Dialkyl Dithiophosphate-Functionalized Gallium-Based Liquid-Metal Nanodroplets as Lubricant Additives for Antiwear and Friction Reduction

2020 ◽  
Vol 3 (10) ◽  
pp. 10115-10122
Author(s):  
Baoluo He ◽  
Sha Liu ◽  
Xiangyuan Zhao ◽  
Jianxi Liu ◽  
Qian Ye ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Lubricant Additives ◽  
Friction Reduction ◽  
Dialkyl Dithiophosphate

Nitrogen-Phosphorus Codoped Carbon Nanospheres as Lubricant Additives for Antiwear and Friction Reduction

2020 ◽  
Vol 3 (6) ◽  
pp. 5362-5371
Author(s):  
Qian Ye ◽  
Sha Liu ◽  
Fei Xu ◽  
Jin Zhang ◽  
Shujuan Liu ◽  
...  
Keyword(s):  
Lubricant Additives ◽  
Friction Reduction ◽  
Carbon Nanospheres ◽  
Nitrogen Phosphorus

scholarly journals Ionic Liquids as High-Performance Lubricants and Lubricant Additives

2021 ◽  
Author(s):  
Hong Guo ◽  
Patricia Iglesias Victoria
Keyword(s):  
Ionic Liquids ◽  
Physicochemical Properties ◽  
High Performance ◽  
Negative Impact ◽  
Molecular Structures ◽  
Lubricant Additives ◽  
Friction Reduction ◽  
Protic Ionic Liquids ◽  
Protection Mechanisms ◽  
Low Toxicity

Taking into account the environmental awareness and ever-growing restrictive regulations over contamination, the study of new lubricants or lubricant additives with high performance and low toxicity over the traditional lubes to reduce the negative impact on the environment is needed. In this chapter, the current literature on the use of ionic liquids, particularly protic ionic liquids, as high-performance lubricants and lubricant additives to different types of base lubricants are reviewed and described. The relation between ionic liquids structures and their physicochemical properties, such as viscosity, thermal stability, corrosion behavior, biodegradability, and toxicity, is elaborated. Friction reduction and wear protection mechanisms of the ionic liquids are discussed with relation to their molecular structures and physicochemical properties.

FORMULATION OF REFINED, BLEACHED AND DEODORISED PALM STEARIN WITH ZINC DIALKYL-DITHIOPHOSPHATE ADDITIVE AND ITS TRIBOLOGICAL PERFORMANCE

2016 ◽  
Vol 78 (9-2) ◽  
Author(s):  
Nurul Farhanah Azman ◽  
Syahrullail Samion ◽  
Erween Abd Rahim
Keyword(s):  
Friction And Wear ◽  
Palm Stearin ◽  
Optical Microscope ◽  
Friction Reduction ◽  
Wear Performance ◽  
Environmental Friendliness ◽  
Zinc Dialkyl Dithiophosphate ◽  
The Coefficient Of Friction ◽  
Lubricant Base Stock ◽  
Dialkyl Dithiophosphate

Vegetable oils have recently received worldwide attention for their use as a lubricant base stock that has numerous advantages, including their environmental friendliness. In this study, a refined, bleached and deodorised palm stearin was selected as the base lubricant, and its friction and wear performance were investigated with a pin-on-disk tribotester. The effect of zinc dialkyl-dithiophosphate (ZDDP) additive in concentrations of 1wt%, 3wt% and 5wt% on friction and wear performance were evaluated. Commercial semi-synthetic oil SAE 15W50 was used for comparison purposes. The experiments were conducted at a sliding speed of 1.5 m/s under a normal force of 9.81 N for 60 min. Results show that an increase in ZDDP concentrations improved both friction reduction and wear performance of the lubricant. The coefficient of friction (COF) of RBD palm stearin was reduced approximately at 71% when 5wt% of ZDDP was added and it shows that the friction reduction performance of PS+5wt% (COF=0.039) was comparable to SAE 15W50 (COF=0.035). While, wear coefficient of RBD palm stearin was reduced significantly from 2.08 × 10−3 to 8.89 x 10−5 when 5wt% ZDDP additive was added and it shows that the wear performance of PS+5wt% was better than that of SAE 15W50, 1.94 x 10−4. Further analysis of the wear worn surface with a high-resolution optical microscope was also conducted with a surface profilometer to examine the metallurgy of the pin surface and the roughness of the pin.  

