The effect of MWCNTs/GNs hybrid addition on the tribological and rheological properties of lubricating engine oil

Kamel, Bahaa M.; El-Kashif, Emad; Hoziefa, W.; Shiba, Mohamed S.; Elshalakany, Abou Bakr

doi:10.1080/01932691.2020.1789470

Cited by 26 publications

(13 citation statements)

References 34 publications

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“…A friction reduction of the tribo-pair by 20% was reported by mixing oleic acid and ZnO nanoparticle in the base fluid (Gara and Zou, 2013). Other researchers also reported that a friction reduction of 46.6% was achieved by addition of SiO2/MoS2 hybrid nanoparticles into the base oil (Xie et al, 2018) whereas 48% friction reduction was achieved by mixing 15W50 base oil with multi-wall carbon nanotube and graphene nanosheets nanoparticles (Kamel et al, 2021).…”

Section: Friction Coefficientmentioning

confidence: 99%

“…For example, multi-walled carbon nanotube and graphene added in the base oil improved the wear scar dimension by 48% (Kamel et al, 2021) while SiO 2 /MoS 2 hybrid nanoparticles in the base oil gave 50.5% wear volume reduction (Xie et al, 2018). When incorporated in the cutting fluid, hybrid alumina/graphene nanoparticles can also reduce the flank wear by 12.29% (Sharma et al, 2018).…”

Section: Wear Analysismentioning

confidence: 99%

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Effect of Graphene Nanoplatelets on Tribological Properties of Bacterial Cellulose/Polyolester Oil Bio-Lubricant

et al. 2022

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The demand for bio-degradable lubricants is continuously increasing due to environmental concerns. One of the methods to achieve the bio-degradability property of lubricants is by using nanoparticles from bio-resources as additives in bio-degradable oils. Among the nanomaterials are nanofibers, cellulose, and graphene nanoplatelets. They can be mixed in Polyolester (POE) oil to produce lubricants for tribological applications. In a previous study, it has been confirmed that friction and wear of the tribo-pair reduced from 5 to 10% by mixing various volume percentages of bacterial cellulose (BC) into PEO as the base lubricant. The tribological performance BC containing POE base lubricant can further be enhanced by incorporating graphene nanoplatelets. This study shows that the specific wear rate of the material decreased by 20% by adding graphene nanoplatelets in BC containing POE oil. The friction and wear improvement can be related to the formation of tribofilm on the contact interface. EDS analysis indicates that oxygen played an important role in the friction and wear performance of the POE oil-based lubricant with BC and graphene additives. The tribofilm shows significant traces of oxygen elements. The presence of graphene nanoplatelets in POE oil removed the oxygen-rich layer but could not reduce the wear rate. However, incorporating both graphene and BC in POE oil significantly improved friction and wear, although the oxygen element was still traceable on the contact interface.

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Section: Friction Coefficientmentioning

confidence: 99%

Section: Wear Analysismentioning

confidence: 99%

Effect of Graphene Nanoplatelets on Tribological Properties of Bacterial Cellulose/Polyolester Oil Bio-Lubricant

et al. 2022

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“…It began by dissolving the N, N-dimethylformamide (DNF) in the GNs (DMF). For 45 min, the nanoparticles were dispersed in a new way to avoid accumulation, as suggested in previous studies [22][23][24][25], with a DMF concentration of 3% by weight. A SCILOGEX D500 homogenizer was used to homogenize the mixture without agglomeration.…”

Section: Nanolubricant Processing and Testing Equipmentmentioning

confidence: 99%

“…However, the differences between the kinds of additive particles used and types of oils used and the comparison between the obtained tribological properties are considered. According to the published manuscripts, different nanoparticles have been used, such as CNTs, mixing individually with biodiesel oil [37,38]; on the other hand, dual CNTs and GNs have been added to SAE [23]. The coefficient of friction and WSD with individual CNTs with biodiesel and engine oil was the highest at a content of 0.06 wt.% and 0.09 wt.%, respectively.…”

Section: Comparison Between Present Work and Previous Workmentioning

confidence: 99%

Tribological Performance and Rheological Properties of Engine Oil with Graphene Nano-Additives

et al. 2022

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Nanoparticles dispersed in lubricants are being studied for their ability to reduce friction and wear. This paper examines SAE 5W-30 oil enhanced with dispersed graphene nanoplates for tribological and rheological properties. Graphene nanoplate (GNs) concentration effects on the rheological and tribological properties of 5W-30 base oil (0.03, 0.06, 0.09, 0.12, and 0.15 wt percent) were tested. Under various loads, a four-ball testing model was used to conduct a tribological analysis (200, 400, 600, and 800 N). Kinematic viscosity is calculated, and base oil and nanofluid-added 5W30 lubricant are compared for thermal conductivity and flashpoint. Wear scar and coefficient of friction improved by 15% and 33% with nano-additives. When related to the base oil, the flashpoint, thermal conductivity, kinematic viscosity, and pour point all increased, by 25.4%, 77.4%, 29.9%, and 35.4%, respectively. The addition of GNs improved the properties of 5W30 engine oil.

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“…Generally, it is a suspension of solid particles in a base fluid that can enhance the properties of the original fluid [1]. Nanolubricant has been applied in many systems such as refrigerators [2], air conditioning [3], automobile engines [4], and hydraulic systems [5].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Preparation Methods Effect on the Stability of Compressor oil-based Nanolubricant

Ismail

Azmi²,

Mamat³

2022

ARAM

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The stability evaluation for a nanolubricant is important before any application to a system. The production of nanolubricant can be done using the various method. This study aims to compare the effect of nanolubricant stability on the different preparation methods. The TiO2 nanolubricant with compressor oil base was prepared using a high-speed homogenizer (HSH) and ultrasonic bath. The HSH speed was varies between 5000 and 15000 rpm while the sonication period was varied from one hour to 5-hours. Visual observation and UV-Vis spectrophotometer method were used to evaluate the nanolubricant stability. Results reveal that the UV-Vis method produces better stability for TiO2 nanolubricant than HSH. The 5-hours ultrasonic shows the best result with a 0.9 concentration ratio after 15 days of preparation. The HSH shows that the 15000 rpm nanolubricant have better stability than the lower speed. The stability of nanolubricant increase by the increment of HSH speed as well as ultrasonication periods. The ultrasonic bath with a 5-hours sonication time is recommended for TiO2 as it provides the best stability.

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The effect of MWCNTs/GNs hybrid addition on the tribological and rheological properties of lubricating engine oil

Cited by 26 publications

References 34 publications

Effect of Graphene Nanoplatelets on Tribological Properties of Bacterial Cellulose/Polyolester Oil Bio-Lubricant

Effect of Graphene Nanoplatelets on Tribological Properties of Bacterial Cellulose/Polyolester Oil Bio-Lubricant

Tribological Performance and Rheological Properties of Engine Oil with Graphene Nano-Additives

Comparison of Preparation Methods Effect on the Stability of Compressor oil-based Nanolubricant

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