Evaluation of boron nitride particles on the tribological performance of avocado and canola oil for energy conservation and sustainability

Reeves, Carlton J.; Menezes, Pradeep L.

doi:10.1007/s00170-016-9354-1

Cited by 60 publications

(38 citation statements)

References 34 publications

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“…It can be speculated that higher the C18:1 (oleic acid) thicker protective monolayer to lower wear and friction. 32 Reeves et al. 32 examined the effect of fatty acid structure on friction and wear behavior of different vegetable oils.…”

Section: Resultsmentioning

confidence: 99%

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Antiwear and extreme pressure performance of castor oil with nano-additives

Gupta

Harsha

2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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The aim of the present study is to examine the antiwear, antifriction, and extreme pressure performance of castor oil with nano-additives by using a four-ball tester. CeO2 (≈90 nm) and polytetrafluroethylene (≈150 nm) nanoparticles were used as an additive in castor oil with four different concentrations in the range of 0.1–1.0% w/v. The suspension stability of the nanoparticles was improved by using sodium dodecyl sulfate as a dispersant. Different analytical tools were used to characterize the nanoparticles parameter (i.e. shape and size) as well as the worn surfaces. The additive concentration was optimized on the basis of tribological performance. The test results of antiwear and extreme pressure property have been reported on the basis of wear scar diameter and weld load, respectively. For the antiwear test, it was observed that the maximum reduction in the wear scar diameter was 37.4 and 35.3% at an optimum concentration of CeO2 and polytetrafluroethylene additive, respectively. Also, antifriction and load carrying properties of castor oil were significantly improved with the addition of nanoparticles as an additive in a small amount. The mechanism for such improvement in the tribological behavior has also been discussed.

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Section: Resultsmentioning

confidence: 99%

“…32 Reeves et al. 32 examined the effect of fatty acid structure on friction and wear behavior of different vegetable oils. They found that the vegetable oils with dominant C18:1 (oleic and ricinoleic acid) have a tendency to form a denser monolayer that adsorbed at the interface to protect the mating surfaces.…”

Section: Resultsmentioning

confidence: 99%

Antiwear and extreme pressure performance of castor oil with nano-additives

Gupta

Harsha

2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…On average, aggregates are larger than the mean roughness in the contact area (see Figure 5). The aggregates actuate as a supporting filling media minimizing the direct contact between the asperities, also lead to sliding friction [56][57][58] and create a superior protective transfer film [19]. All these mechanisms lead to an overall decrease of friction and wear.…”

Section: Tribological Characterizationmentioning

confidence: 99%

“…Wan et al [16] studied nanolubricants composed of a formulated oil 15W-40, a dispersant, and h-BN nanoparticles (disks with average diameter of 120 nm and a single layer thickness of around 30 nm), finding that the nanolubricants with low nanoparticle concentrations significantly improved the anti-friction and anti-wear properties of the base oil. Reeves et al [17][18][19] studied the effect of particle size on friction and wear using canola or avocado oils containing nanometer-, submicron-, and micron-sized h-BN particulate additives, finding that the nano-sized particles showed the best tribological performance. Charoo et al [20] concluded that the use of h-BN nanoparticles (mean size 50 nm) as additives in SAE 20W-50 oil greatly increased the anti-friction and anti-wear properties of the lubricant.…”

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confidence: 99%

Tribological and Thermophysical Properties of Environmentally-Friendly Lubricants Based on Trimethylolpropane Trioleate with Hexagonal Boron Nitride Nanoparticles as an Additive

