Radiation crosslinked magnetized wax (PE/Fe3O4) nano composite for selective oil adsorption

Ghobashy, Mohamed Mohamady; Elhady, M. A.

doi:10.1016/j.coco.2016.12.001

Cited by 34 publications

(7 citation statements)

References 18 publications

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“…With the sustained and rapid development of economies, the emergence of oil wastewater and oil-spill accidents has caused serious pollution to the environment. − Therefore, the effective separation of oil–water mixtures at low cost becomes a worldwide challenge. However, the traditional oil–water separation materials often were subjected to low separation efficiency and poor durability. − Accordingly, it is highly demanded to develop new functional materials for highly efficient oil–water separation. , In recent years, superhydrophobic surfaces, with a water contact angle exceeding 150°, have attracted worldwide attention due to their potential applications in practical oil–water separation. − Among them, cotton fibers exhibit integrated characteristics of cellulose recyclability, good mechanical properties, flexibility, and gas permeability and can be manipulated to fabricate superhydrophobic interfacial materials as an oil sorbent. , The bearing of a large amount of hydroxyl groups on the surface of cotton fibers provides numerous possibilities for further modification by adjusting the surface wettability toward superhydrophobic cotton-based composites, which is of great significance for solving the resource and environmental problems faced today.…”

Section: Introductionmentioning

confidence: 99%

“…4−6 Accordingly, it is highly demanded to develop new functional materials for highly efficient oil−water separation. 7,8 In recent years, superhydrophobic surfaces, with a water contact angle exceeding 150°, have attracted worldwide attention due to their potential applications in practical oil−water separation. 9−13 Among them, cotton fibers exhibit integrated characteristics of cellulose recyclability, good mechanical properties, flexibility, and gas permeability and can be manipulated to fabricate superhydrophobic interfacial materials as an oil sorbent.…”

Section: Introductionmentioning

confidence: 99%

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Superhydrophobic/Superoleophilic Cotton for Efficient Oil–Water Separation Based on the Combined Octadecanoyl Chain Bonding and Polymer Grafting via Surface-Initiated ATRP

Wang

Zhang

et al. 2019

ACS Appl. Polym. Mater.

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This Article reports the facile fabrication of robust and durable superhydrophobic and superoleophilic cotton for highly efficient oil–water separation based on the combination of hydrophobic octadecanoyl chain bonding and polymer grafting via surface-initiated atom transfer radical polymerization (SI-ATRP). Octadecanoyl chain-tethered and polymer-grafted superhydrophobic cotton was obtained by simultaneous treatment with stearoyl chloride and α-bromoisobutyryl bromide to generate hydrophobic cotton bearing initiating sites for ATRP (C18-Cotton-Br), followed by SI-ATRP of acrylonitrile and styrene to obtain polymer-grafted cotton (C18-Cotton-g-PSAN). The surface morphologies, chemical composition, and structural identity of the modified cotton were investigated by scanning electron microscopy (SEM), FT-IR, X-ray photoelectron spectroscopy (XPS), and the nitrogen physisorption experiments. The water contact angle (WCA), oil–water separation, oil absorption, and mechanical properties of the cotton samples were evaluated systematically. The results showed that octadecanoyl and α-bromoisobutyryl groups were successfully bonded on pristine cotton to exhibit hydrophobicity, and further polymer grafting of PSAN was realized with a high grafting density of about 0.47 nm–2. Compared with C18-Cotton-Br, after polymer grafting C18-Cotton-g-PSAN displayed enhanced superhydrophobicity with the WCA increasing from 154° to 159° due to the increased surface roughness. C18-Cotton-g-PSAN exhibited a highly efficient oil–water separation achieving 99.2%, excellent absorption capacity of 26 g/g for toluene with an easily recovered performance, and remarkable mechanical durability withstanding the severe environmental conditions. The biodegradable and recyclable C18-Cotton-g-PSAN demonstrated high selectivity for the absorbing of oil and is expected to become sustainable and highly effective materials for oil-spill cleanup and the oily wastewater treatment from households and industries. Endowed with the robust superhydrophobic durability, the superhydrophobic and superoleophilic cotton can be further woven into cotton fabric to demonstrate their versatilities.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Superhydrophobic/Superoleophilic Cotton for Efficient Oil–Water Separation Based on the Combined Octadecanoyl Chain Bonding and Polymer Grafting via Surface-Initiated ATRP

Wang

Zhang

et al. 2019

ACS Appl. Polym. Mater.

