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Research Article
Lei Dai
Shaanxi University of Science and Technology
Corresponding Author
ORCiD: https://orcid.org/0000-0002-9011-2246
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Volatile organic compounds (VOCs) are hazardous to the environment and human health. Thus, tremendous effort has gone into developing effective/efficient techniques for VOCs separation from their aqueous mixtures. In this work, a simple and versatile strategy was proposed to fabricate a new material for hydrophobic volatile organic compounds (VOCs) separation, in which a self-assembling hydrogel consisting of TEMPO-oxidized cellulose nanofibers (TOCN) and cationic guar gum (CGG) was used. Specifically, TOCN and CGG were deposited onto a filter paper via a layer-by-layer procedure, resulting in a TOCN/CGG hydrogel-coated filtering material, in which no crosslinking agent was used. The hydrogel is spontaneously formed by electrostatic interactions and hydrogen bonding. The as-prepared filtering material exhibits oil-repellence and underwater oleophobicity resulting from the formation of hydration layer on hydrogel, thus demonstrating good VOCs separation performance. One-layer of TOCN/CGG hydrogel coating (dried mass of 0.032 g·m-2) was proved to realize the VOCs separation (separation efficiency of around 99% and water flux of as high as 905.14 L·m-2·h-1). Further increase of the hydrogel layers has negligible influence on the separation efficiency although it decreases the water flux. This filtering material also exhibits good stability during recycling. Consequently, this TOCN/CGG self-assembling hydrogel-coated filtering material has great potential in VOCs-contaminated wastewater treatment.
Keywords
cellulose nanofibers, cationic guar gum, self-assembling, hydrogel, volatile organic compounds (VOCs).
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A new preprint design is coming!
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This preprint is under consideration at Cellulose. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research Article
Lei Dai
Shaanxi University of Science and Technology
Corresponding Author
ORCiD: https://orcid.org/0000-0002-9011-2246
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Review
Version 1
Posted 10 Feb, 2021
No community comments so far
Reviews received
Received 10 Feb, 2021
Reviewers invited
Invitations sent on 07 Feb, 2021
First submitted
On 21 Jan, 2021
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Volatile organic compounds (VOCs) are hazardous to the environment and human health. Thus, tremendous effort has gone into developing effective/efficient techniques for VOCs separation from their aqueous mixtures. In this work, a simple and versatile strategy was proposed to fabricate a new material for hydrophobic volatile organic compounds (VOCs) separation, in which a self-assembling hydrogel consisting of TEMPO-oxidized cellulose nanofibers (TOCN) and cationic guar gum (CGG) was used. Specifically, TOCN and CGG were deposited onto a filter paper via a layer-by-layer procedure, resulting in a TOCN/CGG hydrogel-coated filtering material, in which no crosslinking agent was used. The hydrogel is spontaneously formed by electrostatic interactions and hydrogen bonding. The as-prepared filtering material exhibits oil-repellence and underwater oleophobicity resulting from the formation of hydration layer on hydrogel, thus demonstrating good VOCs separation performance. One-layer of TOCN/CGG hydrogel coating (dried mass of 0.032 g·m-2) was proved to realize the VOCs separation (separation efficiency of around 99% and water flux of as high as 905.14 L·m-2·h-1). Further increase of the hydrogel layers has negligible influence on the separation efficiency although it decreases the water flux. This filtering material also exhibits good stability during recycling. Consequently, this TOCN/CGG self-assembling hydrogel-coated filtering material has great potential in VOCs-contaminated wastewater treatment.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
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