Triple Function Lubricant Additives Based on Organic–Inorganic Hybrid Star Polymers: Friction Reduction, Wear Protection, and Viscosity Modification

2018 ◽  
Vol 11 (1) ◽  
pp. 1363-1375 ◽  
Author(s):  
Bas G. P. van Ravensteijn ◽  
Raghida Bou Zerdan ◽  
Dongjin Seo ◽  
Nicholas Cadirov ◽  
Takumi Watanabe ◽  
...  
Keyword(s):  
Star Polymers ◽  
Lubricant Additives ◽  
Friction Reduction ◽  
Hybrid Star ◽  
Inorganic Hybrid ◽  
Wear Protection ◽  
Viscosity Modification

Halogen-free ionic liquids as synthetic ester oil antiwear additives

2018 ◽  
Vol 70 (9) ◽  
pp. 1590-1600 ◽  
Author(s):  
Zeyun Wang
Keyword(s):  
Ionic Liquids ◽  
Pour Point ◽  
Experimental Studies ◽  
Lubricant Additives ◽  
Friction Reduction ◽  
Antiwear Additives ◽  
Pour Point Depressant ◽  
Content Type ◽  
Synthetic Ester ◽  
Point Depressant

Purpose This paper aims to investigate the tribological properties of 1,4-bis(2-ethylhexyl) sulfosuccinate anion-based ionic liquids (ILs) when used as lubricant additives in synthetic ester oil. Design/methodology/approach The 1,4-bis(2-ethylhexyl) sulfosuccinate anion-based ILs containing different cation-imidazolium and organo-ammonium were synthesized and characterized. Their tribological performances as lubricant additives were assessed on ball-on-flat tribological tester. Their compatibility with typical additives (such as viscosity improver, antioxidant, pour point depressant and anti-rusting agent) were evaluated on a four-ball friction and wear tester. Findings It was found that the synthesized ILs demonstrated more effective friction reduction and antiwear properties than the base synthetic ester oil. The ILs worked well with the other typical additives, such as viscosity improver, antioxidant, pour point depressant and anti-rusting agent. Originality/value The results of the experimental studies demonstrated the potential of 1,4-bis(2-ethylhexyl) sulfosuccinate anion-based ILs as additives for improving friction reduction and antiwear abilities of synthetic ester oil.

Copper submicrospheres induced by pulsed laser-irradiation with enhanced tribology properties

2019 ◽  
Vol 43 (34) ◽  
pp. 13526-13535 ◽  
Author(s):  
Li Wang ◽  
Ting Luo ◽  
Wei Li ◽  
Haoming Wei ◽  
Xinchun Chen ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Pulsed Laser ◽  
Lubricant Additives ◽  
Friction Reduction ◽  
One Step ◽  
Pulsed Laser Irradiation

Copper submicrospheres prepared by one-step laser irradiation showed excellent friction reduction and self-repairing effects as lubricant additives.

scholarly journals Tribological Properties of SiO2@Cu And SiO2@MoS2 Core-Shell Microspheres As Lubricant Additives

2021 ◽  
Author(s):  
Xiaoliang Ma ◽  
Chaoliang Gan ◽  
Xiaopeng Li ◽  
Yuting Li ◽  
Peng Feng ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Friction And Wear ◽  
Hard Core ◽  
Lubricant Additives ◽  
Friction Reduction ◽  
Wear Volume ◽  
Core Shell ◽  
Base Oil ◽  
Tribological Behaviors ◽  
Lubrication Performance

Abstract Herein, core-shell structural SiO2@Cu and SiO2@MoS2 microspheres were prepared using SiO2 as hard core, Cu and MoS2 as shell. As lubricant additives were introduced into base oil (PAO 40), their friction-reduction and wear-resistance were investigated in detail. Comparing with onefold additive (SiO2, Cu and MoS2), such core-shell structure additives can improve the tribological behaviors at the Hertz contact stress range of 1.26 ~ 2.72 GPa (SiO2@Cu reduces the friction and wear up to 32.47% and 67.86% at 2.72 GPa, respectively). Besides, the tribological properties of SiO2@Cu microspheres are superior to that of SiO2@MoS2 (the wear volume was reduced by 48.45% at 2.72 GPa). The excellent tribological behaviors of SiO2@Cu microspheres can be ascribed to its structural advantage, the synergistic effect of hard SiO2 core and Cu shell. The rolling effect of SiO2, easy-shearing and self-repairing of Cu shell offer a synergistic lubrication function and form a dense protection film, thereby contributing to the optimal lubrication performance.

Sign in / Sign up

Export Citation Format

Share Document