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.

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.

scholarly journals Novel Surfactant-Free Water Dispersion Technique of TiO2 NPs Using Focused Ultrasound System

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 427
Author(s):  
Seon Ae Hwangbo ◽  
Minjeong Kwak ◽  
Jaeseok Kim ◽  
Tae Geol Lee
Keyword(s):  
Tio2 Nanoparticles ◽  
Focused Ultrasound ◽  
Pure Water ◽  
Free Water ◽  
Dispersion Stability ◽  
Renewable Energy Resources ◽  
Water Dispersion ◽  
Dispersion State ◽  
Dispersion Technique

Titanium dioxide (TiO2) nanoparticles are used in a wide variety of products, such as renewable energy resources, cosmetics, foods, packaging materials, and inks. However, large quantities of surfactants are used to prepare waterborne TiO2 nanoparticles with long-term dispersion stability, and very few studies have investigated the development of pure water dispersion technology without the use of surfactants and synthetic auxiliaries. This study investigated the use of focused ultrasound to prepare surfactant-free waterborne TiO2 nanoparticles to determine the optimal conditions for dispersion of TiO2 nanoparticles in water. Under 395–400 kHz and 100–105 W conditions, 1 wt% TiO2 colloids were prepared. Even in the absence of a surfactant, in the water dispersion state, the nanoparticles were dispersed with a particle size distribution of ≤100 nm and did not re-agglomerate for up to 30 days, demonstrating their excellent dispersion stability.

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.

Investigation of Sliding Friction Pairs With Electro-Pulse Sprayed Micro-Coats

2005 ◽  
Author(s):  
Albinas Andriusis ◽  
Vytenis Jankauskas ◽  
Juozas Padgurskas ◽  
Raimundas Rukuiza ◽  
Audrius Zunda
Keyword(s):  
Tribological Properties ◽  
Sliding Friction ◽  
Copper Films ◽  
Dense Structure ◽  
Coating Technology ◽  
Conductive Materials ◽  
Multi Stage ◽  
Wire Conductor ◽  
Control Version

Electro-pulse spraying (EPS) is the coating technology of “electric explosion of conductive materials” when high-voltage and powerful impulse flows through a wire conductor. Object of our investigation — tribological properties of sliding pairs with copper micro-coats made by EPS after one time explosion. Small-grained dense structure coat with evaluated thickness about 4–6 ?m was obtained. Tribological tests, performed at marginal lubrication with multi-stage load, shows that using EPS-specimens the value of friction coefficient is lower as control version. At instantaneous setting of load for long-term running the copper films adopts well to the change of load. The wear of friction pairs according to worn mass show that EPS-specimens worn 79% less than CV-specimens. The investigations point out that copper micro-coats have better tribological properties comparing to control version of friction pairs.

scholarly journals A comparative study on the functionality of S- and P-based lubricant additives by combined first principles and experimental analysis

RSC Advances ◽  
2016 ◽  
Vol 6 (53) ◽  
pp. 47753-47760 ◽  
Author(s):  
M. C. Righi ◽  
S. Loehlé ◽  
M. I. De Barros Bouchet ◽  
S. Mambingo-Doumbe ◽  
J. M. Martin
Keyword(s):  
Shear Strength ◽  
Comparative Study ◽  
Surface Chemistry ◽  
Tribological Properties ◽  
Experimental Analysis ◽  
First Principles ◽  
Lubricant Additives ◽  
First Principles Calculations

Sulfur reduces the adhesion and shear strength of iron more effectively than phosphorus. The surface chemistry, well described by first principles calculations, impacts macroscale tribological properties.

scholarly journals Preparation of TiO2/Ti3C2Tx hybrid nanocomposites and their tribological properties as base oil lubricant additives

RSC Advances ◽  
2017 ◽  
Vol 7 (8) ◽  
pp. 4312-4319 ◽  
Author(s):  
Maoquan Xue ◽  
Zhiping Wang ◽  
Feng Yuan ◽  
Xianghua Zhang ◽  
Wei Wei ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Tribological Properties ◽  
Lubricant Additives ◽  
Hybrid Nanocomposites ◽  
Phase Synthesis ◽  
Base Oil

TiO2/Ti3C2Tx hybrid nanocomposites were successfully prepared by a liquid phase synthesis technology. The hybrid nanocomposites improve the tribological properties of base oil by mending the surface and formation a uniform tribofilm on the surface.

Tribological Properties of TiO2/BP Nanocomposites as Lubricant Additives for Titanium Alloy Tribo-pairs

2021 ◽  
pp. 1-14
Author(s):  
Yufu Xu ◽  
Kequn Sun ◽  
Jingyuan Yu ◽  
Yichen Bao ◽  
Yinghui Dong ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Tribological Properties ◽  
Lubricant Additives
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