Influence of nano-additives (nano-PTFE and nano-CaCO) on tribological properties of food-grade aluminum-based grease

Gong, Longfei; Qian, Shanhua; Wang, Wei; Zhang, Ni; Tang, Lei

doi:10.1016/j.triboint.2021.107014

Cited by 20 publications

(7 citation statements)

References 34 publications

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“…As CSG with 5 wt% mCaCO 3 could form a thick calcium carbonate film on the surface, the peak of iron oxide in the films is so weak especially at 30°C, which is consistent with the previous research results 30 . Meanwhile, the wide peaks of O 1 s at about 529.5–531.4 eV (Figure 12c) refers to the iron oxide, CaCO 3 and CaO while the peaks of Ca 2p at about 347.3 and 350.9 eV (Figure 12d) refers to CaCO 3 and CaO 25,39 . This results clearly indicated that the CaCO 3 and CaO on the surface play an important role in the tribological behaviour of CSG.…”

Section: Resultssupporting

confidence: 88%

“…30 Meanwhile, the wide peaks of O 1 s at about 529.5-531.4 eV (Figure 12c) refers to the iron oxide, CaCO 3 and CaO while the peaks of Ca 2p at about 347.3 and 350.9 eV (Figure 12d) refers to CaCO 3 and CaO. 25,39 This results clearly indicated that the CaCO 3 and CaO on the surface play an important role in the tribological behaviour of CSG. Although the F I G U R E 1 0 Scanning electron microscope, 3D, EDS and Ca element mapping of wear surface lubricated by scanning electron microscope (a1-a4), CSG with 5 wt% mCaCO 3 (b1-b4) and CSG with 5 wt% nCaCO 3 (c1-c4) at 30 C under 500 N.…”

Section: Surface Analysismentioning

confidence: 80%

“…24 Moreover, Gong et al revealed that 3 wt% nano-PTFE and 2 wt% nano-CaCO 3 additives could improve the extreme pressure (EP) and tribological properties of the food grade grease. 25 Wu et al also revealed that 5 wt% CaCO 3 and 1 wt% hBN mixed additives had the greatest vibration suppression performance in polyurea grease. 26 It is well known that under different operating conditions, the microstructure and surface film forming ability of CaCO 3 have an important impact on the tribological properties of lubricating grease.…”

Section: Introductionmentioning

confidence: 97%

“…Xu et al also discovered that 5 wt% CaCO 3 nanoparticles as optimum concentration for enhancing the tribology performance of lithium‐calcium grease 24 . Moreover, Gong et al revealed that 3 wt% nano‐PTFE and 2 wt% nano‐CaCO 3 additives could improve the extreme pressure (EP) and tribological properties of the food grade grease 25 . Wu et al also revealed that 5 wt% CaCO 3 and 1 wt% hBN mixed additives had the greatest vibration suppression performance in polyurea grease 26 …”

Section: Introductionmentioning

confidence: 99%

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The size effect of typical micro‐ and nano‐calcium carbonate additives on the friction properties of calcium sulfonate grease

Sun,

Zhao,

et al. 2023

Lubrication Science

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This paper firstly reports the size effect of typical micro‐ and nano‐ calcium carbonate additives on the friction properties of calcium sulfonate grease. The rheological and tribological performance of calcium sulfonate grease with typical micro‐ and nano‐ calcium carbonate additives were investigated at 30 or 80°C by Rheometer and Optimol SRV‐V tester. To its surprise, calcium sulfonate grease with 5% calcium carbonate microparticles behave remarkable lubrication performance than calcium sulfonate grease with 5% calcium carbonate nanoparticles under boundary lubrication condition according to the rheological analysis and tribological evaluation. The enhancement in excellence tribological performance can be attributed to the synergistic effect between calcium carbonate microparticles and calcium carbonate in thickener of calcium sulfonate grease. The thin film composed of CaCO3 and CaO on the worn surface generated by solid particles is conducive to reducing friction and wear.