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“…Gamma irradiation has several advantages over other techniques, including high penetration power, quick processing, uniform-dose distribution, system flexibility, and ability to be used in various environments 20 – 25 . Gamma irradiation is an eco-friendly method and the most productive 26 – 31 . This study also aims to increase the hydrophilicity of (PVC/HDPE) for oil/water separation applications.…”

Section: Introductionmentioning

confidence: 99%

Gamma irradiation induced surface modification of (PVC/HDPE)/ZnO nanocomposite for enhancing the oil removal and conductivity using COMSOL multiphysics

Ghobashy

El-Gawad

Fayek

et al. 2023

Sci Rep

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Blend nanocomposite film was prepared by loadings of irradiated ZnO in ratios of (5 wt%) inside the PVC/HDPE matrix using a hot-melt extruder technique. The physical and chemical properties of the irradiated and unirradiated ZnO samples are compared. The Vis–UV spectrum of ZnO shows an absorption peak at a wavelength of 373 nm that was slightly red-shifted to 375 nm for an irradiated sample of ZnO at a dose of 25 kGy due to the defect of crystal structure by the oxygen vacancy during gamma irradiations. This growth of the defect site leads to a decrease in energy gaps from 3.8 to 2.08 eV. AC conductivity of ZnO sample increased after the gamma irradiation process (25 kGy). The (PVC/HDPE)/ZnO nanocomposites were re-irradiated with γ rays at 25 kGy in the presence of four different media (silicon oil, sodium silicate, paraffin wax and water). FTIR and XRD were performed to monitor the changes in chemical composition. The new peak at 1723 cm−1 attributed to C=O groups was observed in irradiated (PVC/HDPE)ZnO samples at only sodium silicate and water media. This process induced new function groups on the surface of the (PVC/HDPE)/ZnO blend sample. This work aims to develop (PVC/HDPE)ZnO for oil/water separation. The highest oil adsorption capability was observed in samples functionalized by C=O groups based on the different tested oils. The results suggest that the surface characterization of the (PVC/HDPE)/ZnO can be modified to enhance the oil adsorption potential. Further, the gamma irradiation dose significantly enhanced the AC conductivity compared to the unirradiated sample. According to COMSOL Multiphysics, the irradiated sample (PVC/HDPE)ZnO in water shows perfect uniform electric field distribution in medium voltage cables (22.000 V).

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“…These absorbers do have certain drawbacks, though. For instance, inorganic sorbents displayed some intrinsic limits due to their high density and low oil sorption capabilities. , The bulk of naturally occurring organic sorbents had a low hydrophobicity, or capacity to repel water, which led to high water uptake. Development of novel sorbents with advantages in sorption capacity, selectivity, density, recyclability, hydrophobicity, lipophilia, and environmental friendliness was therefore necessary.…”

Section: Introductionmentioning

confidence: 99%

Radiation Synthesis of Carbon/Aluminum/Silica Aerogel Nanoporous Structure Derived from Polyacrylamide Hydrogel for High Temperature and Oil Removal Applications

et al. 2023

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Aerogel is a high-performance thermal resistance material desired for high-temperature applications like dye-sensitized solar cells, batteries, and fuel cells. To increase the energy efficiency of batteries, an aerogel is required to reduce the energy loss arising from the exothermal reaction. This paper synthesized a different composition of inorganic− organic hybrid material by growing the silica aerogel inside a polyacrylamide (PAAm) hydrogel. The hybrid PaaS/silica aerogel was synthesized using different irradiation doses of gamma rays (10−60 kGy) and different solid contents of PAAm (6.25, 9.37, 12.5, and 30 wt %). Here, PAAm is used as an aerogel formation template and carbon precursor after the carbonization process at a temperature of (150, 350, and 1100 °C). The hybrid PAAm/silica aerogel was converted into aluminum/silicate aerogels after soaking in a solution of AlCl 3 . Then, the carbonization process takes place at a temperature of (150, 350, and 1100 °C) for 2 h to provide C/Al/Si aerogels with a density of around 0.18−0.040 gm/cm 3 and porosity of 84−95%. The hybrid C/Al/Si aerogels presented interconnected networks of porous structures with different pore sizes depending on the carbon and PAAm contents. The sample with a solid content of 30% PAAm in the C/Al/Si aerogel was composed of interconnected fibrils whose diameter was about 50 μm. The structure after carbonization at 350 and 1100 °C was a condensed opening porous 3D network structure. This sample gives the optimum thermal resistance and a very low thermal conductivity of 0.073 (w/m•k) at low carbon content (2.71% at temperature 1100 °C) and high v pore (95%) compared with carbon content 42.38% and v pore (93%) which give 0.102 (w/m•k). This is because at 1100 °C, the carbon atoms evolve to leave an area between Al/Si aerogel particles, increasing the pore size. Furthermore, the Al/Si aerogel had excellent removal ability for various oil samples.

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Radiation crosslinked magnetized wax (PE/Fe3O4) nano composite for selective oil adsorption

Cited by 34 publications

References 18 publications

Superhydrophobic/Superoleophilic Cotton for Efficient Oil–Water Separation Based on the Combined Octadecanoyl Chain Bonding and Polymer Grafting via Surface-Initiated ATRP

Superhydrophobic/Superoleophilic Cotton for Efficient Oil–Water Separation Based on the Combined Octadecanoyl Chain Bonding and Polymer Grafting via Surface-Initiated ATRP

Gamma irradiation induced surface modification of (PVC/HDPE)/ZnO nanocomposite for enhancing the oil removal and conductivity using COMSOL multiphysics

Radiation Synthesis of Carbon/Aluminum/Silica Aerogel Nanoporous Structure Derived from Polyacrylamide Hydrogel for High Temperature and Oil Removal Applications

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