Preparation of graphite nanosheets in different solvents by sand milling and their enhancement on tribological properties of lithium-based grease

Jin, Zhang; Wang, Aili; Yin, Hengbo

doi:10.1016/j.cjche.2020.01.013

Cited by 12 publications

(4 citation statements)

References 30 publications

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“…The high bond energy of carbon-carbon atoms in Graphite crystal makes it strong, but the van der Waals force between layers is fragile. This unique laminar structure makes it resistant to load and has good slips between layers [7][8][9]. With the continuous improvement of nanometer lubrication technology, nanometer Graphite as a lubricant additive has gradually entered the eld of vision of researchers.…”

Section: Introductionmentioning

confidence: 99%

“…With the continuous improvement of nanometer lubrication technology, nanometer Graphite as a lubricant additive has gradually entered the eld of vision of researchers. Using expanded Graphite, Zhang Jing [7] et al obtained nano-ake Graphite by grinding in a solvent such as absolute ethanol, glycerol, and water. It was found that the nano-Graphite sheets prepared by absolute ethanol could better enhance the lubrication, anti-wear, and extreme pressure properties of the Li-based lipids.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Modified Nano Graphite on Conductivity and Lubrication of Environment-Friendly Lithium Grease

Xia

Yang

Jia

et al. 2023

Preprint

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An environment-friendly lithium complex grease was prepared using pentaerythritol ester as base oil, lithium compound soap as thickener, and Graphite modified by ionic liquid of different chain lengths as a lubricating additive. The dropping point, corrosion of the grease, and volume resistance were tested. MFT-R4000 high-speed reciprocating friction and wear tester was used to measure the tribological properties under current-carrying and non-carrying currents. A scanning electron microscope (SEM) and photoelectron spectroscopy (XPS) were used to observe the surface of the wear scar. The results show that the polyether base oil OSP680 grease has the best degradation ability and the strongest environmental protection ability. The modified nano-Graphite material can improve the wear resistance of the base grease and the conductivity of the base grease. Ionic liquid has a synergistic effect with nano-Graphite.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Modified Nano Graphite on Conductivity and Lubrication of Environment-Friendly Lithium Grease

Xia

Yang

Jia

et al. 2023

Preprint

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“…Ball milling has been used extensively in research involving graphite deagglomeration, delamination, and size reduction. − Studies have also used bead milling for graphite delamination to produce graphene , and graphite particle size reduction . However, the bead milling process should be able to utilize graphite scrap at high-concentration milling to be a comparable process to ball milling on an industrial scale, although information concerning the use of bead milling in high-graphite-concentration milling on a large production remains limited.…”

Section: Introductionmentioning

confidence: 99%

Ultrafine Graphite Scrap and Carbon Blocks Prepared by High-Solid-Loading Bead Milling and Conventional Ball Milling: A Comparative Assessment

Amnatsin,

Kanlayakan,

Lhosupasirirat

et al. 2023

ACS Omega

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A comparison between the physical characteristics of graphite ultrafine particles and the properties of graphite blocks prepared from graphite scrap using bead and conventional ball milling techniques is presented. Industrial-scale bead milling was used to prepare graphite scrap with an initial particle size d 50 of 24 μm in the ultrafine range of <10 μm. Bead milling can significantly reduce the production time of ultrafine graphite from graphite scrap from 72 h by ball milling to 10 min. Ultrafine graphite scrap prepared from both ball milling and bead milling yields particles with a similar morphology, with a minor difference in crystalline size L a and stacking height L c observed. Carbon blocks were fabricated from both techniques, yielding carbon blocks with an almost identical microstructure and block density. Blocks from bead milling have slightly higher flexural strength as well as comparable hardness and resistivity. The block’s flexural strength, hardness, and resistivity were 68.37 MPa, 99, and 36.9 μΩ·m, respectively, in a bead-milled carbon block and 61.86 MPa, 95.5, and 38.6 μΩ·m, respectively, for a ball-milled carbon block. Bead milling can be applied for the preparation of ultrafine graphite particles and graphite blocks with production that is 9 times faster for the same ultrafine graphite particle output and final product quality.

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“…After adding FLG, the main components of the boundary film become Fe 2 O 3 and adsorbed FLG. Jin Zhang et al [20] found through research that, compared with pure lithium grease with an FLG content of 2 wt%, the average friction coefficient is reduced by 27%, and the solder joint and load wear index are 1.6 and 1.4 times that of pure lithium grease, respectively. Tiancheng Ouyang et al [21] found that the addition of FLG can significantly improve the anti-friction and anti-wear ability of the grease, thereby making the wear surface smoother.…”

Section: Introductionmentioning

confidence: 99%

Rheological and Frictional Properties of Lithium Complex Grease with Graphene Additives

et al. 2022

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Few-layer graphene (FLG) was added as a nano-additive to lithium complex grease (LCG) to explore the influence of FLG on the microstructure, viscoelasticity, friction and wear properties of LCG. Studies have found that the addition of FLG makes the microstructure of the thickener more compact, which in turn leads to an increase in the viscoelasticity of LCG. FLG additives can improve the viscosity-temperature properties of the grease and change the elastic deformation response to temperature changes. Among the temperatures selected in this article, the effect of graphene is more obvious at 70 °C. During the friction process, a proper amount of FLG can quickly form a boundary film and is not easily damaged, thereby optimizing the friction and wear performance of LCG.

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Preparation of graphite nanosheets in different solvents by sand milling and their enhancement on tribological properties of lithium-based grease

Cited by 12 publications

References 30 publications

Effect of Modified Nano Graphite on Conductivity and Lubrication of Environment-Friendly Lithium Grease

Effect of Modified Nano Graphite on Conductivity and Lubrication of Environment-Friendly Lithium Grease

Ultrafine Graphite Scrap and Carbon Blocks Prepared by High-Solid-Loading Bead Milling and Conventional Ball Milling: A Comparative Assessment

Rheological and Frictional Properties of Lithium Complex Grease with Graphene Additives

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