, Jiayuan1; Geng, Shiyu1; Hedlund, Jonas2;
Organizations: 1Division of Material Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology, 97 187, Luleå, Sweden
2Chemical Technology, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 97 187, Luleå, Sweden
3Fibre and Particle Engineering, University of Oulu, 90014, Oulu, Finland
4Mechanical and Industrial Engineering (MIE), University of Toronto, Toronto, ON, M5S 3G8, Canada
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.6 MB)
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Language: English
Published: Springer Nature, 2020
Publish Date: 2020-04-22


CO₂ adsorption is a promising strategy to reduce costs and energy use for CO₂ separation. In this study, we developed CO₂ adsorbents based on lightweight and flexible cellulose nanofiber aerogels with monolithic structures prepared via freeze-casting, and cellulose acetate or acetylated cellulose nanocrystals (a-CNCs) were introduced into the aerogels as functional materials using an impregnation method to provide CO₂ affinity. The microstructure of the adsorbent was examined using scanning electron microscopy, and compression tests were performed to analyze the mechanical properties of the adsorbents. The CO₂ adsorption behavior was studied by recording the adsorption isotherms and performing column breakthrough experiments. The samples showed excellent mechanical performance and had a CO₂ adsorption capacity of up to 1.14 mmol/g at 101 kPa and 273 K. Compared to the adsorbent which contains cellulose acetate, the one impregnated with a-CNCs had better CO₂ adsorption capacity and axial mechanical properties owing to the building of a nanoscale scaffold on the surface of the adsorbent. Although the CO₂ adsorption capacity could be improved further, this paper reports a potential CO₂ adsorbent that uses all cellulose-based materials, which is beneficial for the environment from both resource and function perspectives. Moreover, the interesting impregnation process provides a new method to attach functional materials to aerogels, which have potential for use in many other applications.

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Series: Cellulose
ISSN: 0969-0239
ISSN-E: 1572-882X
ISSN-L: 0969-0239
Volume: 27
Pages: 2695 - 2707
DOI: 10.1007/s10570-019-02935-7
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
221 Nanotechnology
Funding: Open access funding provided by Lulea University of Technology. The authors gratefully acknowledge Bio4Energy and Kempe stiftelserna for their financial support.
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