One-Pot Fabrication of Hydrophobic, Superelastic, Harakeke-Derived Nanocellulose Aerogels with Excellent Shape Recovery for Oil Adsorption and Water-in-Oil Emulsion Separation

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aut.relation.articlenumber135489
aut.relation.endpage135489
aut.relation.journalInternational Journal of Biological Macromolecules
aut.relation.startpage135489
dc.contributor.authorZhai, Yitong
dc.contributor.authorYuan, Xiaowen
dc.date.accessioned2024-09-15T23:54:56Z
dc.date.available2024-09-15T23:54:56Z
dc.date.issued2024-09-10
dc.description.abstractCellulose-based aerogels have attracted significant attention for oil/water separation due to their high porosity, large specific surface area and high adsorption capacity. However, their intrinsic hydrophilicity, and inadequate mechanical properties have often limited their practical applications. Traditional freeze-dried cellulose aerogels exhibit unsatisfactory elasticity and require a separate surface modification process to adjust the surface wettability. In this study, we present a novel one-pot fabrication strategy which simultaneously achieves the crosslinking of individual cellulose nanofibers and the hydrophobic modification of the surface wettability. Following directional freeze-drying, hydrophobic, superelastic, and anisotropic cellulose-based aerogel was prepared from the 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO)-oxidized cellulose nanofibers, isolated from harakeke (New Zealand native flax). The resulting aerogel exhibits a high water contact angle of 142°, good compressive recovery performance (85 % recovery of the original height after 100 compression cycles at 70 % strain), and outstanding adsorption capacity for various types of oil and organic solvents (80-105 g/g). Furthermore, the aerogel could also be used as a filter to separate the surfactant stabilized water-in-oil emulsions with high flux (782 L m-2 h-1) and high separation efficiency (98.7-99.2 %). The novel aerogel prepared in this study is expected to have great potential for practical applications in oily wastewater remediation.
dc.identifier.citationInternational Journal of Biological Macromolecules, ISSN: 0141-8130 (Print); 1879-0003 (Online), Elsevier, 135489-135489. doi: 10.1016/j.ijbiomac.2024.135489
dc.identifier.doi10.1016/j.ijbiomac.2024.135489
dc.identifier.issn0141-8130
dc.identifier.issn1879-0003
dc.identifier.urihttp://hdl.handle.net/10292/18017
dc.languageeng
dc.publisherElsevier
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0141813024062974
dc.rightsCopyright © 2024 Elsevier Ltd. All rights reserved. This is the author’s version of a work that was accepted for publication in (see Citation). Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. The definitive version was published in (see Citation). The original publication is available at (see Publisher's Version).
dc.rights.accessrightsOpenAccess
dc.subjectCellulose aerogel
dc.subjectFiltration
dc.subjectHarakeke
dc.subjectOil adsorption
dc.subjectSuperelastic
dc.subjectCellulose aerogel
dc.subjectFiltration
dc.subjectHarakeke
dc.subjectOil adsorption
dc.subjectSuperelastic
dc.subject0601 Biochemistry and Cell Biology
dc.subjectPolymers
dc.subject3101 Biochemistry and cell biology
dc.titleOne-Pot Fabrication of Hydrophobic, Superelastic, Harakeke-Derived Nanocellulose Aerogels with Excellent Shape Recovery for Oil Adsorption and Water-in-Oil Emulsion Separation
dc.typeJournal Article
pubs.elements-id568614
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