Urea modified fluorinated carbon nanotubes: unique self-dispersed characteristic in water and high tribological performance as water-based lubricant additives

2019 ◽  
Vol 43 (37) ◽  
pp. 14684-14693 ◽  
Author(s):  
Chunying Min ◽  
Zengbao He ◽  
Dengdeng Liu ◽  
Kan Zhang ◽  
Changkun Dong
Keyword(s):  
Carbon Nanotubes ◽  
Tribological Properties ◽  
Tribological Performance ◽  
Lubricant Additives ◽  
Dispersion Stability ◽  
Aqueous Environments ◽  
Water Based ◽  
Fluorinated Carbon

UF-CNTs retaining a long-term dispersion stability in aqueous environments exhibit excellent tribological properties.

Synthesis by partial oxygenation of graphite-like carbon nitride (OCN) decorated with oleic diethanolamide borate (ODAB) for oil-based lubricant additives and its tribological properties

2020 ◽  
Vol 44 (14) ◽  
pp. 5377-5385
Author(s):  
Zengbao He ◽  
Chunying Min ◽  
Yuzi Yang ◽  
Kan Zhang ◽  
Changkun Dong ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Carbon Nitride ◽  
Lubricant Additives ◽  
Dispersion Stability

ODAB-OCN retaining long-term dispersion stability in an oil environment exhibits excellent tribological properties.

scholarly journals Tribological performance of various metal-doped carbon dots as water-based lubricant additives and their potential application as additives of poly(ethylene glycol)

Friction ◽  
2021 ◽  
Author(s):  
Weiwei Tang ◽  
Xuejun Zhu ◽  
Yufeng Li
Keyword(s):  
Ethylene Glycol ◽  
Tribological Properties ◽  
Carbon Dots ◽  
Lubricant Additives ◽  
Poly Ethylene Glycol ◽  
Wear Properties ◽  
Water Based ◽  
Friction Reducing ◽  
Poly Ethylene ◽  
Metal Doped

AbstractAdvances in nano-lubricant additives are vital to the pursuit of energy efficiency and sustainable development. Carbon dots (CDs) have been widely investigated in the domain of lubricant additives owing to their extraordinary tribological properties, in particular, their friction-reducing and anti-wear properties. Metal-doped CDs are a new type of CDs, and their friction-reducing and anti-wear properties are attracting increasing attention. Therefore, a series of CDs doped with various divalent metal ions have been successfully synthesized via one-pot pyrolysis. The tribological properties of the synthesized CDs as water-based lubricant additives are in the following order: Zn-CDs > Cu-CDs ≫ Mg-CDs > Fe-CDs > U-CDs. Specifically, adding 1.0 wt% of Zn-CDs into water-based lubricant results in 62.5% friction and 81.8% wear reduction. Meanwhile, the load-carrying capacity of the water-based lubricant increases from 120 N to at least 500 N. Zn-CDs as an additive have long service life. Additionally, anion-tuned Zn-CDs fabricated via anion exchange exhibit promise as lubricant additives for poly(ethylene glycol). Based on the results of wear scar surface analyses, it is discovered that tribochemical films, primarily composed of iron oxides, nitrides, metal carbonates, zinc oxides, zinc carbonates, organic compounds, and embedded carbon cores, formed on the rubbing surfaces with a thickness of approximately 270 nm when Zn-CDs are used as additives. This film combined with the “ball-bearing” and third-particle effects of Zn-CDs contributed to excellent lubrication performance.

Facile synthesis of core–shell Ag@C nanospheres with improved tribological properties for water-based additives

2018 ◽  
Vol 42 (11) ◽  
pp. 8773-8782 ◽  
Author(s):  
Haojie Song ◽  
Jian Huang ◽  
Xiaohua Jia ◽  
Weichen Sheng
Keyword(s):  
Tribological Properties ◽  
Glucose Solution ◽  
Tribological Performance ◽  
Core Shell ◽  
Facile Synthesis ◽  
The Core ◽  
Water Based

The core–shell Ag@C nanospheres were obtained from glucose solution by coupling reduction AgNO3 and catalytic carbonation. The tribological performance of Ag@C nanospheres as a water-based additive can be improved.

Frictional Reduction with Partially Exfoliated Multi-Walled Carbon Nanotubes as Water-Based Lubricant Additives

2018 ◽  
Vol 18 (5) ◽  
pp. 3427-3432 ◽  
Author(s):  
Xinghui Sun ◽  
Min Zhao ◽  
Bai Han ◽  
Hongjun Kang ◽  
Zhimin Fan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Lubricant Additives ◽  
Water Based ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Tribological Performance of Additives for Water-Based Lubricants

2009 ◽  
Author(s):  
A. Tomala ◽  
A. Karpinska ◽  
W. S. M. Werner ◽  
A. V. Olver ◽  
H. Sto¨ri
Keyword(s):  
Tribological Properties ◽  
Tribological Performance ◽  
Metalworking Fluids ◽  
Metal Working ◽  
Corrosion Properties ◽  
Working Fluids ◽  
Tribological Tests ◽  
Water Based ◽  
Before And After ◽  
Friction Behaviour

Fully formulated metalworking fluids have been thoroughly described in literature, but the influence of individual additives on tribological performance of such compositions is still not fully clear. In this study we want to establish the mechanism of how different additives affect tribological properties of the system, and to select the best compounds and concentrations for this purpose. The influence of various individual additives on friction behaviour, anti-wear and anti-corrosion properties of metal working fluids was examined. Additionally, chemical characterisation of the surfaces before and after tribological tests was done. The results show that additives can enhance one property while adversely affecting another. The best results were obtained for triethylamine and 1, 4-buthylene glycol, however mixing both additives gives opposite behaviour.

scholarly journals Preparation and Tribological Properties of Dual-Coated TiO2Nanoparticles as Water-Based Lubricant Additives

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Yue Gu ◽  
Xiuchen Zhao ◽  
Ying Liu ◽  
Yunxia Lv
Keyword(s):  
Tribological Properties ◽  
Titanium Dioxide Nanoparticles ◽  
Pure Water ◽  
Lubricant Additives ◽  
Wear Scar ◽  
Drilling Process ◽  
Wear Scar Diameter ◽  
Water Based ◽  
The Coefficient Of Friction ◽  
Worn Surface

Titanium dioxide nanoparticles (TiO2) were synthesized and then dual-coated with silane coupling agent (KH-570) and OP-10 in sequence in order to be dispersed stably in water as lubricant additives. The tribological properties and the application performance in Q235 steel machining of the nanoparticles as water-based lubricant additives were investigated on an MSR-10D four-ball tribotester and on a bench drilling machine, respectively. Scanning electron microscope (SEM) and atomic force microscope (AFM) were used to analyze the worn surface. The results show that the surface-modified TiO2nanoparticles can remarkably improve the load-carrying capacity, the friction reducing, and anti wear abilities of pure water. The wear scar diameter and the coefficient of friction of the water-based lubricating fluids with TiO2nanoparticles decreased, and the thick deep furrows on the surface of wear scar also decreased obviously with the increase of TiO2concentration. The power consumption in drilling process was lower and the cutting surface was smoother using the water-based lubricating fluids added TiO2nanoparticles compared to the fluid without addition. The reason for nanoparticles improving tribological properties of water based lubricating fluid might be the formation of a dynamic deposition film during rubbing process according to analysis of the worn surface.

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