Ethylene glycol based silver nanoparticles synthesized by polyol process: Characterization and thermophysical profile

Zeroual, Soukaina; Estellé, Patrice; Cabaleiro, David; Vigolo, Brigitte; Emo, Mélanie; Halim, Wafae; Ouaskit, S.

doi:10.1016/j.molliq.2020.113229

Cited by 46 publications

(16 citation statements)

References 25 publications

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“…The accuracy in thermal conductivity determinations with this device declared by the manufacturer is 5%. However, previous tests with water and ethylene glycol [89,90] show average deviations with literature [91] better than 3%. More details about this device and the followed experimental method can be found in a recent work by Banisharif et al [89].…”

Section: Thermal and Physical Characterizationmentioning

confidence: 67%

Thermal and Physical Characterization of PEG Phase Change Materials Enhanced by Carbon-Based Nanoparticles

et al. 2020

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This paper presents the preparation and thermal/physical characterization of phase change materials (PCMs) based on poly(ethylene glycol) 400 g·mol−1 and nano-enhanced by either carbon black (CB), a raw graphite/diamond nanomixture (G/D-r), a purified graphite/diamond nanomixture (G/D-p) or nano-Diamond nanopowders with purity grades of 87% or 97% (nD87 and nD97, respectively). Differential scanning calorimetry and oscillatory rheology experiments were used to provide an insight into the thermal and mechanical changes taking place during solid-liquid phase transitions of the carbon-based suspensions. PEG400-based samples loaded with 1.0 wt.% of raw graphite/diamond nanomixture (G/D-r) exhibited the lowest sub-cooling effect (with a reduction of ~2 K regarding neat PEG400). The influences that the type of carbon-based nanoadditive and nanoparticle loading (0.50 and 1.0 wt.%) have on dynamic viscosity, thermal conductivity, density and surface tension were also investigated in the temperature range from 288 to 318 K. Non-linear rheological experiments showed that all dispersions exhibited a non-Newtonian pseudo-plastic behavior, which was more noticeable in the case of carbon black nanofluids at low shear rates. The highest enhancements in thermal conductivity were observed for graphite/diamond nanomixtures (3.3–3.6%), while nano-diamond suspensions showed the largest modifications in density (0.64–0.66%). Reductions in surface tension were measured for the two nano-diamond nanopowders (nD87 and nD97), while slight increases (within experimental uncertainties) were observed for dispersions prepared using the other three carbon-based nanopowders. Finally, a good agreement was observed between the experimental surface tension measurements performed using a Du Noüy ring tensiometer and a drop-shape analyzer.

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Section: Thermal and Physical Characterizationmentioning

confidence: 67%

Thermal and Physical Characterization of PEG Phase Change Materials Enhanced by Carbon-Based Nanoparticles

et al. 2020

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“…This device has been designed to measure the thermal conductivity of liquids in the range 0.01-2 W·m −1 ·K −1 under short time of measurement to avoid convection. The full description of the experimental set-up has been previously reported in [ 66 , 67 ] and a similar experimental procedure has been followed. A power supply varying between 90 and 110 mW, to reach a temperature rise of 1.2 K, has been applied here to samples with a time measurement of 1.5 s for thermal conductivity evaluation.…”

Section: Methodsmentioning

confidence: 99%

“…This value has been classically calculated in the linear region of the temperature enhancement versus time in logarithm scale. The temperature probe and the wire of the sensor have been calibrated with DW (DIUF, CAS 1132-18-5, Fisher Chemical, 0.599 W·m −1 ·K −1 at 293.15 K) before measurements [ 67 ]. Once the device calibrated, the thermal conductivity of deionized water has been measured in the temperature range 278.15-333.15 K, as shown in Figure 1 , in order to evaluate the experimental uncertainty of the device.…”

Section: Methodsmentioning

confidence: 99%

Few-Layer Graphene-Based Nanofluids with Enhanced Thermal Conductivity

et al. 2020

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High-quality graphene is an especially promising carbon nanomaterial for developing nanofluids for enhancing heat transfer in fluid circulation systems. We report a complete study on few layer graphene (FLG) based nanofluids, including FLG synthesis, FLG-based nanofluid preparation, and their thermal conductivity. The FLG sample is synthesized by an original mechanical exfoliation method. The morphological and structural characterization are investigated by both scanning and transmission electron microscopy and Raman spectroscopy. The chosen two-step method involves the use of thee nonionic surfactants (Triton X-100, Pluronic® P123, and Gum Arabic), a commercial mixture of water and propylene glycol and a mass content in FLG from 0.05 to 0.5%. The thermal conductivity measurements of the three FLG-based nanofluid series are carried out in the temperature range 283.15–323.15 K by the transient hot-wire method. From a modeling analysis of the nanofluid thermal conductivity behavior, it is finally shown that synergetic effects of FLG nanosheet size and thermal resistance at the FLG interface both have significant impact on the evidenced thermal conductivity enhancement.

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“…The mixture is then heated to the boiling point temperature until the reaction completion. After that, the solution is kept to cool down to room temperature, and the nanoparticles are separated by centrifugation; the nanoparticles are then washed thoroughly by ethanol and dried (Zeroual et al 2020 ). Figure 4 displays a schematic diagram showing the steps of the polyol technique for Ag NPs production.…”

Section: Nanoparticles Preparationmentioning

confidence: 99%

A review on recent trends of antiviral nanoparticles and airborne filters: special insight on COVID-19 virus

Jazie

Albaaji

Abed

2021

Air Qual Atmos Health

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Novel corona virus (COVID-19) pandemic in the last 4 months stimulates the international scientific community to search for vaccine of antiviral agents suitable for in activating the virus inside and outside the human body. More than 4 million people globally are infected by the virus and about 300,000 dead cases until this moment. The ventilation and airborne filters are also investigated aiming to develop an efficient antiviral filtration technology. Human secretion of the infected person as nasal or saliva droplets goes as airborne and distributes the virus everywhere around the person. N95 and N98 filters are the must use filters for capturing particles of sizes around 300 nm. The average size of the novel corona virus (COVID-19) is 100 nm and there is no standard or special filter suitable for this virus. The nanoparticle-coated airborne filter is a suitable technique in this regard. While the efficiency of this type of filters still needs to be enhanced, new developed nanofiber filters are proposed. Most recently, the charged nanofiber filters of sizes below 100 nm are developed and provide an efficient viral filtration and inactivation. The efficiency of filter must be kept at accepted level without increasing the pressure drop. The present review outlines the most efficient antiviral nanoparticles including the recent functional nanoparticles. The filtration theory, filtration modeling, filter testing, and different types of filter with special concentration on the charged nanofiber filter were discussed. The charged nanofiber filter able to capture novel corona virus (COVID-19) with 94% efficiency and a pressure drop less than 20 MPa.

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Ethylene glycol based silver nanoparticles synthesized by polyol process: Characterization and thermophysical profile

Cited by 46 publications

References 25 publications

Thermal and Physical Characterization of PEG Phase Change Materials Enhanced by Carbon-Based Nanoparticles

Thermal and Physical Characterization of PEG Phase Change Materials Enhanced by Carbon-Based Nanoparticles

Few-Layer Graphene-Based Nanofluids with Enhanced Thermal Conductivity

A review on recent trends of antiviral nanoparticles and airborne filters: special insight on COVID-19 virus

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