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Section: Resultssupporting

confidence: 88%

Section: Surface Analysismentioning

confidence: 80%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The size effect of typical micro‐ and nano‐calcium carbonate additives on the friction properties of calcium sulfonate grease

Sun,

Zhao,

et al. 2023

Lubrication Science

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“…In recent years, it has been mainly focused on enhancing the performance of lubricating materials by means of adding additives. High‐molecular weight phenols can greatly improve the antioxidant properties of food‐grade grease, 10 and PTFE could improve the anti‐wear property of food‐grade composite aluminium base greases 11,12 . In order to avoid the lubrication failure and bacterial growth, food‐grade grease of high temperature resistance will be a better choice 2 …”

Section: Introductionmentioning

confidence: 99%

Effects of carbon nano onions on the tribological performance of food‐grade calcium sulfonate complex grease

Wang

Qian

Gong

et al. 2021

Lubrication Science

Self Cite

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To improve the lubricity of the as‐prepared food‐grade calcium‐based grease, the effects of nano‐additive carbon nano onions (CNOs) on the tribological properties are systematically investigated using a ball‐disc wear tester. The properties of CNOs‐containing food‐grade calcium sulfonate complex greases (CSCG‐FG) were characterised by thermogravimetric analyser, rheometer and electrochemical workstation, Listeria monocytogenes, X‐ray photoelectron spectrometer and Raman spectrometer. The results revealed that pure and CNOs‐containing CSCG‐FG were proved to be safe. The average coefficient of friction (aCoF) and wear volume of the disc at CSCG‐FG of 0.10 wt% CNOs were the minimal values, which were 31.4 and 70.0% less than that of pure CSCG‐FG at 25°C and greatly lower than that of similar commercial food‐grade grease. At high temperature, CNOs‐containing CSCG‐FG had lower aCoFs and torques. CSCG‐FG of 0.10 wt% CNOs would be most possibly used in engineering applications and the results will provide valuable insight into developing food‐grade lubricants.

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Stabilizing Interfacial Behaviors of Ni‐rich Cathodes by Upcycling of Oyster Shells Waste

Heo,

Jung,

Kim

et al. 2024

Advanced Sustainable Systems

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Layered lithium oxides (LNCM), with over 60% Ni, are promising cathode materials for electric vehicles due to their high capacity. however, reliable cycling retention cannot easily achieved owing to the instability of the interface. Here, recycled oyster shell (OS) is employed as an efficient precursor for the surface modification of LNCM cathodes; subsequently, Ca‐based artificial cathode–electrolyte interphases (CEI) are obtained at the LNCM interfaces through a simple calcination process. When the pulverized OS is calcined with LNCM cathode materials at elevated temperatures, CaCO3 is converted to CaO via thermal decomposition at the LNCM interface, which effectively protects the unstable interface. Microscopic analyses indicate the nanodomain island‐type CEI layers embedded after OS calcination. The OS‐coated LNCM cathode materials increase the cycling retention after 100 cycles (93.8% vs. 62.7%) and decrease the internal cell pressure by preventing electrolyte decomposition. Incorporating Ca into the LNCM cathode materials also inhibits microcrack formation because of the improvement in particle hardness and the remarkable decrease in the irreversible dissolution of transition metals from LNCM cathodes, considering that Ca plays a crucial role in scavenging fluoride species. Consequently, recycling OS as a functional LNCM precursor is an innovative approach for enhanced cycling retention.

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Influence of nano-additives (nano-PTFE and nano-CaCO) on tribological properties of food-grade aluminum-based grease

Cited by 20 publications

References 34 publications

The size effect of typical micro‐ and nano‐calcium carbonate additives on the friction properties of calcium sulfonate grease

The size effect of typical micro‐ and nano‐calcium carbonate additives on the friction properties of calcium sulfonate grease

Effects of carbon nano onions on the tribological performance of food‐grade calcium sulfonate complex grease

Stabilizing Interfacial Behaviors of Ni‐rich Cathodes by Upcycling of Oyster Shells Waste

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