Experimental Study on the Tribological Characteristics of Nanometer WS2 Lubricating Oil Additive Based on Engine Oil

2011 ◽  
Vol 328-330 ◽  
pp. 203-208 ◽  
Author(s):  
Cheng Bin Chen ◽  
Da Heng Mao ◽  
Chen Shi ◽  
Yang Liu
Keyword(s):  
Raw Materials ◽  
Viscosity Index ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Contrast Study ◽  
Base Oil ◽  
Grinding Conditions ◽  
Lubricating Oil Additive ◽  
Great Wall ◽  
Better Than

Nano-WS2(tungsten disulfide nanoparticles)lubricating oil additive, prepared by the nanometer WS2particulates and semi-synthetic engine base oil as raw materials, was added into Great Wall engine oil with different mass ratio. With a contrast study on these oil samples, the results show that it can improve the extreme pressure, antiwear and viscosity-temperature properties of the engine oil effectively by adding a certain amount of nano-WS2additive, and the optimal concentration is 2wt%. The oil film strength, sintering load and viscosity index of this lubricating oil is respectively 1.35 times, 1.58 times and 1.05 times as that of Great Wall engine oil. In addition, when tested under the grinding conditions of 392 N, 1450 r /min and 30 min, the diameter of worn spot reduces 0.018mm, and the average friction coefficients of friction pairs decrease 16.3%, both of which are lubricated by the oil containing nano-WS2additive. Meanwhile, the experiments testify that the tribological and viscosity-temperature properties of the nano-WS2additive are better than that of the Henkel MoS2additive.

Developing of High Power Density Diesel Engine Oil

2011 ◽  
Vol 233-235 ◽  
pp. 171-174
Author(s):  
Fu Chuan Huang ◽  
Yun Guo Xie ◽  
Mao Li Yang ◽  
Hui Juan Luo ◽  
Pan Tong ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Power Density ◽  
High Power ◽  
Chemical Properties ◽  
Engine Oil ◽  
Lubricating Oil ◽  
High Power Density ◽  
Operating Characteristics ◽  
Compact Structure ◽  
Base Oil

For high power density diesel engine operating characteristics and its unique compact structure, the development of new high power density diesel engine oil referred to the latest diesel engine oil standard GB 11122-2006. Through the comprehensive assessment of physical and chemical properties, the composite of poly a-olefin (PAO) and polymer esters was determined as base oil,and added high-performance additives. This oil developed has clean dispersion, antioxidation, anti-wear , anti-corrosion and other properties. the lubricating oil can well satisfy the performance requirements of high power density diesel engine.

Anti-Wear and Reduce-Friction Ability of ZrO2/SiO2 Self-Lubricating Composites

2009 ◽  
Vol 79-82 ◽  
pp. 1863-1866 ◽  
Author(s):  
Shi Yu Ma ◽  
Shao Hua Zheng ◽  
Hai Yang Ding ◽  
Wei Li
Keyword(s):  
Xrd Analysis ◽  
Lubricating Oil ◽  
Additive Concentration ◽  
Self Healing ◽  
Base Oil ◽  
Surface Modified ◽  
Lubricating Oil Additive ◽  
Ball Test ◽  
Self Lubricating Composites ◽  
Worn Surfaces

In this paper, the author does research on the surface modified of nanometer ZrO2/SiO2 composite and makes it a good dispersivity in organic solvents. As lubricating oil additive, added it into the base oil with different concentration. Anti-wear and reducing friction performances measured by the four ball test and the thrust-ring tribotester. The results showed that the average friction coefficient decreased 21.14%, the weight lost of the thrust-ring was no wear or negative wear when the additive concentration was 1wt%. The worn surfaces were quite different compared without additive, the grooves formed during the friction experiment become smooth and finally a narrow wear scar. There were many white particles and dimples on gray surface, the white particles were higher than those of gray parts. The white particles was ZrO2/SiO2 composites according to EDS and XRD analysis. The Si and Zr elements appeared on the worn surfaces can not be cleaned out in petroleum ether and ultrasonic ambiance, this is a dynamic self-healing mechanism .

scholarly journals Improvement Viscosity Index of Lubricating Engine Oil Using Low Molecular Weight Compounds

