Preparation, characterization, and rheological properties of graphene–glycerol nanofluids

Moghaddam, Monireh B.; Goharshadi, Elaheh Kafshdare; Entezari, Mohammad Hassan; Nancarrow, Paul

doi:10.1016/j.cej.2013.07.006

Cited by 136 publications

(54 citation statements)

References 59 publications

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“…The G band is always in the range 1,500-1,630 cm -1 . The D band is a defect-induced breathing mode of A 1g symmetry involving phonons near the K zone boundary (Moghaddam et al 2013). This mode is forbidden in perfect infinite graphite and becomes active in the presence of disorder.…”

Section: Resultsmentioning

confidence: 99%

“…One of the most important rheological measurements is determining the dynamic viscosity, which is an important transport property for applications of nanofluids in thermal devices such as heat exchangers or cooling systems. Researchers accomplished some works on the viscosity of different nanofluids focusing on the effective parameters like temperature, shear rate, and particle size, shape, and concentration (Azizi-Toupkanloo et al 2014;Goharshadi and Hadadian 2012;Moghaddam et al 2013;Ruan and Jacobi 2012). Tesfai et al (2013) investigated the rheological properties of aqueous suspension of GO.…”

Section: Introductionmentioning

confidence: 99%

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Electrical conductivity, thermal conductivity, and rheological properties of graphene oxide-based nanofluids

Hadadian

Goharshadi

Youssefi³

2014

J Nanopart Res

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154

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Highly stable graphene oxide (GO)-based nanofluids were simply prepared by dispersing graphite oxide with the average crystallite size of 20 nm, in polar base fluids without using any surfactant. Electrical conductivity, thermal conductivity, and rheological properties of the nanofluids were measured at different mass fractions and various temperatures. An enormous enhancement, 25,678 %, in electrical conductivity of distilled water was observed by loading 0.0006 mass fraction of GO at 25°C. GO-ethylene glycol nanofluids exhibited a non-Newtonian shearthinning behavior followed by a shear-independent region. This shear-thinning behavior became more pronounced at higher GO concentrations. The maximum ratio of the viscosity of nanofluid to that of the ethylene glycol as a base fluid was 3.4 for the mass fraction of 0.005 of GO at 20°C under shear rate of 27.5 s -1 . Thermal conductivity enhancement of 30 % was obtained for GO-ethylene glycol nanofluid for mass fraction of 0.07. The measurement of the transport properties of this new kind of nanofluid showed that it could provide an ideal fluid for heat transfer and electronic applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrical conductivity, thermal conductivity, and rheological properties of graphene oxide-based nanofluids

Hadadian

Goharshadi

Youssefi³

2014

J Nanopart Res

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154

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“…Graphene was synthesized similar to our previous work (Moghaddam et al 2013). Briefly, 2 g Mg ribbons was burned in dry ice at room temperature.…”

Section: Preparation Of Graphenementioning

confidence: 99%

Adsorption of hexavalent chromium ions from aqueous solution by graphene nanosheets: kinetic and thermodynamic studies

Goharshadi

Moghaddam

2015

Int. J. Environ. Sci. Technol.

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In the present study, a batch system was used to investigate the adsorption of chromium (VI) ions from an aqueous solution by graphene nanosheets. Graphene is decorated with functional groups containing oxygen such as epoxy and hydroxyl on the basal plane. The large negative charge density available on graphene causes effective adsorption of chromium (VI) ions from aqueous solutions. The adsorption capacity and rate of chromium (VI) ions at different temperatures, adsorbent dosages, initial concentrations, and contact times were evaluated. The kinetic study illustrated that the adsorption of chromium (VI) ions onto graphene obeys the pseudo-second-order model with activation energy of 21.91 kJ mol -1 . The chromium (VI) ions adsorption was well explained using Dubinin-Radushkevich isotherm model. The values of standard enthalpy, entropy, and Gibbs free energy changes at 25°C were calculated as 686.07 kJ mol -1 , 2.38 kJ mol -1 K -1 , and -22.43 kJ mol -1 , respectively. In this work, graphene was prepared via a green method. Transmission electron microscopy, Fourier transform-infrared spectroscopy, energy-dispersive X-ray analysis, powder X-ray diffraction, Boehm's titration, and N 2 adsorption-desorption techniques revealed a high-quality few-layer nanosheets of graphene with surface area and inter-planar spacing of 594.7 m 2 g -1 and 3.6 Å , respectively.

