Rheological and Frictional Properties of Lithium Complex Grease with Graphene Additives

Wang, Yanshuang; Gao, Xudong; Lin, Jianghai; Zhang, Pu

doi:10.3390/lubricants10040057

Cited by 13 publications

(12 citation statements)

References 29 publications

(30 reference statements)

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“…G″ represents the energy lost in the form of heat when a grease is sheared or stressed. 37 It can be found from Figure 5b that the G″ of castor oil is much larger than G′ in the temperature range of 20−80 °C, indicating that the material mainly undergoes viscous deformation, which means the material is liquid. For the oleogel, G′ and G″ were close to each other.…”

Section: Acs Sustainable Chemistry and Engineeringmentioning

confidence: 99%

Facile Synthesis of Lignin-Castor Oil-Based Oleogels as Green Lubricating Greases with Excellent Lubricating and Antioxidation Properties

Wu,

Thoresen,

Matsakas

et al. 2023

ACS Sustainable Chem. Eng.

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In this study, a facile synthesis method was employed to create lignin-castor oil-based oleogels by modifying organic lignin with two silane coupling agents. The resulting oleogels demonstrated outstanding lubricating and antioxidation properties, establishing them as promising green lubricating greases. Compared with the pure castor oil, the oxidation induction time (OIT) value of the synthesized oleogels was significantly increased from 20 s (pure castor oil) to 1959 s (oleogel with 20 wt % lignin), indicating an effective improvement of the oxidation resistance. The steel contacts lubricated by the synthesized oleogel also had lower wear than those lubricated by pure castor oil, signifying the better lubricating properties of oleogels. The oleogel with 20 wt % lignin showed the lowest wear, which was around 64% lower than that of pure castor oil. The exceptional performance and environmentally sustainable composition of these oleogels, with the biomass content exceeding 80%, allow them to be used as green lubricating greases for industrial applications. Overall, this study provides valuable insights into the development of high-performance, eco-friendly lubricants.

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Section: Acs Sustainable Chemistry and Engineeringmentioning

confidence: 99%

Facile Synthesis of Lignin-Castor Oil-Based Oleogels as Green Lubricating Greases with Excellent Lubricating and Antioxidation Properties

Wu,

Thoresen,

Matsakas

et al. 2023

ACS Sustainable Chem. Eng.

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“…Jiusheng et al prepared novel nanomagnetic grease that exhibited favorable lubricating properties; they also analyzed the interaction between the magnetic grease and the original grease to determine the mechanism by which the magnetic grease provided lubrication. The antiwear and EP properties of the greases were improved massively in some cases. ,,− …”

Section: Introductionmentioning

confidence: 99%

“…Greases are widely recognized as excellent lubricants due to their efficient lubrication and ability to reduce the wear and friction between surfaces. Different types of greases, such as lithium grease, calcium grease, and Bentone grease, are utilized in mechanical applications based on specific needs and conditions. − Recent innovations in the field include nanoparticles, which have distinct properties compared with bulk materials. Nanoparticles can be synthesized through mechanical or chemical processes.…”

Section: Introductionmentioning

confidence: 99%

Tribological Performance Evaluation of Greases on a Four-Ball Tester with Graphene Oxide Nanoparticles

Singh,

Saini,

Matharu

et al. 2023

ACS Omega

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Conventional greases have an exceptional place in the field of lubrication. They are unique in the sense of their areas of application and are very difficult to replace with other lubricating substances for the same reason. The advancements in the field of nanoparticles and the results they provide as an additive in greases have great scientific interest as they improve the tribological properties of greases to a great extent. The current work's aim is to synthesize a nanogripe using graphene oxide (GO) nanoparticles to lithium grease (Li grease), which will increase the tribological properties of the plain Li grease. Steps were taken to investigate the impact of variation of load on the frictional and wear characteristics of nanogrease. Synthesis of nanogrease and tribological evaluation were performed with a magnetic stirrer with a hot plate and a four-ball tester. Results indicated that nanogrease exhibits better tribological properties. It is also found that the antiwear and frictional properties of grease are not proportional to the wt % of GO nanoparticles. It is also detected that with the increase in load, the tribological properties of nanogrease increase.

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“…Lubrication oils, plastic greases and solid lubricants can be distinguished. Currently, there is a tendency to replace lubricating oils and plastic greases with solid lubricants [ 6 , 7 , 8 , 9 , 10 ]. Oils and plastic greases can pose a serious problem in some applications, for example, at high temperatures, when they may evaporate.…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of Cu-MoS2-WS2-Ag-CNT Sintered Composite Materials

et al. 2022

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In this work, in order to produce Cu-MoS2-WS2-Ag-CNT self-lubricating materials, powder metallurgy was used. Several different compositions containing single solid lubricant MoS2, WS2, Ag and CNTs as well as multi-component lubricants in the copper matrix were prepared. Friction and wear tests were carried out using the pin-on-disc method at room temperature. Light microscopy (LM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) were used to characterize the wear mechanism of sintered materials. The tribofilm on the worn surfaces of sintered materials and counter-specimens was observed. The influence of single solid lubricants and the synergistic interaction of two, three or four solid lubricants on tribological properties of sintered composite materials were determined.

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Rheological and Frictional Properties of Lithium Complex Grease with Graphene Additives

Cited by 13 publications

References 29 publications

Facile Synthesis of Lignin-Castor Oil-Based Oleogels as Green Lubricating Greases with Excellent Lubricating and Antioxidation Properties

Facile Synthesis of Lignin-Castor Oil-Based Oleogels as Green Lubricating Greases with Excellent Lubricating and Antioxidation Properties

Tribological Performance Evaluation of Greases on a Four-Ball Tester with Graphene Oxide Nanoparticles

Tribological Properties of Cu-MoS2-WS2-Ag-CNT Sintered Composite Materials

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