2019 ◽  
Vol 7 (1) ◽  
pp. 14-17 ◽  
Author(s):  
Shenwar A. Idrees ◽  
Lawand L. Mustafa ◽  
Sabah S. Saleem
Keyword(s):  
Polar Solvent ◽  
Viscosity Index ◽  
Temperature Stability ◽  
Polar Molecule ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Oil Viscosity ◽  
Different Temperatures ◽  
London Dispersion ◽  
Molecular Forces

the effect of polarity of solvent on the viscosity and viscosity index of lubricating engine oil has been studied using ethanol as an example of polar solvent and toluene as an example of non-polar solvent at different solvent ratios and ambient temperature and additionally other experiments have been done at five different temperatures including 100 oC. So that, the activation energy of viscous flow (Ea) was calculated, and for this purpose Arrhenius viscosity-temperature dependence has been applied and the results were 42.128, 29.256 and 35.417KJ/mole for lubricating engine oil mixed with ethanol, toluene and no additives in turn. It additionally shows that adding polar solvent to lubrication engine oil viscosity increases this may be due to the fact of strong inter molecular forces that found in polar molecules such as hydrogen bonding in ethanol makes the solution forces stronger as a result higher viscosity. However, adding non-polar solvent decreases viscosity because of small size of toluene and both paraffinic lubricating oil and toluene have same London dispersion inter molecular forces. Last not least, the result shows that engine oil mixed with non-polar molecule gives more temperature stability than that of polar molecule giving viscosity index (VI) 366 and 580 respectively.

Preparation and Properties of Nano-Inorganic Mineral Material as Lubricating Oil Additive

2009 ◽  
Vol 79-82 ◽  
pp. 1847-1850 ◽  
Author(s):  
Ping Wang ◽  
Shao Hua Zheng ◽  
Yan Sheng Yin ◽  
Deng Cheng Su
Keyword(s):  
Chemical Deposition ◽  
Lubricating Oil ◽  
Dispersion Property ◽  
Additive Concentration ◽  
Base Oil ◽  
Mineral Material ◽  
Load Carrying ◽  
Inorganic Mineral ◽  
Lubricating Oil Additive ◽  
Optimal Additive Concentration

In this paper, a 20nm inorganic mineral particles, mainly includes Mg3Si2O5(OH)4, KAlSiO4 and CaMg(CO3)2, were prepared by the ultrasonic nanometer grinder. As a lubricating oil additive, the dispersion property of the particles was characterized and the tribological properties were evaluated. The antiwear mechanism was investigated with SEM, EDS and XRD. Results show the inorganic nano-mineral material as an oil additive has excellent stable-dispersion property. The load-carrying capacity and antiwear property of the base oil were improved greatly. It can be inferred that the additive creates certain deposit on the friction surface. The physical-chemical deposition could not only bear the load but also prevent forming direct contact of two rubbing surface. 0.5wt% is the optimal additive concentration.

scholarly journals Synergistic lubricating effect of graphene/ionic liquid composite material used as an additive

Friction ◽  
2020 ◽  
Author(s):  
Lincong Liu ◽  
Ming Zhou ◽  
Youtang Mo ◽  
Pengpeng Bai ◽  
Qilin Wei ◽  
...  
Keyword(s):  
Composite Material ◽  
Ionic Liquid ◽  
Lubricating Oil ◽  
Wear Volume ◽  
Protective Film ◽  
Tribochemical Reaction ◽  
Base Oil ◽  
Out Of Plane ◽  
Lubricating Oil Additive ◽  
Lubricating Properties

AbstractWe prepared a graphene/ionic liquid (G/IL) composite material by the hybridization of G and an IL for use as a lubricating oil additive. The friction coefficient and wear volume of a base oil containing 0.04 wt% of the G/IL composite was reduced by 45% and 90%, respectively. Furthermore, the base oil containing the G/IL composite exhibited better lubricating properties than the base oil containing G, IL, or a mixture of IL and G at the same mass fraction. A synergistic lubrication mechanism was also revealed. The G/IL composite was adsorbed and deposited on the wear surface, forming a more ordered protective film and a unique tribochemical reaction film during rubbing. Therefore, the G/IL composite exhibited the synergistic lubricating effects of G and IL, which significantly improved the lubricating performance of the base oil. This study also suggested a way to limit the out-of-plane puckering of G at the macroscale.

