Synthesis of 9-octadecenoic acid grafted graphene modified with polystyrene for efficient light oil removal from water

Alghunaimi, Fahd; Alsaeed, Duaa J.; Harith, Abdullah M. Al; Saleh, Tawfik A.

doi:10.1016/j.jclepro.2019.05.239

Cited by 59 publications

(12 citation statements)

References 44 publications

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“…Expanded polytetrafluoroethylene (ePTFE) has been widely used in many applications due to its hydrophobicity, excellent chemical resistance, and large service temperature range . Graphite is a material with excellent performance and is widely used to isolate graphene . It has the advantages of high temperature resistance, electrical conductivity, thermal conductivity, lubricity, chemical stability, thermal shock resistance, and low cost.…”

Section: Introductionmentioning

confidence: 99%

Expanded Polytetrafluoroethylene/Graphite Composites for Easy Water/Oil Separation

Aturaliya

Wang

et al. 2020

ACS Appl. Mater. Interfaces

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Oil spills in the ocean greatly threaten local environments, marine creatures, and coastal economies. An automatic water/oil separation material system was proposed in this study, and a tubular geometry was chosen to demonstrate the water/oil separation efficiency and effectiveness. The water/oil separation tubes were made of expanded polytetrafluoroethylene (ePTFE) and graphite composites. The permeation pressures of water and oil through the tube walls were tuned by adjusting the ePTFE microstructure, which, in turn, depended on the degree of expansion and the graphite content. Fourier-transform infrared spectroscopy was performed to confirm the compositions of the ePTFE/graphite composites, and a scanning electron microscope was used to examine the microstructure and morphology of the expanded PTFE/graphite composite tubes. When a proper pressure was applied, which was higher than the oil’s permeation pressure (3.0 kPa) but lower than the water’s permeation pressure (57 kPa), the oil leaked out of the tube walls while the water went through the ePTFE/graphite tubes. As such, the water/oil mixture could be separated and collected in different containers or an outer tube. Due to this automatic separation, the whole process could be done continuously and conveniently, thus exhibiting great potential in the practical applications of oil spill and water separation/remediation.

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Section: Introductionmentioning

confidence: 99%

Expanded Polytetrafluoroethylene/Graphite Composites for Easy Water/Oil Separation

Aturaliya

Wang

et al. 2020

ACS Appl. Mater. Interfaces

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“…GpowC exhibits a broad and intense D-band indicative of functionalized graphene with more edge states. The observed 2D band is weak and very broad, which shows the presence of exfoliated layers of defect-rich functionalized graphene similar to the case of rGO, usually obtained by chemical reduction. , The calculated I D / I G ratio of GpowC from Figure is 0.74, which is higher than that of GpowA ( I D / I G is 0.20), confirming high density of defects in GpowC. , To further investigate the presence of functional groups in GpowA and GpowC samples, Fourier transform-infrared spectroscopy (FT-IR) was conducted (Figure S1). The GpowC spectra show bands at 3500 and 1160 cm –1 corresponding to −OH and C–O vibrational modes supporting the presence of functional groups on GpowC.…”

Section: Results and Discussionmentioning

confidence: 77%

“…28,29 The calculated I D /I G ratio of GpowC from Figure 1 is 0.74, which is higher than that of GpowA (I D /I G is 0.20), confirming high density of defects in GpowC. 30,31 To further investigate the presence of functional groups in GpowA and GpowC samples, Fourier transforminfrared spectroscopy (FT-IR) was conducted (Figure S1). The GpowC spectra show bands at 3500 and 1160 cm −1 corresponding to −OH and C−O vibrational modes supporting the presence of functional groups on GpowC.…”

