Superhydrophobic surfaces with fluorinated cellulose nanofiber assemblies for oil–water separation

Fluorinated cellulose nanofiber assemblies exhibit high oil–water separation efficiency and recyclability (at least 50 times) for practical applications.

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Dodecyl Mercaptan Functionalized Copper Mesh for Water Repellence and Oil-water Separation

Journal of Bionic Engineering ◽

10.1007/s42235-021-0062-7 ◽

2021 ◽

Vol 18 (4) ◽

pp. 887-899

Author(s):

Yanling Tian ◽

Jiekai Feng ◽

Zexin Cai ◽

Jiaqi Chao ◽

Dawei Zhang ◽

...

Keyword(s):

Separation Efficiency ◽

Synthesis Process ◽

Water Separation ◽

Oil Water Separation ◽

One Step ◽

Oil Water ◽

Water Repellence ◽

Copper Mesh ◽

Dodecyl Mercaptan

AbstractReckless discharge of industrial wastewater and domestic sewage as well as frequent leakage of crude oil have caused serious environmental problems and posed severe threat to human survival. Various nature inspired superhy-drophobic surfaces have been successfully applied in oily water remediation. However, further improvements are still urgently needed for practical application in terms of facile synthesis process and long-term durability towards harsh environment. Herein, we propose a simple one-step dodecyl mercaptan functionalization method to fabricate Super-hydrophobic-Superoleophilic Copper Mesh (SSCM). The prepared SSCM possesses excellent water repellence and oil affinity, enabling it to successfully separate various oil-water mixtures with high separation efficiency (e.g., > 99% for hexadecane-water mixture). The SSCM retains high separating ability when hot water and strong corrosive aqueous solutions are used to simulate oil-water mixtures, indicating remarkable chemical durability of the dodecyl mercaptan functionalized copper mesh. Additionally, the efficiency can be well maintained during 50 cycles of separation, and the water repellence is even stable after storage in air for 120 days, demonstrating the reusability and long-term stability of the SSCM. Furthermore, the functionalized mesh also shows good mechanical robustness towards abrasion by sandpaper, and oil-water separation efficiency of > 96% can be obtained after 10 cycles of abrasion. The reported one-step dodecyl mercaptan functionalization could be a simple method for increasing the water repellence of copper mesh, and thereby be a great candidate for treating large-scale oily wastewater in harsh environments.

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Spray deposition process to fabricate Cu2O superhydrophobic surfaces on brass mesh for efficient oil-water separation

Materials Letters ◽

10.1016/j.matlet.2017.08.105 ◽

2018 ◽

Vol 210 ◽

pp. 97-100 ◽

Cited By ~ 6

Author(s):

Lei Niu ◽

Zhixin Kang

Keyword(s):

Spray Deposition ◽

Deposition Process ◽

Superhydrophobic Surfaces ◽

Water Separation ◽

Oil Water Separation ◽

Oil Water

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Synthesis and Characterization of Highly Efficient Oil-Water Separation, Recyclable, Magnetic Particles CoFe2O4/SDB

10.21203/rs.3.rs-601296/v1 ◽

2021 ◽

Author(s):

Cailin Liu ◽

Li Yu ◽

Yue Fan ◽

Chang Li ◽

Xianyan Ren ◽

...

Keyword(s):

Adsorption Capacity ◽

Magnetic Particles ◽

In Situ Polymerization ◽

Solid Phase ◽

Sol Gel ◽

Water Separation ◽

Practical Applications ◽

Oil Water Separation ◽

Oil Water

Abstract In the oil-water separation, the difficulty to recover and low hydrophobicity are key limitation factors for practical applications. In this paper, we design Cobalt ferrite hybird Polystyrene divinylbenzene microspheres (CoFe2O4/SDB), which were conducted through in-situ suspension copolymerization. The CoFe2O4 is prepared by low heat solid phase sol-gel method. It had been found that the CoFe2O4/SDB have a spherical structure, good adsorption behavior, highly hydrophobicity and even superhydrophobicity. The adsorption capacity of CoFe2O4/SDB composites could absorb kerosene up to 6 times of its own weight. Interestingly, kerosene can be easily separated from the surface of CoFe2O4/SDB particles with ultrasonic operation. CoFe2O4/SDB particles can still maintain good hydrophobicity and adsorption capacity of kerosene after 11 cycles after drying. With in situ polymerization of St、DVB and CoFe2O4, CoFe2O4/SDB as a promising absorbent of kerosene which has great potential in application of oil-water separation.

