Novel insights into graphene-based sustainable liquid lubricant additives: A comprehensive review

Dhanola, Anil; Gajrani, Kishor Kumar

doi:10.1016/j.molliq.2023.122523

Cited by 29 publications

(6 citation statements)

References 171 publications

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“…5–7 Lubricants reduce tribological problems in a variety of ways, such as overcoming sliding friction pair contact caused by severe or frequent metal-to-metal interactions, forming low-shear and durable boundary friction optimized films at the interface, and so on. 8 Additives are an important part of lubricants. Additives with anti-friction, anti-wear, anti-oxidation, regulating viscosity and other functions can effectively improve the performance of the base oil after adding them in the base oil.…”

Section: Introductionmentioning

confidence: 99%

Recent advances in metal–organic frameworks for lubrication

Wang,

Zhou,

Cao

et al. 2024

Mol. Syst. Des. Eng.

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Section: Introductionmentioning

confidence: 99%

Recent advances in metal–organic frameworks for lubrication

Wang,

Zhou,

Cao

et al. 2024

Mol. Syst. Des. Eng.

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“…Nanomaterials [41], such as activated carbon nanoparticles [42], boron nitride, carbon nanotubes, graphene, and its oxide [43,44], are considered as more eco-friendly anti-wear (AW) and extreme pressure (EP) additives to lubricants. Furthermore, toxic functional groups in synthetic oils were found to be effectively removed using biochar as an antioxidant agent [45].…”

Section: Introductionmentioning

confidence: 99%

Tribological and Chemical–Physical Behavior of a Novel Palm Grease Blended with Zinc Oxide and Reduced Graphene Oxide Nano-Additives

Nassef,

Hassan

et al. 2024

Lubricants

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The role of industrial lubricants in machinery is to reduce friction and wear between moving components. Due to the United Nations’ tendency to reduce dependency on fossil fuel, a general awareness is strongly driven towards developing more eco-friendly lubricants. Palm oil possesses promising properties, which promote it to be a competitive alternative to the hostile mineral oils. Still, marginal oxidation stability, viscosity, and tribological properties remain critical issues for performance improvement. This paper presents an improved palm grease using reduced graphene oxide (rGO) and zinc oxide (ZnO) nano-additives at different concentrations. Oil and grease samples were tested for viscosity, oxidation stability, pour point, penetration, roll stability, dropping point, churned grease-oil release, copper corrosion, friction, and wear. ZnO additives enhanced the oxidation stability by 60% and shifted the pour point to 6 °C. Adding ZnO and rGO to the palm grease increased the load-carrying capacity between 30% and 60%, respectively, and reduced the friction coefficient by up to 60%. From the wear scar morphologies, it is believed that graphene 2D nanoparticles formed absorption layers which contributed to the increase in load-carrying capacity, while ZnO chemically reacted with the metallic surface layer, forming zinc compounds that resulted in a protective boundary lubricating film.

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“…Graphene, a two-dimensional carbon nanomaterial with excellent mechanical and electrical properties, has emerged as a promising candidate for lubricant enhancement. [4][5][6] Its two-dimensional structure, composed of carbon atoms arranged in a hexagonal lattice, exhibits extraordinary strength and high surface area, making it an intriguing candidate for enhancing lubrication systems. Moreover, graphene's exceptional lubricating properties, such as low friction coefficient, high load-carrying, and excellent wear resistance have garnered significant interest in the tribology community.…”

Section: Introductionmentioning

confidence: 99%

Lubricity performance of hydrogen-free CVD growth of graphene on copper particles as an additive in paraffin base oil

Rahman,

Amiruddin,

Abdollah

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part J:

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This study aims to examine the impact of carbon precursor materials, which are oil palm fiber (OPF) and waste polystyrene (PS), on friction and wear properties of paraffin base oil added with graphene-coated copper (Cu) additive. The graphene was synthesized on Cu particles via hydrogen-free chemical vapor deposition method. The graphene was characterized using Raman spectroscopy and transmission electron microscopy. The lubricity properties of 0.6 wt.% of synthesized graphene-coated Cu additive in paraffin base oil was analyzed based on its tribological behavior using a four-ball tribometer. From the quantitative and qualitative characterization analysis, graphene-coated Cu additive synthesized using 50 wt.% OPF carbon precursors has a good-quality graphene with minimal defects and a well-ordered lattice structure. From the tribological analysis, the paraffin base oil added with graphene-coated Cu additive synthesized using 50 wt.% OPF carbon precursor has the lowest coefficient of friction of 0.07 and wear rate of 1.6 × 10−5 mm3/min. Hence, it can be suggested that incorporating graphene-coated Cu particles, synthesized from a 50 wt.% OPF carbon precursor, into base oil shows great potential as an environmentally friendly additive, particularly in terms of enhancing lubrication performance.

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Novel insights into graphene-based sustainable liquid lubricant additives: A comprehensive review

Cited by 29 publications

References 171 publications

Recent advances in metal–organic frameworks for lubrication

Recent advances in metal–organic frameworks for lubrication

Tribological and Chemical–Physical Behavior of a Novel Palm Grease Blended with Zinc Oxide and Reduced Graphene Oxide Nano-Additives

Lubricity performance of hydrogen-free CVD growth of graphene on copper particles as an additive in paraffin base oil

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