Section: Resultsmentioning

confidence: 95%

Effect of Graphene and MoS₂ Flakes in Industrial Oils to Enhance Lubrication

Singh

Choudhary

et al. 2019

ACS Omega

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Tribological studies of the 2D nanoadditives such as MoS2 and graphene are mostly performed in base oils such as SN500, SN150, or paraffin. We have focused on their effect in lubrication properties of industrial oils (e.g., axle, transmission, and compressor oils) along with SN500 oil employing a four-ball tester. Two types of graphene powders (GpowA with fewer defects than GpowC), MoS2 powder, and their physical mixtures are chosen as nanoadditives. The tribology performance for 0.05 wt% of additives in various industrial oils is evaluated by monitoring the coefficient of friction (COF) during rubbing and wear scar diameter (WSD) of the steel balls after rubbing. Elemental analysis and electron microscopy have been performed on the wear surfaces for evidence of any tribofilm formation. GpowA favors antifriction for axle and transmission oils with 40% reduction in axle oil, whereas it improved antiwear properties in most of the oils. GpowC shows a COF decrement by 12% only for compressor oil, but contribute to wear reduction in all oils. The observed COF reduction is attributed to the compatibility of nonfunctionalized GpowA with nonpolar axle oil and functionalized GpowC with polar compressor oil. MoS2 shows a decrease in the COF and WSD in most industrial oils; the best being 60% COF and 7% WSD reduction in axle oil. For additives in oils that favor antiwear, flakes or particles are observed on the wear surface supported by the higher elemental contribution of the constituents from the wear region. The mixtures of GpowA or C with MoS2, however, does not seem to favor improvement in the COF or WSD in industrial oils. With assistance from oleylamine surfactants, the lubrication properties of most additives are improved, particularly for the mixtures with 12–15% COF reduction and 4–7% WSD reduction in compressor oil. The study indicates that a large sheet size of high-quality graphene aids antifriction and addition of surfactant molecules facilitates a co-operative effect between MoS2 and graphene for improved tribology.

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“…Recently, a wide variety of advanced and novel absorbent materials possessing oleophilic and hydrophobic surfaces with excellent adsorption performance have been synthesized for the separation and recovery of oil from water. Among such absorbents are fiber sheets [ 25 , 26 , 27 , 28 , 29 ], alumina [ 30 , 31 ], zeolites [ 32 , 33 , 34 ], silica [ 35 ], polypropylene [ 36 , 37 , 38 , 39 ], and polystyrene [ 40 , 41 , 42 , 43 ]. Such sorbents have certain disadvantages that limit their absorption efficiency, including their low sorption capacities, low recovery efficiencies, production of toxic wastes, and poor buoyancy characteristics.…”

Section: Introductionmentioning

confidence: 99%

Recent Developments and Advancements in Graphene-Based Technologies for Oil Spill Cleanup and Oil–Water Separation Processes

et al. 2021

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The vast demand for petroleum industry products led to the increased production of oily wastewaters and has led to many possible separation technologies. In addition to production-related oily wastewater, direct oil spills are associated with detrimental effects on the local ecosystems. Accordingly, this review paper aims to tackle the oil spill cleanup issue as well as water separation by providing a wide range of graphene-based technologies. These include graphene-based membranes; graphene sponges; graphene-decorated meshes; graphene hydrogels; graphene aerogels; graphene foam; and graphene-coated cotton. Sponges and aerogels modified by graphene and reduced graphene oxide demonstrated effective oil water separation owing to their superhydrophobic/superoleophilic properties. In addition, oil particles are intercepted while allowing water molecules to penetrate the graphene-oxide-coated metal meshes and membranes thanks to their superhydrophilic/underwater superoleophobic properties. Finally, we offer future perspectives on oil water separation that are hindering the advancements of such technologies and their large-scale applications.

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Synthesis of 9-octadecenoic acid grafted graphene modified with polystyrene for efficient light oil removal from water

Cited by 59 publications

References 44 publications

Expanded Polytetrafluoroethylene/Graphite Composites for Easy Water/Oil Separation

Expanded Polytetrafluoroethylene/Graphite Composites for Easy Water/Oil Separation

Effect of Graphene and MoS₂ Flakes in Industrial Oils to Enhance Lubrication

Recent Developments and Advancements in Graphene-Based Technologies for Oil Spill Cleanup and Oil–Water Separation Processes

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Synthesis of 9-octadecenoic acid grafted graphene modified with polystyrene for efficient light oil removal from water

Cited by 59 publications

References 44 publications

Expanded Polytetrafluoroethylene/Graphite Composites for Easy Water/Oil Separation

Expanded Polytetrafluoroethylene/Graphite Composites for Easy Water/Oil Separation

Effect of Graphene and MoS2 Flakes in Industrial Oils to Enhance Lubrication

Recent Developments and Advancements in Graphene-Based Technologies for Oil Spill Cleanup and Oil–Water Separation Processes

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Effect of Graphene and MoS₂ Flakes in Industrial Oils to Enhance Lubrication