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Membrane applications for the separation of surfactant-stabilized emulsions are often constrained by a deficiency in permeability and anti-fouling properties. Herein, special wetted cotton fabric with a protective layer ([email protected]) for durable anti-fouling performance was designed by a two-step method, which was related to interfacial ion migration technology and unilateral spraying treatment. In detail, the immobilization of magnesium hydroxide caused the formation of the rough micro/nano structure of the cotton fabric surface. The stearic acid acted as a protective layer, like a quilt, protecting the membrane from contamination. Permeability of water and separation performance of [email protected] membrane were investigated systematically. For emulsion stabilized by SDS (SDS/Oil/H2O), the separation flux driven by gravity was approximately 500 L m -2 h -1 , and all separation efficiencies were over 99.3 %. CTAB/Oil/H2O emulsion and the Tween-60/Oil/H2O emulsion also could be successfully separated with high separation efficiency and separation flux. During the whole separation process, the oil droplets surrounded by surfactants were difficult to demulsify and gathered physically on the surface of the fabric to form a "creamy layer", which could be cleaned off so that the [email protected] membrane was not contaminated. In addition, the [email protected] membrane exhibited robust reusability for separation, which was promising for the remediation of oily wastewater containing surfactants.
Keywords
Cotton fabric, protective layer, water permeability, emulsion separation
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This is a list of supplementary files associated with this preprint. Click to download.
- Graphicalabstract.png
Graphical Abstract
- sheme1.png
Scheme 1. Schematic diagram of the preparation of [email protected] membrane via interfacial ion migration technology and unilateral spraying treatment.
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CURRENT STATUS: Under Review
Version 1
Posted 29 Oct, 2021
No community comments so far
Reviews received
Received 27 Oct, 2021
Reviewers invited
Invitations sent on 27 Oct, 2021
First submitted
On 05 Oct, 2021
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Subject Areas
Polymer Science
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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
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 29 Oct, 2021
No community comments so far
Reviews received
Received 27 Oct, 2021
Reviewers invited
Invitations sent on 27 Oct, 2021
First submitted
On 05 Oct, 2021
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Polymer Science
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Membrane applications for the separation of surfactant-stabilized emulsions are often constrained by a deficiency in permeability and anti-fouling properties. Herein, special wetted cotton fabric with a protective layer ([email protected]) for durable anti-fouling performance was designed by a two-step method, which was related to interfacial ion migration technology and unilateral spraying treatment. In detail, the immobilization of magnesium hydroxide caused the formation of the rough micro/nano structure of the cotton fabric surface. The stearic acid acted as a protective layer, like a quilt, protecting the membrane from contamination. Permeability of water and separation performance of [email protected] membrane were investigated systematically. For emulsion stabilized by SDS (SDS/Oil/H2O), the separation flux driven by gravity was approximately 500 L m -2 h -1 , and all separation efficiencies were over 99.3 %. CTAB/Oil/H2O emulsion and the Tween-60/Oil/H2O emulsion also could be successfully separated with high separation efficiency and separation flux. During the whole separation process, the oil droplets surrounded by surfactants were difficult to demulsify and gathered physically on the surface of the fabric to form a "creamy layer", which could be cleaned off so that the [email protected] membrane was not contaminated. In addition, the [email protected] membrane exhibited robust reusability for separation, which was promising for the remediation of oily wastewater containing surfactants.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
This is a list of supplementary files associated with this preprint. Click to download.
- Graphicalabstract.png
Graphical Abstract
- sheme1.png
Scheme 1. Schematic diagram of the preparation of [email protected] membrane via interfacial ion migration technology and unilateral spraying treatment.
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