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Fabrication of cellulose nanofiber-deposited cellulose sponge as an oil-water separation membrane

Separation and Purification Technology ◽

10.1016/j.seppur.2019.05.005 ◽

2019 ◽

Vol 224 ◽

pp. 322-331 ◽

Cited By ~ 11

Author(s):

Abdul Halim ◽

Yinchao Xu ◽

Kuan-Hsuan Lin ◽

Motoyoshi Kobayashi ◽

Mikio Kajiyama ◽

...

Keyword(s):

Cellulose Nanofiber ◽

Water Separation ◽

Cellulose Sponge ◽

Separation Membrane ◽

Oil Water Separation ◽

Oil Water

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Fabricated of Superhydrophobic Silanized Melamine Sponge with Photochromic Properties for Efficiency Oil/Water Separation

Advances in Polymer Technology ◽

10.1155/2019/9536320 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8 ◽

Cited By ~ 2

Author(s):

Peng Hong ◽

Zhu Liu ◽

Yang Gao ◽

Yubin Chen ◽

Mingxun Zhuang ◽

...

Keyword(s):

Large Scale ◽

Separation Efficiency ◽

Low Cost ◽

Water Repellency ◽

Dip Coating ◽

Absorption Capacity ◽

Photochromic Properties ◽

Water Separation ◽

Oil Water Separation ◽

Oil Water

Superhydrophobic sponge as potential absorbing material for oil/water separation is attracting great attention recently. However, there are still some challenges to feasibly fabricate superhydrophobic sponge with large scale and low cost. Herein, a novel photochromic superhydrophobic melamine sponge (PDMS-SP sponge) is fabricated by facilely dip-coating and thermocuring of hydroxyl-terminated polydimethylsiloxanes mixed with photochromic spiropyran. FT-IR, EDS, and XPS results confirm the successful coating of PDMS-SP upon melamine sponge. The resultant sponge not only possesses excellent water repellency with a contact angle of 154.5° and oil-water separation efficiency with an oil absorption capacity of 48–116 folds of itself weight, but also shows photochromic phenomenon between colorless and purple when it is successively exposed to UV irradiation and visible light.

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PP/TiO2 Melt-Blown Membranes for Oil/Water Separation and Photocatalysis: Manufacturing Techniques and Property Evaluations

Polymers ◽

10.3390/polym11050775 ◽

2019 ◽

Vol 11 (5) ◽

pp. 775 ◽

Cited By ~ 10

Author(s):

Fei Sun ◽

Ting-Ting Li ◽

Haitao Ren ◽

Qian Jiang ◽

Hao-Kai Peng ◽

...

Keyword(s):