et al. 2019

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Dispersions based on hexagonal boron nitride, h-BN, nanoparticles, at 0.50, 0.75 and 1.0 wt.% mass concentrations, in an ester base oil composed mainly of trimethylolpropane trioleate, were investigated as potential nanolubricants. The stability of the dispersions was assessed to determine the reliability of the tribological, thermophysical and rheological measurements. Density and viscosity were measured from 278.15 to 373.15 K, while rheological behavior was analyzed at shear rates from 1 to 1000 s −1 at 283.15 K. Newtonian behavior was exhibited by all nanolubricants at the explored conditions, with the exception of the highest concentration at the lowest shear rates, where possible non-Newtonian behavior was observed. Tribological tests were performed under a normal load of 2.5 N. Wear was evaluated by means of a 3D profiler, scanning electron microscopy and confocal Raman microscopy. The best tribological performance was achieved by the 0.75 wt.% nanolubricant, with reductions of 25% in the friction coefficient, 9% in the scar width, 14% in the scar depth, and 22% of the transversal area, all with respect to the neat oil. It was observed that physical protective tribofilms are created between rubbing surfaces.Coatings 2019, 9, 509 2 of 17 relatively weak van der Waals interactions between loosely stacked h-BN sheets that provide excellent lubrication characteristics [9]. h-BN, the softest and most lubricious polymorph of BN, has both high thermal stability and thermal conductivity as well as numerous industrial applications, especially in metalworking processes where cleanliness of the working environment is required [10][11][12]. Additionally, h-BN is an environmentally-friendly material [13], which is being studied as a nanoadditive for liquid lubricants [14-22] because, compared with solid lubricants, liquid lubricant additives present advantages such as faster entrance and replenishment of the sliding interface, and easier removal of wear debris from the contact zone [23].With respect to the tribological behavior of nanolubricants containing h-BN nanoparticles, Mosleh et al. [14] found that when nanoparticles of h-BN, with irregular flake-like shapes and an average size of 70 nm, were dispersed in commercial sheet metal forming fluids, the friction coefficient for titanium-steel pairs showed little or no improvement; nevertheless, the wear reduction using the 1 wt.% h-BN nanodispersion was 55%. Çelik et al. [15] found that an engine oil (Society of Automotive Engineers (SAE) 10 W) containing h-BN nanoparticles of disk-like shape with an average diameter of 114 nm and thickness of 30-70 nm, led to a 14.4% improvement in the friction coefficient and a 65% decrease in the wear rate with respect to the neat oil for an AISI 4140 steel material. Wan et al. [16] studied nanolubricants composed of a formulated oil 15W-40, a dispersant, and h-BN nanoparticles (disks with average diameter of 120 nm and a single layer thickness of around 30 nm), finding that the nanolubricants with low nanoparticle concentrations s...

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“…As an excellent additive for lubricating oils, h‐BN can significantly improve the fiction‐reducing and antiwear properties. Until now, many studies on the lubrication performances of h‐BN have been reported . Çelik et al prepared h‐BN particles using a special process and investigated the tribological behaviors of the h‐BN particles as additive in the engine oil.…”

Section: Introductionmentioning

confidence: 99%

Covalent Functionalized Boron Nitride Nanosheets as Efficient Lubricant Oil Additives

Wang

Han

et al. 2019

Adv Materials Inter

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Hexagonal boron nitride nanosheets (h‐BNNSs) are obtained by a chemical exfoliation method from bulk h‐BN powders. The surface of h‐BNNSs is functionalized with 3‐aminopropyltriethoxysilane (APTS). Further, the amino functional groups on the surface of APTS‐modified h‐BNNSs (APTS‐BNNSs) are reacted with 4‐carboxyphenylboronic acid (CPBA) to obtain the covalently linked CPBA‐BNNSs. The morphology and structure of h‐BNNSs, APTS‐BNNSs, and CPBA‐BNNSs are comprehensively discussed. Of all the above four additives, the CPBA‐BNNSs can most outstandingly improve friction‐reducing and antiwear capacities of 150N base oil. The CPBA‐BNNSs possess excellent dispersion stability in base oil due to the phenylboronic acid groups on the surface of h‐BNNSs. Only 0.075 wt% CPBA‐BNNSs is added into the base oil, the coefficient of friction is decreased by 32.3%, and the wear scar diameter and mean wear volume of the rubbing surface are reduced by 42.9% and 88.4%. The analysis of the worn scar surface demonstrates that CPBA‐BNNSs can form a protective tribofilm containing boron and nitrogen elements on the rubbing surfaces, thereby decreasing the friction and protecting the surfaces from wear. Thus, the CPBA‐BNNSs may be recommended as a potential lubricant additive in practical applications.

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Evaluation of boron nitride particles on the tribological performance of avocado and canola oil for energy conservation and sustainability

Cited by 60 publications

References 34 publications

Antiwear and extreme pressure performance of castor oil with nano-additives

Antiwear and extreme pressure performance of castor oil with nano-additives

Tribological and Thermophysical Properties of Environmentally-Friendly Lubricants Based on Trimethylolpropane Trioleate with Hexagonal Boron Nitride Nanoparticles as an Additive

Covalent Functionalized Boron Nitride Nanosheets as Efficient Lubricant Oil Additives

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