Thermophysical properties of polyalphaolefin oil modified with nanoadditives

Guimarey, María J.G.; Comuñas, Marı́a J. P.; López, Enriqueta R.; Fernández, Juan Manuel Vilar

doi:10.1016/j.jct.2018.10.035

Cited by 31 publications

(19 citation statements)

References 44 publications

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“…No new spectral peaks or shifts are found for the nanolubricants compared to the engine base oil, which indicates that no chemical bonds were formed. The FTIR spectrum of the engine oil corresponds to a polyalphaolefin (PAO) [24].…”

Section: Nanoparticles and Engine Oilmentioning

confidence: 99%

“…The nanolubricants with A c c e p t e d M a n u s c r i p t 11 the highest load with each type of nanoparticle have been selected to carry out the stability study, thus ensuring that the stability for lower concentrations will be equal or greater. This method was presented in our previous works [24,28]. Figure 3 shows digital images of the nanolubricants with a concentration of 0.20 wt% after different periods of preparation.…”

Section: Nanolubricants Stabilitymentioning

confidence: 99%

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Comparison between thermophysical and tribological properties of two engine lubricant additives: electrochemically exfoliated graphene and molybdenum disulfide nanoplatelets

et al. 2020

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Recently graphene and other 2D materials were suggested as nano additives to enhance the performance of nanolubricants and reducing friction and wear-related failures in moving mechanical parts. Nevertheless, up to our knowledge there are not previous studies on electrochemical exfoliated nanomaterials as lubricant additives. In this work, engine oil-based nanolubricants were developed via two-steps method using two different 2D nanomaterials: a carbon-based nano additive, graphene nanoplatelets (GNP) and a sulphide nanomaterial, molybdenum disulfide (MoS 2 ) nanoplatelets (MSNP). The influence of these nano additives on the thermophysical properties of the nanolubricants, such as viscosity index, density and wettability, was investigated. The unique features of the electrochemical exfoliated GNP and MSNP allow the formulation of nanolubricant with unusual thermophysical properties. Both the viscosity and density of the nanolubricants decreased by increasing the nanoplatelets loading. The effect of the nano additives loading and temperature on the tribological properties of nanolubricants was investigated using two different test configurations: reciprocating ball-on-plate and rotational ball-on-three-pins. The tribological specimens were analysed by Scanning Electron Microscopy (SEM) and 3D profiler in order to evaluate the wear. The results showed significant improvement in the antifriction and anti-wear properties, for the 2Dmaterials-based nanolubricants as compared with the engine oil, using different contact conditions. For the reciprocal friction tests, maximum friction and worn area reductions of 20% and 22% were achieved for the concentrations of 0.10 wt% and 0.20 wt% GNP, respectively. Besides, the best anti-wear performance was found for the nanolubricant containing 0.05 wt% MSNP in rotational configuration test, with reductions of 42% and 60% in the scar width and depth, respectively, with respect to the engine oil.

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Section: Nanoparticles and Engine Oilmentioning

confidence: 99%

Section: Nanolubricants Stabilitymentioning

confidence: 99%

Comparison between thermophysical and tribological properties of two engine lubricant additives: electrochemically exfoliated graphene and molybdenum disulfide nanoplatelets

et al. 2020

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“…Maria et al used the two‐step method to synthesize graphene/polyalphaolefin (PAO6). [ 56 ] An ultrasonic bath was used, with a continuous shaking time of 2 h and a shaking frequency of 37 kHz. Ettefaghi et al prepared nanolubricants containing various carbon nanostructures, including MWCNTs, graphene nanosheets, fullerene nanoparticles (C 60 ), and carbon nanoballs (CNBs) in SAE 20W50 engine oil, to compare and assess their impact on the properties of the oil.…”

Section: Preparation Of Nanofluidsmentioning

confidence: 99%

“…[ 121 ] Maria et al used an ultrasonic bath to prepare a graphene/PAO6 nanolubricant, with a period of 2 h and a frequency of 37 kHz. [ 56 ] The increase in the viscosity of the base fluid due to the addition of graphene nanoplatelets at 0.25 wt% was 4.8%.…”

