Design of concentrated colloidal dispersions of iron oxide nanoparticles in ionic liquids: Structure and thermal stability from 25 to 200 °C

Riedl, Jesse; Sarkar, Mitradeep; Fiuza, Thiago; Cousin, Fabrice; Depeyrot, J.; Dubois, Emmanuelle; Mériguet, Guillaume; Perzynski, R.; Peyre, Véronique

doi:10.1016/j.jcis.2021.08.017

Cited by 23 publications

(23 citation statements)

References 60 publications

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“…The conclusion is that the microconvection generated by the Brownian motion of the nanoparticles can increase the thermal conductivity of the base fluid. Due to the hydrodynamic connection between Brownian motion nanoparticles, this information combined with various studies on the viscosity of nanofluids is very convincing [43][44][45][46][47][48].…”

Section: Discussionmentioning

confidence: 99%

Marangoni Convection of Dust Particles in the Boundary Layer of Maxwell Nanofluids with Varying Surface Tension and Viscosity

et al. 2021

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The flow of nanofluids is very important in industrial refrigeration systems. The operation of nuclear reactors and the cooling of the entire installation to improve safety and economics are entirely dependent on the application of nanofluids in water. Therefore, a model of Maxwell’s dusty nanofluid with temperature-dependent viscosity, surface suction and variable surface tension under the action of solar radiation is established. The basic equations of momentum and temperature of the dust and liquid phases are solved numerically using the MATLAB bvp4c scheme. In the current evaluation, taking into account variable surface tension and varying viscosity, the effect of dust particles is studied by immersing dust particles in a nanofluid. Qualitative and quantitative discussions are provided to focus on the effect of physical parameters on mass and heat transfer. The propagation results show that this mixing effect can significantly increase the thermal conductivity of nanofluids. With small changes in the surface tension parameters, a stronger drop in the temperature distribution is observed. The suction can significantly reduce the temperature distribution of the liquid and dust phases. The stretchability of the sheet is more conducive to temperature rise. The tables are used to explain how physical parameters affect the Nusselt number and mass transfer. The increased interaction of the liquid with nanoparticles or dust particles is intended to improve the Nusselt number. This model contains features that have not been previously studied, which stimulates demand for this model among all walks of life now and in the future.

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Section: Discussionmentioning

confidence: 99%

Marangoni Convection of Dust Particles in the Boundary Layer of Maxwell Nanofluids with Varying Surface Tension and Viscosity

et al. 2021

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Section: Synthesis Proceduresmentioning

confidence: 99%

“…Long term (several years) colloidal stability, even at relatively high temperatures (up to 200 °C), was achieved recently by adapting the interfacial properties of magnetic nanoparticles to pure ionic liquid carriers. 130 2.3.2 Steric stabilization. The van der Waals interaction energy diverges for particles in contact as long as the Hamaker constant has a finite value.…”

Section: Preparation Of Magnetic Fluidsmentioning

confidence: 99%

Ferrofluids and bio-ferrofluids: looking back and stepping forward

et al. 2022

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“…A nanoparticle size analyzer combining time-resolved DLS (Tr-DLS) and in situ remote optical probe (VASCO KIN, Cordouan Technologies) 34 was used for kinetic monitoring of the dialysis (Figure 1B). By providing valuable information about the size and size-dispersity of BC aggregates, Tr-DLS gives a first insight into the pathway of vesicle formation (Figure 1C and Figure S2).…”

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confidence: 99%

In situ monitoring of block copolymer self-assembly via solvent exchange through controlled dialysis with light and neutron scattering detection

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et al. 2023

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Solution self-assembly of amphiphilic block copolymers (BCs) is typically performed by solvent to water exchange. However, BC assemblies are often trapped in metastable states depending on the mixing conditions, such as the magni-tude and rate of water addition. BC self-assembly can be performed under near thermodynamic control by dialysis which accounts for a slow and gradual water addition. In this communication we report the use of a specifically de-signed dialysis cell to continuously monitor by dynamic light scattering and small-angle neutron scattering the mor-phological changes of PDMS-b-PEG BCs during THF to water exchange. The complete phase diagrams of near-equilibrium structures can then be established. Spherical micelles first form before evolving to rod-like micelles and vesicles, decreasing the total developed interfacial area of self-assembled structures in response to increasing interfacial energy as the water content increases. The dialysis kinetics can be tailored to the time scale of BC self-assembly by modifying the membrane pore size, which is of interest to study the interplay between thermodynamics and kinetics in self-assembly pathways.

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Design of concentrated colloidal dispersions of iron oxide nanoparticles in ionic liquids: Structure and thermal stability from 25 to 200 °C

Cited by 23 publications

References 60 publications

Marangoni Convection of Dust Particles in the Boundary Layer of Maxwell Nanofluids with Varying Surface Tension and Viscosity

Marangoni Convection of Dust Particles in the Boundary Layer of Maxwell Nanofluids with Varying Surface Tension and Viscosity

Ferrofluids and bio-ferrofluids: looking back and stepping forward

In situ monitoring of block copolymer self-assembly via solvent exchange through controlled dialysis with light and neutron scattering detection

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