MWCNTs polyurethane sponges with enhanced super-hydrophobicity for selective oil–water separation

Chen, Xueqiang; Zhang, Bingjian; Xie, Lan; Wang, Fanglu

doi:10.1080/02670844.2019.1711303

Cited by 32 publications

(16 citation statements)

References 55 publications

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“…The modified carbon nanotube can absorb oil up to 180 times its weight, which is more highly efficient as compared with the commercially available absorbers for oil spill cleanup (Gui et al 2010a, b). Another group of researchers, Chen et al (2020) were introduced long-chain hexadecyl siloxane groups into hydroxylated multi-walled carbon nanotubes (MWCNTs-OH) to obtain modified carbon nanotubes (CNTs) with super-hydrophobic characteristics. They showed that super-hydrophobic/ super-oleophilic polyurethane sponge exhibited excellent super-hydrophobic properties, with a water contact angle of 157.4 ± 1.1°, and water droplets roll-off angle of only 6.7°.…”

Section: Multi-walled Carbon Nanotubes: First-hand Choice Nano-adsorbents For Oil Spill Cleanupmentioning

confidence: 99%

“…They showed that super-hydrophobic/ super-oleophilic polyurethane sponge exhibited excellent super-hydrophobic properties, with a water contact angle of 157.4 ± 1.1°, and water droplets roll-off angle of only 6.7°. Also, its mechanical strength was greatly improved by the introduction of CNTs (Chen et al 2020).…”

Section: Multi-walled Carbon Nanotubes: First-hand Choice Nano-adsorbents For Oil Spill Cleanupmentioning

confidence: 99%

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Functionalized multi-walled carbon nanotubes for oil spill cleanup from water

Abdullah

Juzsakova

Hafad

et al. 2021

Clean Techn Environ Policy

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The growing global economy resulted in an incessant increase in transportation and exploitation of oil. Hence, the oil spillage has been considered a serious threat to aquatic and terrestrial ecosystems. Therefore, water purification has been considered a major challenge around the world. There are numerous classical methods available for oil removal from water, but owing to multiple defects and disadvantages, research efforts have focused to find such adsorbents which can improve oil adsorption capability. Traditional adsorbent material typically applied in oil removal includes activated carbon, organoclays, wool, zeolites, etc. These materials suffer from several drawbacks such as low absorption capacity, non-selective absorption, and complicated reusability, whereas nano-adsorbents offer multiple advantages such as having multiple sorption sites, large surface area, short intra-particle diffusion distance, tuneable pore size, and ease of low-temperature modification. Multi-walled carbon nanotubes (MWCNTs) are extensively used adsorbent materials with a strong affinity for the removal of organic pollutants. The functionalization MWCNTs further increase the sorption capacity of adsorbents manifolds to remove organic materials. These nanocomposites are also compatible with green materials and considered environmentally friendly adsorbents. This review paper aims at providing an insight to understand the properties of the MWCNTs and their potential use to adsorb hydrocarbons from water. Moreover, the synthesis methods of those materials, their modification procedures including the functionalization with metal oxide nanoparticles, and applications are also discussed in detail. Graphic abstract

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Section: Multi-walled Carbon Nanotubes: First-hand Choice Nano-adsorbents For Oil Spill Cleanupmentioning

confidence: 99%

Section: Multi-walled Carbon Nanotubes: First-hand Choice Nano-adsorbents For Oil Spill Cleanupmentioning

confidence: 99%

Functionalized multi-walled carbon nanotubes for oil spill cleanup from water

Abdullah

Juzsakova

Hafad

et al. 2021

Clean Techn Environ Policy

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“…The nanoscale allotropes of carbon including graphene, carbon nanotubes (CNTs), fullerenes, and nanodiamonds offer a wide range of properties such as high thermal and electrical conductivity, corrosion resistance, optical, mechanical, and electrochemical properties (Zhai et al, 2017 ). The use of carbon-based nanomaterials has been extended to structural materials, electronic, sensing, biomedical, energy storage, catalysis, cardiac scaffolds, desalination, and water purification (Zhai et al, 2017 ; Chen et al, 2020 ; Liu et al, 2020 ; Zhang et al, 2020a ). Different forms of carbon have been explored to prepare materials for separation of oil/water mixtures and emulsions.…”