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“…They also reported that the enhancement of the nanofluid held for 3-days was higher than that of the freshly prepared nanofluid. The work of Moghaddam et al [118] was on graphene nanofluid in glycerol, at the low shear rate, the nanofluid showed shear thinning behaviour for all temperature but at high shear rate, the nanofluid behaved as Newtonian fluid and the shear thinning behaviour increased with increase in concentration.…”

Section: Newtonian and Non-newtonian Flow Behaviour Of Nanofluidsmentioning

confidence: 99%

“…Shear thinning Esmaeilzadel et al [96] ZrO 2 Adsorption Addition of ZrO 2 to SDS surfactant increased the adsorption onto fluid/fluid interface rather than solid-liquid interface Abdelhalin et al [116] Gold Newtonian Gold in water viscosity decreased with a rise in temperature. Resiga et al [122] Magnetite Newtonian Magnetite in transformer oil Duan et al [117] Graphite Shear-thinning Graphite in deionized water enhancement of nanoparticle held for 3-days was higher than freshly prepared one Moghaddam et al [118] Graphene Shear thinning/Newtonian Shear thinning for at all temperature and low shear rate. At high shear rate it was Newtonian, then thinning with increase in concentration Moatter and Cagincara [121] Fe 3 O 4 Shear thinning Fe 3 O 4 in PEG all suspension showed shearthinning Zaballa et al [101] Alumina Adsorption Alumina was used at reservoir condition with Mirador-formation plug cores, production increased by 100,000bbl Bayat et al [97] Al 2 O 3 , TiO 2 Retention Decline in recovery as a result of clay in the porous media, position of clay at the porethroat caused trapping Cheraghain [137] Fumed-silica Pseudoplastic Viscosity increased with weight of nanoparticle nanoparticle retention and entrapment must be prevented to the barest minimum for a successful wettability alteration to be achieved.…”

Section: Challenges Of Nanoparticles In Altering Wettabilitymentioning

confidence: 99%

Mechanism governing nanoparticle flow behaviour in porous media: insight for enhanced oil recovery applications

Agi

Gbadamosi

2018

Int Nano Lett

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Nanotechnology has found its way to petroleum engineering, it is well-accepted path in the oil and gas industry to recover more oil trapped in the reservoir. But the addition of nanoparticles to a liquid can result in the simplest flow becoming complex. To understand the working mechanism, there is a need to study the flow behaviour of these particles. This review highlights the mechanism affecting the flow of nanoparticles in porous media as it relates to enhanced oil recovery. The discussion focuses on chemical-enhanced oil recovery, a review on laboratory experiment on wettability alteration, effect of interfacial tension and the stability of emulsion and foam is discussed. The flow behaviour of nanoparticles in porous media was discussed laying emphasis on the physical aspect of the flow, the microscopic rheological behaviour and the adsorption of the nanoparticles. It was observed that nanofluids exhibit Newtonian behaviour at low shear rate and non-Newtonian behaviour at high shear rate. Gravitational and capillary forces are responsible for the shift in wettability from oil-wet to water-wet. The dominant mechanisms of foam flow process were lamellae division and bubble to multiple bubble lamellae division. In a water-wet system, the dominant mechanism of flow process and residual oil mobilization are lamellae division and emulsification, respectively. Whereas in an oil-wet system, the generation of pre-spinning continuous gas foam was the dominant mechanism. The literature review on oil displacement test and field trials indicates that nanoparticles can recover additional oil. The challenges encountered have opened new frontier for research and are highlighted herein.

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Preparation, characterization, and rheological properties of graphene–glycerol nanofluids

Cited by 136 publications

References 59 publications

Electrical conductivity, thermal conductivity, and rheological properties of graphene oxide-based nanofluids

Electrical conductivity, thermal conductivity, and rheological properties of graphene oxide-based nanofluids

Adsorption of hexavalent chromium ions from aqueous solution by graphene nanosheets: kinetic and thermodynamic studies

Mechanism governing nanoparticle flow behaviour in porous media: insight for enhanced oil recovery applications

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