Separation Efficiency ◽

Decomposition Temperature ◽

Particle Dispersion ◽

Tio2 Content ◽

Scanning Calorimetry ◽

Water Separation ◽

Photocatalytic Effect ◽

Oil Water Separation ◽

Oil Water ◽

Manufacturing Techniques

This study aims to produce polypropylene (PP)/titanium dioxide (TiO2) melt-blown membranes for oil/water separation and photocatalysis. PP and different contents of TiO2 are melt-blended to prepare master batches using a single screw extruder. The master batches are then fabricated into PP/TiO2 melt-blown membranes. The thermal properties of the master batches are analyzed using differential scanning calorimetry and thermogravimetric analysis, and their particle dispersion and melt-blown membrane morphology are evaluated by scanning electron microscopy. TiO2 loaded on melt-blown membranes is confirmed by X-ray diffraction (XRD). The oil/water separation ability of the melt-blown membranes is evaluated to examine the influence of TiO2 content. Results show that the thermal stability and photocatalytic effect of the membranes increase with TiO2 content. TiO2 shows a good dispersion in the PP membranes. After 3 wt.% TiO2 addition, crystallinity increases by 6.4%, thermal decomposition temperature increases by 25 °C compared with pure PP membranes. The resultant PP/TiO2 melt-blown membrane has a good morphology, and better hydrophobicity even in acetone solution or 6 h ultraviolet irradiation, and a high oil flux of about 15,000 L·m−2·h−1. Moreover, the membranes have stabilized oil/water separation efficiency after being repeatedly used. The proposed melt-blown membranes are suitable for mass production for separating oil from water in massively industrial dyeing wastewater.

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Facile Fabrication of Magnetic, Durable and Superhydrophobic Cotton for Efficient Oil/Water Separation

Polymers ◽

10.3390/polym11030442 ◽

2019 ◽

Vol 11 (3) ◽

pp. 442 ◽

Cited By ~ 4

Author(s):

Mingguang Yu ◽

Qing Wang ◽

Wenxin Yang ◽

Yonghang Xu ◽

Min Zhang ◽

...

Keyword(s):

Separation Efficiency ◽

Water Repellency ◽

Cotton Fabrics ◽

Ammonia Solution ◽

Hot Water ◽

Water Contact ◽

Water Separation ◽

Efficient Strategy ◽

Oil Water Separation ◽

Oil Water

In this paper, we present a facile and efficient strategy for the fabrication of magnetic, durable, and superhydrophobic cotton for oil/water separation. The superhydrophobic cotton functionalized with Fe3O4 magnetic nanoparticles was prepared via the in situ coprecipitation of Fe2+/Fe3+ ions under ammonia solution on cotton fabrics using polyvinylpyrrolidone (PVP) as a coupling agent and hydrophobic treatment with tridecafluorooctyl triethoxysilane (FAS) in sequence. The as-prepared cotton demonstrated excellent superhydrophobicity with a water contact angle of 155.6° ± 1.2° and good magnetic responsiveness. Under the control of the external magnetic field, the cotton fabrics could be easily controlled to absorb the oil from water as oil absorbents, showing high oil/water separation efficiency, even in hot water. Moreover, the cotton demonstrated remarkable mechanical durable properties, being strongly friction-resistant against sandpaper and finger wipe, while maintaining its water repellency. This study developed a novel and efficient strategy for the construction of magnetic, durable, and superhydrophobic biomass-based adsorbent for oil/water separation, which can be easily scaled up for practical oil absorption.

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Modeling of oil–water separation efficiency in three-phase separators: Effect of emulsion rheology and droplet size distribution

Chemical Engineering Research and Design ◽

10.1016/j.cherd.2020.02.022 ◽

2020 ◽

Vol 159 ◽

pp. 278-290 ◽

Cited By ~ 2

Author(s):

Lanre M. Oshinowo ◽

Regis D. Vilagines

Keyword(s):

Size Distribution ◽

Droplet Size ◽

Separation Efficiency ◽

Droplet Size Distribution ◽

Water Separation ◽

Three Phase ◽

Oil Water Separation ◽

Oil Water ◽

Emulsion Rheology

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Scaly bionic structures constructed on a polyester fabric with anti-fouling and anti-bacterial properties for highly efficient oil–water separation

RSC Advances ◽

10.1039/c6ra19993c ◽

2016 ◽

Vol 6 (90) ◽

pp. 87332-87340 ◽

Cited By ~ 6

Author(s):

Y. W. Liu ◽

C. H. Zhang ◽

Z. Q. Wang ◽

X. Fu ◽

R. Wei

Keyword(s):

Separation Efficiency ◽

Polyester Fabric ◽

Water Separation ◽

Highly Efficient ◽

Oil Water Separation ◽

Oil Water ◽

Underwater Superoleophobicity

Scaly structure bionic structured on the fabric with superhydrophilicity and underwater superoleophobicity. The modified fabric showed excellent separation efficiency for various oil–water mixtures which could solve oil–water separation issue.

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