Ru-Imidazolium Halide IoNanofluids: Synthesis, Structural, Morphological and Thermophysical Properties

Patil, Vaishali S.; Cera-Manjarres, Andry; Salavera, Daniel; Rode, Chandrashekhar V.; Patil, K. R.; Castro, C. A. Nieto de; Coronas, Alberto

doi:10.1166/jon.2016.1205

Cited by 30 publications

(12 citation statements)

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“…For instance, thermal conductivity was found almost constant with temperature variation of several ionic liquids with nanoparticles measured by Franca [26]. The same phenomenon was noticed also by other researchers (see, for example, Ribeiro et al [59], Patil et al [60], Ferreira et al [3] and Ribeiro et al [4]) concluding that the thermal conductivity of ionic liquids with nanoparticles is following the same trend as that found in the literature for molecular liquids [69] and other ionic liquids [24,53,[70][71][72].…”

Section: Thermal Conductivitysupporting

confidence: 79%

“…with several exceptions when the nanoparticles fractions are up to 0.05 (see, for example, Franca et al [26], Paul [61], Paul et al [62], Chereches et al [47,65], Hosseinghorbani et al [68]). As for base fluids, several ionic liquids were considered and few authors, such as, for example, Xie et al [37] and Chereches et al [47,60], made mixtures between water and ILs.…”

Section: Thermal Conductivitymentioning

confidence: 99%

“…Most of the experimental studies, as can be seen from Table 4, noticed an increase in viscosity when nanoparticles were added to the ionic liquids, depending on nanoparticles mass concentration (see, for example, Paul et al [62], Fox et al [72]). Besides that, several authors (see Patil et al [60], Ferreira et al [3], Zhang et al [68]) found a decrease in viscosity when nanoparticles were added and explained this phenomenon relying on the low density and lubricating properties of nanoparticles, on the interactions between the ions of ILs and the MWCNT, which can hardly be acceptable without a scientific explanation. Additionally, a comparison is shown in Figures 7 and 8 in terms of nanoparticles and/or ionic liquid influence on viscosity values.…”

Section: Viscositymentioning

confidence: 99%

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Ionic Liquids-Based Nanocolloids—A Review of Progress and Prospects in Convective Heat Transfer Applications

Minea

Murshed

2021

Nanomaterials

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Ionic liquids are a new and challenging class of fluids with great and tunable properties, having the capability of an extensive area of real-life applications, from chemistry, biology, medicine to heat transfer. These fluids are often considered as green solvents. Several properties of these fluids can be enhanced by adding nanoparticles following the idea of nanofluids. These ionic liquids-based nanocolloids are also termed in the literature as ionanofluids or nanoparticles-enhanced ionic liquids. This review summarizes the findings in both areas of ionic liquids and ionic liquids nanocolloids (i.e., ionic liquids with nanoparticles in suspension) with direct applicability in convective heat transfer applications. The review presents in a unified manner the progress and prospects of ionic liquids and their nanocolloids from preparation, thermophysical properties and equally experimental and numerical works. As the heat transfer enhancement requires innovative fluids, this new class of ionic liquids-based nanocolloids is certainly a viable option, despite the noticed drawbacks. Nevertheless, experimental studies are very limited, and thus, extensive experiments are needed to elucidate ionic liquids interaction with nanoparticles, as well as their behavior in convective heat transfer.

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Section: Thermal Conductivitysupporting

confidence: 79%

Section: Thermal Conductivitymentioning

confidence: 99%

Section: Viscositymentioning

confidence: 99%

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Ionic Liquids-Based Nanocolloids—A Review of Progress and Prospects in Convective Heat Transfer Applications

Minea

Murshed

2021

Nanomaterials

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“…The effect of ruthenium (Ru) nanoparticles on the density of ILs having 1-Butyl-3-methyl imidazolium cation [C 4 mim] + within a temperature range of 20 • C to 70 • C was experimentally studied by Patil et al [86]. The experimental data showed a gradual reduction of the densities of the ILs-based nanofluids while temperature increased.…”

