Experimental study on thermophysical properties of alumina nanoparticle enhanced ionic liquids

Cherecheş, Elena Ionela; Prado, Jose I.; Cherecheş, Marius; Minea, Alina Adriana; Lugo, Luis

doi:10.1016/j.molliq.2019.111332

Cited by 48 publications

(28 citation statements)

References 40 publications

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“…The density of INFs decreases with temperature regardless of the nanoparticle concentration. [10][11][12][13][14]39 This happens because liquids tend to expand when their temperature increases. The density of the dispersions increases with mass concentrations of particles because the density of NPs is higher compared to IL.…”

Section: Densitymentioning

confidence: 99%

Experimental investigation on thermophysical properties of iobiofluids

Radojčin

Bikić

Pavkov

et al. 2022

Advances in Mechanical Engineering

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The aim of this research was to investigate the density, thermal conductivity, and viscosity of dispersions of agricultural biomass particles in ionic liquid [HMIM][NTf2] used as a base fluid. This research is a continuation of the development of IoBioFluids, a new class of dispersions obtained by suspending particles produced from agricultural biomass, as a sustainable alternative to IoNanoFluids. Dispersions with different mass concentration of particles (0, 0.5, 1, 2.5, and 5 wt%) were studied at different temperatures (20°C, 30°C, 40°C, and 50°C). Agricultural biomass, namely sunflower stalks, was used for particle production. The dispersion was prepared by applying the commonly used two-step method. In the first step, particles were produced as dry powder from hydrothermal carbonization and heat treatment in the inert atmosphere oven. In the second step, the particles were dispersed into ionic liquid. A rheological investigation showed that dispersions exhibited Newtonian behavior for shear rates over 10 s−1. Density, thermal conductivity, and dynamic viscosity of dispersions increased with greater mass concentration of particles. Two applied merit criteria suggested a lack of any currently benefit of using the dispersions for heat transfer in the laminar flow regime due to high viscosity of dispersion. The results of criterial analysis showed that experimental data are relatively close to the limit values. Indications are suggesting the possibility of further improvement of IoBioFluid properties as a new heat transfer fluid.

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Section: Densitymentioning

confidence: 99%

Experimental investigation on thermophysical properties of iobiofluids

Radojčin

Bikić

Pavkov

et al. 2022

Advances in Mechanical Engineering

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“…Most of the new fluids contain little concentration of nanoparticles, up to 1 %wt. 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%

“…contains experimental data using Al2O3 as a nanoparticle in four base fluids: [C4mpyrr][NTf2], [C4mim][NTf2], [C2mim][CH3SO3] and a mixture between [C2mim][CH3SO3] and water (with 0.25 mole fraction)[47,62,63,65]. Results concluded that, for 1%wt.…”

mentioning

confidence: 99%

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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“…There is little literature on the influence of ultrasound treatment conditions on the microstructure as well as thermal and rheological properties of INFs. Most of the research in the field was carried out under constant sonication settings [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] . The notable exceptions were works of Wittmar et al [32] , [33] , who investigated rheological properties of INFs containing 0.5 wt% 95% anatase TiO 2 with average particle size 5 nm or 100% anatase TiO 2 with average particle size from 5 to 26.4 nm and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [Emim][NTf 2 ], 1-ethyl-3-methylimidazolium tetrafluoroborate [Emim][BF 4 ], 1-butyl-3-methylimidazolium tetrafluoroborate [Bmim][BF 4 ], or 1-hexyl-3-methylimidazolium tetrafluoroborate [Hmim][BF 4 ], prepared with various sonication times up to 4 h. They concluded that the rheological behavior of nanodispersions was complex and depended on the type of IL.…”

Section: Introductionmentioning

confidence: 99%