Photothermally induced <i>in situ</i> double emulsion separation by a carbon nanotube/poly(<i>N</i>-isopropylacrylamide) modified membrane with superwetting properties

Qu, Ruixiang; Li, Xiangyu; Zhang, Weifeng; Liu, Yanan; Zhai, Huajun; Wei, Yen; Feng, Lin

doi:10.1039/d0ta02919j

Cited by 30 publications

(10 citation statements)

References 42 publications

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“…Especially, carbon-based membranes, involving carbon nanotubes (CNTs) and graphene oxide (GO), have gained considerable attention in the field of science to explore their transport behavior and purification mechanism. − For one thing, the CNTs or GO has a large surface area and hydrophilic characteristics, making them ideal options to contact water-soluble contaminations efficiently. − For another, a continuous structure can be designed through covalent/noncovalent cross-linking or interfacial self-assembly, which is beneficial to capture the target substances. − Until now, plenty of exciting achievements about carbon-based separation membranes have emerged endlessly. Generally speaking, these membranes are divided into four parts, superhydrophobic carbon-based membranes, superhydrophilic carbon-based membranes, Janus carbon-based membranes, and smart carbon-based membranes. − These membranes play irreplaceable roles in the field of oil/water purification.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in Superhydrophilic Carbon-Based Composite Membranes for Oil/Water Emulsion Separation

Xiao

et al. 2021

ACS Appl. Mater. Interfaces

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The purification of stabilized oil/water emulsions is essential to meet the ever increasing demand for monitoring water in the environment, which has been addressed with superwetting carbon-based separation membranes. These include superhydrophilic carbon-based membranes whose progress in recent years and perspectives are reviewed in this paper. The membrane construction strategy is organized into four parts, vacuum-assisted self-assembly, sol–gel process, electrospinning, and vacuum-assisted filtration. In each section, the design strategies and their responding disadvantages have been comprehensively discussed. The challenges and prospects concerning the superhydrophilic carbon-based separation membranes for oily wastewater purification are also summarized to arouse researchers to carry out more studies.

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Section: Introductionmentioning

confidence: 99%

Recent Progress in Superhydrophilic Carbon-Based Composite Membranes for Oil/Water Emulsion Separation

Xiao

et al. 2021

ACS Appl. Mater. Interfaces

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“…Currently, physical sorption by oil sorbents is considered one of the most effective methods for removing and collecting oils from water without such disadvantages . This process involves the selective adsorption of oil and repellency of water using materials with special wettability, that is, materials with simultaneous superhydrophobic (water contact angle >150°) and superoleophilic (oil contact angle <5°) characteristics. ,− The preferred method of fabricating oil sorbents is to modify the surface of a porous three-dimensional matrix by coating it with superhydrophobic/superoleophilic materials . In addition to being an efficient and relatively low-cost process, this method can be used to treat large areas in a simple manner.…”

Section: Introductionmentioning

confidence: 99%

Flexible, Elastic, and Superhydrophobic/Superoleophilic Adhesive for Reusable and Durable Water/Oil Separation Coating

Lim

Ryu

Sohn

et al. 2022

ACS Appl. Mater. Interfaces

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This study investigates a highly flexible/stretchable and mechanically durable superhydrophobic/superoleophilic coating for efficient oil/water separation and oil absorption. The coating is applied via a simple immersion process using a mixed solution of a biocompatible adhesive (ethyl cyanoacrylate, ECA), a highly stretchable polymer (polycaprolactone, PCL), and superhydrophobic/superoleophilic nanoparticles (fluorine-coated silica nanoparticles, F-SiO 2 NPs) in a solvent, followed by solvent evaporation and ECA polymerization. Polymerized ECA (poly-ECA) in the coating material strongly adheres the F-SiO 2 NPs to the substrate surface, while PCL bestows the rigid poly-ECA with high flexibility. A coated polyurethane sponge exhibits superhydrophobicity (water contact angle of >150°), while retaining robust mechanical stability and flexibility/elasticity. This provides an efficient means of cleaning oil spills with high selectivity, even after mechanical abrasion (>99% separation efficiency is retained after 120 tape test cycles and 50 rubbing test cycles), with excellent reusability.

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“…The tunable micro/nanostructures that can respond to electric, − thermal, , chemical, , or magnetic − stimuli broaden the technique of droplet transport. As a result of the advantage of remote controllability and instantaneous response, the magnetic field is considered to have great potential to actuate the surface morphology .…”

Section: Introductionmentioning

confidence: 99%

Simple but Efficient Method To Transport Droplets on Arbitrarily Controllable Paths

Liu

Peng

et al. 2022

Langmuir

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The flexible manipulation of droplets manifests a wide spectrum of applications, such as micro-flow control, drug-targeted therapy, and microelectromechanical system heat dissipation. How to realize the efficient control of droplets has become a problem of concern. In this paper, a simple method that can realize the transport of droplets along any controllable path is proposed. It not only has a simple preparation process and clear transport mechanism but is also easy to realize in manipulation technology. A magnetic-sensitive surface is prepared by filling a polymer matrix with magnetic particles and immersing in a lubricant. Under the action of an external magnetic field, rough microstructures are generated locally on the surface, forming the wettability gradient with the area far away from the field. Moving the magnetic field, the wettability gradient region moves accordingly and drives droplets to transport. To better control the transport path of droplets or realize a more complex path design, a ring-shaped magnetic field is further adopted, during which the droplet is automatically located in the ring-shaped region and moves with the movement of the ring-shaped magnetic field. The present technique is simple and easy to implement, which should be helpful in the field of precise regulation of the droplet position.

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Photothermally induced in situ double emulsion separation by a carbon nanotube/poly(N-isopropylacrylamide) modified membrane with superwetting properties

Abstract: In situ double emulsion separation was realized using a photothermal responsive carbon nanotube/poly(N-isopropylacrylamide) coated poly(vinylidene fluoride) membrane.

Cited by 30 publications

References 42 publications

Recent Progress in Superhydrophilic Carbon-Based Composite Membranes for Oil/Water Emulsion Separation

Recent Progress in Superhydrophilic Carbon-Based Composite Membranes for Oil/Water Emulsion Separation

Flexible, Elastic, and Superhydrophobic/Superoleophilic Adhesive for Reusable and Durable Water/Oil Separation Coating

Simple but Efficient Method To Transport Droplets on Arbitrarily Controllable Paths

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