Section: Modelsmentioning

confidence: 99%

A Critical Review on the Development of Ionic Liquids-Based Nanofluids as Heat Transfer Fluids for Solar Thermal Energy

et al. 2021

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In recent years, solar thermal energy (STE) has attracted energy researchers because of its higher efficacy compared to the photovoltaic solar cell. STE is one of the forms of solar energy whereby heat is transferred via a secondary medium called heat transfer fluids (HTFs). Therefore, the overall performance of STE depends on the thermophysical properties and thermal performance of the HTFs. Traditional HTFs suffer from low decomposition temperature, high melting point, and higher vapor pressure. To overcome these limitations, researchers have recently begun working on new HTFs for STE. Ionic liquids (ILs) are considered as a potential candidate for the next generation of HTFs because of their enhanced thermophysical properties, such as thermal stability at high temperature, insignificant vapor pressure, and high ionic conductivity. In addition, thermophysical properties and thermal performance of ILs can be further enhanced by dispersing nanoparticles, which is one of the emerging research interests to improve the efficiency of the solar thermal system. This paper summarizes the recent study of ILs-based nanofluids as HTFs. These summaries are divided into two sections (i) thermophysical properties studies, such as density, viscosity, thermal conductivity, and heat capacity, and (ii) thermal performance studies such as natural convection and forced convection. Synthesis of ILs-based nanofluids and thermophysical properties measurement techniques are also discussed. Based on these state-of-the-art summaries, we offer recommendations for potential future research direction for ILs-based nanofluids.

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“…Although most of the samples loaded with 1 wt.% of graphene or graphene derivatives exhibit viscosity enhancements larger than 100% [116,118,138], some researchers [99,116,135,138] obtained rises in dynamic viscosity of less or around 40% for that same concentration of functionalized graphene nanoplatelets [99,116] or graphene decorated with Fe 3 O 4 [135,138]. [139], unusual reductions in viscosity with rising nanoparticle loading were also reported for other ionanofluids containing different nanoadditives such as multi-walled carbon nanotubes [140,141] or Ru nanoparticles [142]. In the case of base ionanofluids, such unexpected reductions were previously attributed in the literature to: i) a certain self-lubrication effect of nanoparticles [102,143,144] or ii) the possible formation of hydrogen bonds between carbonbased nanoparticles and the cation of the IL which, in turn, may reduce Coulombic attractions between cations and anions present in the ionic liquid used as base fluid [141].…”

Section: Insert Here Table 6 4 Viscosity Enhancement: Impact Of Base Fluids Temperature and Graphene Derivatives Concentrationmentioning

confidence: 91%

Graphene-based nanofluids: A comprehensive review about rheological behavior and dynamic viscosity

Hamze

Cabaleiro

Estellé

2021

Journal of Molecular Liquids

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Graphene derivatives are promising nanomaterials for producing nanofluids due to their excellent intrinsic characteristics. Among thermophysical profile, and in addition to thermal properties, relevant property to evaluate the potential of graphene-based nanofluids as efficient and reliable heat transfer fluids is viscosity, and rheological behavior in a wider sense. Therefore, the aim of this review paper is to give a comprehensive overview of the current knowledge and results about the rheological properties of graphene-based nanofluids. After a brief description of the most common methods used for fabricating or extracting graphene derivatives, the main steps of graphenebased nanofluids preparation are introduced. Then, literature results on Newtonian/non-Newtonian behavior as well as variations in apparent dynamic viscosity of suspensions containing graphene derivatives are reviewed, analyzing the effects of shear rate, concentration, base fluids and temperature. Such an analysis is performed distinguishing the different types of graphene derivatives, namely graphene oxide, reduced graphene oxide, pristine graphene, graphene quantum dots, functionalized and doped graphene. Also, the impact of base fluid, temperature, concentration and surfactant on viscosity enhancement of graphene-based nanofluids is graphically and newly presented and discussed. In addition, the current models for viscosity prediction or correlation of those nanofluids are detailed. Finally, challenges and future works are summarized.

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Ru-Imidazolium Halide IoNanofluids: Synthesis, Structural, Morphological and Thermophysical Properties

Cited by 30 publications

References 0 publications

Ionic Liquids-Based Nanocolloids—A Review of Progress and Prospects in Convective Heat Transfer Applications

Ionic Liquids-Based Nanocolloids—A Review of Progress and Prospects in Convective Heat Transfer Applications

A Critical Review on the Development of Ionic Liquids-Based Nanofluids as Heat Transfer Fluids for Solar Thermal Energy

Graphene-based nanofluids: A comprehensive review about rheological behavior and dynamic viscosity

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