Section: Separation Of Oil/water Mixturesmentioning

confidence: 99%

Surface Engineering of Ceramic Nanomaterials for Separation of Oil/Water Mixtures

et al. 2020

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Oil/water mixtures are a potentially major source of environmental pollution if efficient separation technology is not employed during processing. A large volume of oil/water mixtures is produced via many manufacturing operations in food, petrochemical, mining, and metal industries and can be exposed to water sources on a regular basis. To date, several techniques are used in practice to deal with industrial oil/water mixtures and oil spills such as in situ burning of oil, bioremediation, and solidifiers, which change the physical shape of oil as a result of chemical interaction. Physical separation of oil/water mixtures is in industrial practice; however, the existing technologies to do so often require either dissipation of large amounts of energy (such as in cyclones and hydrocyclones) or large residence times or inventories of fluids (such as in decanters). Recently, materials with selective wettability have gained attention for application in separation of oil/water mixtures and surfactant stabilized emulsions. For example, a superhydrophobic material is selectively wettable toward oil while having a poor affinity for the aqueous phase; therefore, a superhydrophobic porous material can easily adsorb the oil while completely rejecting the water from an oil/water mixture, thus physically separating the two components. The ease of separation, low cost, and low-energy requirements are some of the other advantages offered by these materials over existing practices of oil/water separation. The present review aims to focus on the surface engineering aspects to achieve selectively wettability in materials and its their relationship with the separation of oil/water mixtures with particular focus on emulsions, on factors contributing to their stability, and on how wettability can be helpful in their separation. Finally, the challenges in application of superwettable materials will be highlighted, and potential solutions to improve the application of these materials will be put forward.

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“…Ag(NH 3 ) 2 + was reduced to Ag particles in situ on the wood surface by formaldehyde reduction. After that, the treated wood was modified by stearic acid with a long-chain alkyl group [ 49 ] to obtain a superhydrophobic surface with a contact angle of 158.7°. The modified surface has waterproof, fouling, and antibacterial properties, and stable superhydrophobic properties under mechanical wear cycle, acid and alkali solution, ultraviolet light, and different temperatures of heat treatment.…”

Section: Introductionmentioning

confidence: 99%

A Superhydrophobic, Antibacterial, and Durable Surface of Poplar Wood

Yang

Gan

et al. 2021

Nanomaterials

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The silver particles were grown in situ on the surface of wood by the silver mirror method and modified with stearic acid to acquire a surface with superhydrophobic and antibacterial properties. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray energy spectroscopy (XPS) were used to analyze the reaction mechanism of the modification process. Scanning electron microscopy (SEM) and contact angle tests were used to characterize the wettability and surface morphology. A coating with a micro rough structure was successfully constructed by the modification of stearic acid, which imparted superhydrophobicity and antibacterial activity to poplar wood. The stability tests were performed to discuss the stability of its hydrophobic performance. The results showed that it has good mechanical properties, acid and alkali resistance, and UV stability. The durability tests demonstrated that the coating has the function of water resistance and fouling resistance and can maintain the stability of its hydrophobic properties under different temperatures of heat treatment.

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MWCNTs polyurethane sponges with enhanced super-hydrophobicity for selective oil–water separation

Cited by 32 publications

References 55 publications

Functionalized multi-walled carbon nanotubes for oil spill cleanup from water

Functionalized multi-walled carbon nanotubes for oil spill cleanup from water

Surface Engineering of Ceramic Nanomaterials for Separation of Oil/Water Mixtures

A Superhydrophobic, Antibacterial, and Durable Surface of Poplar Wood

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