The tribological performance evaluation of steel-steel contact surface lubricated by polyalphaolefins containing surfactant-modified hybrid MoS2/h-BN nano-additives

Jiang, Hua; Hou, Xiaofan; Ma, Yuxin; Su, Da; Qian, Yucong; Ali, Mohamed Kamal Ahmed; Dearn, Karl D.

doi:10.1016/j.wear.2022.204426

Cited by 18 publications

(16 citation statements)

References 39 publications

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“…They investigate the effects of oleic acid surfactant with various concentration using four ball tester. According to the study, the tribo-film that forms on the surface of the tribo-pair gives hybrid nano lubricants outstanding tribological capabilities (Jiang et al , 2022).…”

Section: Introductionmentioning

confidence: 99%

Effect of polymer additives on the tribological performance of soybean oil

Guru,

Venugopal,

Sarangi

2023

ILT

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Purpose This study aims to investigate the behavior of vegetable oil with two additives. Base oil’s tribological qualities can be improved with the help of several additions. In the present investigation, soybean oil is served as the foundational oil due to its eco-friendliness and status as a vegetable oil with two additives, named polytetrafluoroethylene (PTFE) and molybdenum disulfide (MoS2). Design/methodology/approach As additives, PTFE and MoS2 are used; PTFE is renowned for its anti-friction (AF) properties, while MoS2 is a solid lubricant with anti-wear (AW) properties. This investigation examines the synergistic impact of AF and AW additions in vegetable oil. The lubricity of the base oil is measured by using a four-ball tester, and the wear properties of the oil at different additive amounts are determined by using a universal tribometer. Findings PTFE (at 5 Wt.%) and MoS2 (at 1 Wt.%) were found to improve the tribological performance of the base oil. The weld load is significantly increased when 5 Wt.% of PTFE + MoS2 is added to the base oil. Originality/value A better tribological characteristic can be achieved by combining additives that amount to less than 1% of the base oil. In experiments with highly concentrated MoS2, the adequate pressure improved dramatically, but the lubricant’s tribological characteristics did not. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-11-2022-0321/

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Section: Introductionmentioning

confidence: 99%

Effect of polymer additives on the tribological performance of soybean oil

Guru,

Venugopal,

Sarangi

2023

ILT

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“…As a new nanomaterial, molybdenum disulfide (MoS 2 ) has attracted great attention since its discovery . Because of its excellent properties, such as exhibiting low shear resistance, promoting interlayer slip, and reducing interfacial friction, it is among the excellent candidates for liquid lubrication of mechanical moving parts. , By virtue of its excellent properties, scholars have been studying the potential applications of using MoS 2 as a lubricant additive and reporting breakthroughs in the field of lubrication. − Regrettably, MoS 2 also has some weaknesses, with strong van der Waals force interactions among the layers that lead to interlayer aggregation, which limits its interlayer slip, and difficulty in dispersion in the base oil, thus hindering the lubrication and wear resistance of MoS 2. , To overcome the limitations of single lubricant additives in fluid lubrication, the help of dispersants, grafting of surfactants, and other techniques are the basic steps used to improve the dispersion stability of MoS 2 in a fluid medium. ,,, Correspondingly, Kumari et al introduced a method of grafting octadecyl amines at the structural defects of MoS 2 nanosheets as high-performance lubricant additives, which can make the grafting process have more affinity and fully exploit its properties in the field of lubrication.…”

Section: Introductionmentioning

confidence: 99%

Alkylamine-Grafted Molybdenum Disulfide Nanosheets for Enhanced Dispersion Stability and Lubricity Properties

Wang,

Yang,

Bai

et al. 2023

Langmuir

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The unique structure and ultralow interlayer shear strength give molybdenum disulfide (MoS2) materials a broad prospect for energy savings, economic benefits, and extended operating life of lubrication systems. Herein, we prepared an effective integration strategy to prepare novel small-sized and chemically grafted MoS2 to solve the problems of poor dispersibility and easy agglomeration of MoS2. The MoS2 powder was stripped and oxidized to generate active centers using acid oxidation and high-speed ultrasonic crushing to obtain two different types of alkylamine chemically, covalently grafted, oxidized MoS2 nanosheets as lubricant additives to achieve friction reduction and antiwear. The chemical changes and structural characteristics of different types of alkylamine molecules upon covalent interaction with oxidized MoS2 were investigated in detail by FTIR, XPS, TGA, XRD, and TEM analyses. The results showed that the alkylamine-grafted MoS2 oxide nanosheets had good dispersion in 15# industrial white oil, and friction experiments confirmed that the alkylamine-grafted MoS2 oxide (MoS2–O-OLA) nanosheets exhibited better friction and wear resistance such that, compared with pure 15# industrial white oil, the 0.02 wt % MoS2–O-OLA nanosheets could significantly reduce friction (36.2%) and wear (22.4%). The field-emission scanning electron microscopy (FESEM) and EDS analyses of the wear surface showed that MoS2–O-OLA nanosheets play an important role in improving tribological properties by generating interlayer slippage at the steel ball contact interface, thereby forming surface protection and a uniform oil film.

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“…In order to improve the friction reduction and wear resistance properties of ceramic tribocomponents, techniques such as water-based lubricant additives, − surface texturing, , coatings, − as well as composite ceramics − are reported in recent years. Particularly, the addition of nanoparticles − is one of the most effective approaches because of the improvement of viscosity and the synergetic effect of nanoparticles. Among the variety of nanoparticles, graphene has been paid considerable attention owing to its remarkable lubricity. − For instance, graphene-enhanced nanofluids were synthesized by Liang et al and experimental results demonstrated that FC and wear were significantly reduced by 81.3 and 61.8%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Silver/Graphene Nanocomposite as an Additive for Aqueous Lubrication

Wang

Zhang

et al. 2023

ACS Appl. Nano Mater.

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From the perspective of economic and environmental protection, water-based lubrication is one of the most promising technologies. However, the weak lubricity of water impedes its wide application in the ceramic bearing industry. Herein, a silver/graphene nanocomposite (SGN), as an additive with good dispersity in water, was synthesized through electrostatic adsorption and in situ reduction after preparing the sulfonated graphene oxide. It was found that the tribological performance of ceramic components was significantly improved with the addition of the SGN in water. The experimental results indicated that a 0.2 wt % SGN aqueous solution contributed toward 52.2 and 54.2% of improvement in friction reduction and wear resistance, respectively, at 150 rpm and 3 N. In addition, frictional tests at a long duration of 3600 s were carried out to investigate the lubrication of the mechanism. The worn surface analysis demonstrated that the collapsed Ag nanoparticles adhered to the rubbing surface to produce a protective coating and repair worn surfaces. The superior lubricity of the SGN might be attributed to the synergistic effects of rolling of Ag nanoparticles and interlayer shearing of graphene, which worked at interfaces between components during sliding.

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The tribological performance evaluation of steel-steel contact surface lubricated by polyalphaolefins containing surfactant-modified hybrid MoS2/h-BN nano-additives

Cited by 18 publications

References 39 publications

Effect of polymer additives on the tribological performance of soybean oil

Effect of polymer additives on the tribological performance of soybean oil

Alkylamine-Grafted Molybdenum Disulfide Nanosheets for Enhanced Dispersion Stability and Lubricity Properties

Silver/Graphene Nanocomposite as an Additive for Aqueous Lubrication

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