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Published in: Cellulose 16/2021

24-09-2021 | Original Research

A theoretical and experimental study of oil wicking behavior via “green” superabsorbent

Authors: Huimin Zhang, Guangbiao Xu, Fumei Wang, Siheng Su, Jilong Wang, Hua Shen

Published in: Cellulose | Issue 16/2021

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Abstract

Properties of cellulose aerogels indicate their great potential in oil pollutant treatment, a domain that has received tremendous attention recently; however, there are only a small theoretical studies into their absorption mechanisms. Herein, we developed a dual-scale oil absorption model based on the Washburn capillary theory to investigate the oil absorption kinetics of aerogels. It was found that kapok/microfibrillated cellulose aerogels (KCAs) exhibit high oil absorption performance via a capillary wicking method that simulates oil removal by aerogels in polluted oceans. This theoretical model demonstrates that the oil absorption capacity is mainly derived from the continuous primary pores within the aerogel skeleton, while secondary pores introduced by chopped kapok could collect and conduct oil, leading to improved oil absorption rates of KCAs. The experimental results of the oil absorption coefficients confirm the accuracy of the developed dual-scale model. The study of this dual-scale model is significant in investigating the relationship between the pore structure and oil absorption of aerogels, which will provide valuable insights for the practical application of aerogels for oil removal in polluted oceans.

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Appendix
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Literature
go back to reference Mao N, Russell SJ (2008) Capillary pressure and liquid wicking in three-dimensional nonwoven materials. J Appl Phys 104(3):034911CrossRef Mao N, Russell SJ (2008) Capillary pressure and liquid wicking in three-dimensional nonwoven materials. J Appl Phys 104(3):034911CrossRef
go back to reference Wang S, Peng XW, Zhong LX, Tan JW, Jing SS, Cao XF, Sun RC (2015) An ultralight, elastic, cost-effective, and highly recyclable superabsorbent from microfibrillated cellulose fibers for oil spillage cleanup. J Mater Chem A 3(16):8772–8781. https://doi.org/10.1039/c4ta07057gCrossRef Wang S, Peng XW, Zhong LX, Tan JW, Jing SS, Cao XF, Sun RC (2015) An ultralight, elastic, cost-effective, and highly recyclable superabsorbent from microfibrillated cellulose fibers for oil spillage cleanup. J Mater Chem A 3(16):8772–8781. https://​doi.​org/​10.​1039/​c4ta07057gCrossRef
Metadata
Title
A theoretical and experimental study of oil wicking behavior via “green” superabsorbent
Authors
Huimin Zhang
Guangbiao Xu
Fumei Wang
Siheng Su
Jilong Wang
Hua Shen
Publication date
24-09-2021
Publisher
Springer Netherlands
Published in
Cellulose / Issue 16/2021
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-021-04218-6

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