Section: Viscositymentioning

confidence: 99%

A Review on Thermophysical Properties for Heat Transfer Enhancement of Carbon‐Based Nanolubricant

Saufi

Mamat

2021

Adv Eng Mater

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In previous years, nanolubricants have gained attention in terms of their use as heat transfer fluids in applications such as engine cooling and air conditioning. Carbon-based nanolubricants have attracted great interest due to their superior heat transfer performance. To date, the stability of a carbon-based nanolubricant is crucial if the enhanced properties are to be retained after the fabrication process. In this context, the current research aims to review the stability and thermophysical properties of carbon-based nanolubricants. Recent works on these nanolubricants are summarized herein, including the method of preparation and improvements in their properties. The factors that affect the thermal conductivity and viscosity are also discussed, and finally, the applications of nanolubricants are described. The recent studies of nanolubricants are summarized and opportunities for further improvements in their efficiency are suggested.

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“… The data are important and useful because the reuse potential of the dataset includes calculating Reynolds number for further flow studies; heat transfer performance studies of nanofluids; lubrication and lubricants’ development studies [2] , [3] , [4] , [5] and characteristics of Newtonian and non-Newtonian fluids [6] . The data can benefit engineers, researchers and scientists working in the fields of energy, thermofluids, power systems, energy storage, materials, cooling, heating and lubrication.…”

Section: Value Of the Datamentioning

confidence: 99%

Dataset for measured viscosity of Polyalpha-Olefin- boron nitride nanofluids

Sleiti

2021

Data in Brief

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Datasets of measured viscosity of Polyalpha-Olefin- boron nitride (PAO/hBN) nanofluids are reported. An AR-G2 rheometer (from TA Instruments) experimental setup is used for measuring the rheological property of PAO/hBN nanofluids, which is a combined motor and transducer (CMT) instrument. The test fluid sample size is approximately 1.5 ml and the tests were conducted over a temperature range of the tested fluids from − 20 °C to 70 °C by a water circulator chamber. The dataset includes measured viscosities as a function of the BN volumetric concentration ( ϕ ) of 0, 0.6 and 1%. Two sets of viscosity measurements are conducted insuring the thermal equilibrium conditions are reached for all experiments. In set (1), the viscosity is measured at intervals of 10 °C by fixing the temperature at each interval (at −20, −10, 0, 10, 20, 30, 40, 50, 60 and 70 °C), while the shear stress and shear rate are varied. In set (2), the temperature is varied from −20 °C to 70 °C at intervals of 0.5 °C, while the shear stress is fixed and the shear rate is varied accordingly. Set (1) is designed to verify whether the fluids are Newtonian or not and set (2) is designed to derive correlations for the viscosity as a function of temperature. Several characteristics data are recorded including rotational speed of the spindle (RPM), torque, viscosity (Pa- s), shear stress (Pa), shear strain rate (1/s) and temperature (°C). The reuse potential of the dataset includes calculating Reynolds number for further flow studies; heat transfer performance studies of nanofluids; lubrication and lubricants’ development studies and characteristics of Newtonian and non-Newtonian fluids. The dataset reported here were used (but not published) in the article published by the author in [1] ( https://doi.org/10.1016/j.csite.2020.100776 ).

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Thermophysical properties of polyalphaolefin oil modified with nanoadditives

Cited by 31 publications

References 44 publications

Comparison between thermophysical and tribological properties of two engine lubricant additives: electrochemically exfoliated graphene and molybdenum disulfide nanoplatelets

Comparison between thermophysical and tribological properties of two engine lubricant additives: electrochemically exfoliated graphene and molybdenum disulfide nanoplatelets

A Review on Thermophysical Properties for Heat Transfer Enhancement of Carbon‐Based Nanolubricant

Dataset for measured viscosity of Polyalpha-Olefin- boron nitride nanofluids

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