University of Oulu

Karzar Jeddi, M., Laitinen, O., Liimatainen, H. (2019) Magnetic superabsorbents based on nanocellulose aerobeads for selective removal of oils and organic solvents. Materials & design, 183, 108115. doi:10.1016/j.matdes.2019.108115

Magnetic superabsorbents based on nanocellulose aerobeads for selective removal of oils and organic solvents

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Author: Karzarjeddi, Mohammad1,2; Laitinen, Ossi1; Liimatainen, Henrikki1
Organizations: 1Fibre and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, Oulu FI-90014, Finland
2Department of Chemistry, Faculty of Science, Azarbaijan Shahid Madani University, P.O. Box 53714-161, Tabriz, Iran
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.6 MB)
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Language: English
Published: Elsevier, 2019
Publish Date: 2019-10-10


Superabsorbent aerogels are fascinating materials for oil and chemical spillage cleanup. However, the development of an economic and efficient superabsorbent is still highly challenging. In this study, we introduce a novel approach to prepare very low density (0.005 g/cm3), highly porous (>99.6%), economic, reusable, hydrophobic, and magnetic spherical cellulose nanofiber-derived aerogels (i.e., aerobeads) prepared from waste boxboards via a simple freeze-drying procedure. The spherical aerobeads were fabricated easily after dropping a hydrophobized nano-fibrillated cellulose solution containing magnetic Fe3O4 nanoparticles into liquid nitrogen. The aerobeads showed outstanding absorption efficiency for several oils and organic solvents (up to 279 g/g with castor oil) and demonstrated excellent selectivity for absorbing oil from an oil/water mixture. Moreover, they were easily collected by an external magnet, indicating excellent recyclability and reusable for at least 10 cycles while still retaining supreme absorption capacity (up to 101 g/g for diesel oil). This study proposes an economic and novel method for the large-scale preparation of spherical superabsorbent aerobeads, making them a promising candidate for the efficient and sustainable cleaning of oil and chemical spills.

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Series: Materials & design
ISSN: 0264-1275
ISSN-E: 1873-4197
ISSN-L: 0264-1275
Volume: 183
Article number: 108115
DOI: 10.1016/j.matdes.2019.108115
Type of Publication: A1 Journal article – refereed
Field of Science: 215 Chemical engineering
Funding: The authors acknowledge the financial support from the Academy of Finland, project “Bionanochemicals” (No. 298295).
Academy of Finland Grant Number: 298295
Detailed Information: 298295 (Academy of Finland Funding decision)
Copyright information: © 2019 The Author(s). Published by Elsevier Ltd.This is an open access article under the CCBY-NC-ND license (