Stability and thermophysical properties of non-covalently functionalized graphene nanoplatelets nanofluids

Sarsam, Wail Sami; Amiri, Ahmad; Kazi, S.N.; Badarudin, A.

doi:10.1016/j.enconman.2016.02.082

Cited by 182 publications

(52 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some important surfactants with GNFs are: sodium carboxymethyl celluloses (NaCMC) [131], oleylamine [132], sodium dodecyl sulfate (SDS), sodium dodecyl benzene sulfonate (SDBS) [135], Tween 80, Acumer Terpolymer [54], sodium deoxycholate (NaDC) [162], Triton X100 [54,80,139], gum arabic (GA), cetyltrimethylammonium bromide (CTAB) [54,135]. Nevertheless, using surfactants also affects the thermophysical characteristics of the nanofluids in many ways [54,135,210]. It should be noted that this technique cannot be useful for nanofluids acting at high temperature as a result of damage of bonding between the nanoparticle and surfactant.…”

Section: Stability Enhancement Proceduresmentioning

confidence: 99%

“…Oleylamine [133] ZPT N/A N/A [135] ZPT, UV-Vis~ 60 days Gum arabic, cetyltrimethylammonium bromide, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate [136] ZPT N/A N/A [139] UV-Vis~ 200 days Triton X-100 [76] SPC~ 30 days N/A [142] ZPT~ 45 days N/A [143] ZPT N/A N/A [77] ZPT, DLS N/A N/A [78] ZPT N/A N/A [65] UV-Vis~ 1 week N/A [54] ZPT N/A Gum arabic, Tween 80, CTAB, Triton X100, Acumer Terpolymer [80] UV-Vis~ 10 days Triton X-100 [147] UV-Vis~ 10 days N/A [74] ZPT N/A N/A [149] SEM 12 h N/A [156] SPC~ 30 days N/A [157] ZPT, UV-Vis~ 2 weeks N/A [158] ZPT N/A N/A [64] SPC, UV-Vis~ 2 weeks N/A [159] UV-Vis~ 60 days N/A [161] UV-Vis~ 528 h N/A [162] UV-Vis~ 15 days Sodium deoxycholate [66] UV-Vis > 5 months N/A [67] UV-Vis, ZPT N/A N/A in an ammonia solution. Grinding can be utilized to enhance significantly the dispersibility property in BF water [207].…”

Section: Stability Enhancement Proceduresmentioning

confidence: 99%

See 1 more Smart Citation

Review on the recent progress in the preparation and stability of graphene-based nanofluids

Mahian

Wongwises

et al. 2020

J Therm Anal Calorim

112

View full text Add to dashboard Cite

Graphene has attracted much attention from the science world because of its mechanical, thermal, and physical properties. Graphene nanofluid is well known for its easy synthesis, longer suspension stability, higher heat conductivity, lower erosion, corrosion, larger surface area/volume ratio, and lower demand for pumping power. This article is an audit of experimental outcome about the preparation and stability of graphene-based nanofluids. Numerous researches to prepare and stabilize graphene-based nanofluids have been developed, and it is indispensable to create a complete list of the approaches. This research work outlines the advancement on preparation and assessment methods and the techniques to enhance the stability of graphene nanofluids and outlook prospects.

show abstract

Section: Stability Enhancement Proceduresmentioning

confidence: 99%

Section: Stability Enhancement Proceduresmentioning

confidence: 99%

Review on the recent progress in the preparation and stability of graphene-based nanofluids

Mahian

Wongwises

et al. 2020

J Therm Anal Calorim

112

View full text Add to dashboard Cite

show abstract

“…In water- and ethylene glycol-based nanofluids, the surfactants predominating in the literature for non-covalent options are sodium dodecyl benzene sulphonate (SDBS) [16, 20–22], polyvinyl alcohol (PVA) [23], and gum Arabic [14, 22], while the oxidation following the original version [24, 25] or modifications [26] of Hummers method are the most common with covalent functionalizations. The main downside of using non-covalent methods is that the addition of a surfactant considerably increases the viscosity of the nanofluid, leading to higher pressure drops in thermal equipment.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Capability of (Ethylene Glycol + Water)-Based Nanofluids Containing Graphene Nanoplatelets: Design and Thermophysical Profile

et al. 2017

View full text Add to dashboard Cite

This research aims at studying the stability and thermophysical properties of nanofluids designed as dispersions of sulfonic acid-functionalized graphene nanoplatelets in an (ethylene glycol + water) mixture at (10:90)% mass ratio. Nanofluid preparation conditions were defined through a stability analysis based on zeta potential and dynamic light scattering (DLS) measurements. Thermal conductivity, dynamic viscosity, and density were experimentally measured in the temperature range from 283.15 to 343.15 K and nanoparticle mass concentrations of up to 0.50% by using a transient plate source, a rotational rheometer, and a vibrating-tube technique, respectively. Thermal conductivity enhancements reach up to 5% without a clear effect of temperature while rheological tests evidence a Newtonian behavior of the studied nanofluids. Different equations such as the Nan, Vogel-Fulcher-Tamman (VFT), or Maron-Pierce (MP) models were utilized to describe the temperature or nanoparticle concentration dependences of thermal conductivity and viscosity. Finally, different figures of merit based on the experimental values of thermophysical properties were also used to compare the heat transfer capability and pumping power between nanofluids and base fluid.

show abstract

“…For instance, the presence of surfactants leads to a reduction in the thermal conductivity of the nanofluid . Graphene has very high thermal conductivity and can be dispersed in aqueous media using surfactants . Graphene nano platelets (GNP) have the following features which make it popular: It has several layers of graphene sheets (2 nm thick and 2 μm long). It has excellent thermal conductivity. It has a high‐specific surface area, that is strong van der Waals relation between the layers of GNPs. It is highly ordered graphitic carbon, that is high stability, high mechanical strength, and low cost. It has high electrical conductivity. …”

Section: Stabilitymentioning

confidence: 99%

“…25 Graphene has very high thermal conductivity and can be dispersed in aqueous media using surfactants. [26][27][28] Graphene nano platelets (GNP) have the following features which make it popular:…”

Section: Addition Of Surfactantsmentioning

confidence: 99%

A review of nanofluid preparation, stability, and thermo‐physical properties

Dey

Kumar

Samantaray

2017

Heat Trans. Asian Res.

106

View full text Add to dashboard Cite

This paper represents a comprehensive review on the preparation and stability of nanofluid, the convective heat transfer coefficient and different thermo‐physical properties such as thermal conductivity, specific heat capacity, viscosity, and so on. Here, for each thermo‐physical property, measurement methods, enhancement mechanisms, and criticisms of different studies are also presented. However, based on the available literature, it is concluded that a nanofluid has, in general, better thermo‐physical properties even at a very low particle concentration (typically 1% or less) than conventional heat transfer fluids. The only drawback is high viscosity which leads to a higher pressure drop. At a very low particle concentration, this drawback can be minimized. Three tables are provided for three thermo‐physical properties namely thermal conductivity, specific heat capacity, and viscosity, which can be used as a ready reference for calculating the nanofluid properties.

show abstract

Stability and thermophysical properties of non-covalently functionalized graphene nanoplatelets nanofluids

Cited by 182 publications

References 61 publications

Review on the recent progress in the preparation and stability of graphene-based nanofluids

Review on the recent progress in the preparation and stability of graphene-based nanofluids

Heat Transfer Capability of (Ethylene Glycol + Water)-Based Nanofluids Containing Graphene Nanoplatelets: Design and Thermophysical Profile

A review of nanofluid preparation, stability, and thermo‐physical properties

Contact Info

Product

Resources

About