Tribological and Oxidation Properties Study of a Kind of Sodium Sulfonate-Modified Nano Carbonate Sodium

2010 ◽  
Vol 146-147 ◽  
pp. 1605-1611
Author(s):  
Zhong Yi He ◽  
Li Ping Xiong ◽  
Huan Xu ◽  
Tao Li ◽  
Jian Wei Qiu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Tribological Properties ◽  
Lubricating Oil ◽  
Scanning Calorimetry ◽  
Base Oil ◽  
Sodium Sulfonate ◽  
Pressure Differential Scanning Calorimetry ◽  
Oxidation Properties ◽  
High Base ◽  
Lubricating Oil Additive

The tribological properties of a high base value sodium sulfonate-modified nano carbonate sodium as lubricating oil additive were introduced in this paper, and its antioxidant collaboration property with ashless antioxidant was evaluation by using pressure differential scanning calorimetry(PDSC). The results show that the product possesses good tribological properties, thermal stability, and a good synergistic antioxidation effect with ashless antioxidant, and mainly to increase oxidation free energy of base oil.

scholarly journals Online Oil Condition Monitoring of Four-Stroke Engine

2019 ◽  
Vol 9 (2) ◽  
pp. 698-703
Keyword(s):  
Viscosity Index ◽  
Specific Weight ◽  
Vital Role ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Actual Condition ◽  
Maintenance Schedule ◽  
Time Period ◽  
Timing Belt ◽  
Cylinder Piston

In recent days, Automobiles that make easy transportation of goods play an important role in the economic growth of any country. Transportation necessitates the continuous running of a vehicle without any unwanted break downs. The engine is considered as the heart of an automobile. Vehicle break on may happen due to unexpected or premature failures of some critical parts of an engine. Critical parts of engines are mainly cylinder, piston, crankshaft, timing belt, and clutch. The failure of the above components mainly depends on the lubricating performance of engine oil. Now a day’s oil is being usually replaced based on periodic maintenance schedule designed by vehicle manufacturers. This schedule is framed based on kilometer coverages of vehicles or time period. In this practice, there is the possibility of being oil replaced before completing its life. Even during service work, technicians in the workshop do not follow any method to know the actual condition of oil before replacing it. There is a need for actual driving habits, traffic conditions, engine speed, and load conditions, road conditions (gradients) to predict the condition up to which oil was being utilized. Thus the above is helpful in the prediction of the remaining life of engine oil. This can be done only by monitoring the properties of engine oil continuously during vehicle running. The properties of any lubricating oil are the viscosity, Viscosity index, density, Specific weight, Specific volume, specific gravity, surface tension, and capillarity. Since viscosity place, a vital role in lubrication oil condition can be judged by monitoring it continuously. The monitoring of viscosity helps to identify the actual condition of the oil. This is done by a system that receives signal for the temperature of oil, converts the same into viscosity units and displays it. Therefore vehicle users can identify the exact replacement of engine oil.

scholarly journals Analysis of selected results of engine oil tests

2019 ◽  
Vol 302 ◽  
pp. 01010
Author(s):  
Bogdan Landowski ◽  
Monika Baran
Keyword(s):  
Kinematic Viscosity ◽  
Viscosity Index ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Drive Unit ◽  
Passenger Car ◽  
Engine Oils ◽  
Different Temperatures ◽  
Rotary Viscometer

The study presents selected results of viscosity tests performed for different temperatures of lubricating oil with viscosity marked as 5w30. Viscosity tests of new oil and oil right after being used have been compared. Lubricating oil used in a drive unit of a passenger car was tested. A vehicle in which oil had been changed irregularly was purposefully selected for the tests. Its mileage was over 15-20 thousand kilometers. Upon testing the vehicle mileage was above 265 thousand kilometers. The values of selected characteristics of the analyzed engine oils have been determined including: density, kinematic viscosity and viscosity index. FUNGILAB rotary viscometer was used for measurement of the oil kinematic viscosity.

Jojoba modified polymers as performance modifiers additives for engine oil

2015 ◽  
Vol 67 (5) ◽  
pp. 425-433 ◽  
Author(s):  
Nehal S. Ahmed ◽  
Amal M. Nassar ◽  
Rabab M. Nasser
Keyword(s):  
Vinyl Acetate ◽  
Pour Point ◽  
Viscosity Index ◽  
Vinyl Pyrrolidone ◽  
Proton Nuclear Magnetic Resonance ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Content Type ◽  
Pour Point Depressants ◽  
Viscosity Index Improvers

Purpose – The purpose of this paper is to prepare novel types of copolymers and terpolymers depending on jojoba, and using them as additives for lubricating oil. Design/methodology/approach – Copolymerization of 1 mole of jojoba with 2 moles of vinyl acetate and copolymerization of 1 mole of jojoba with 2 moles of vinyl pyrrolidone were carried out. Then, two series of terpolymers were prepared by reacting (jojoba: vinyl acetate: alkylacrylate) and (jojoba: vinyl pyrrolidone: alkylacrylate), using free radical chain addition polymerization. Elucidation of the prepared polymers was carried out by using Fourier transform infrared spectroscopy, proton nuclear magnetic resonance and gel permeation chromatography, for determination of weight average molecular weight. The thermal stability of the prepared polymers was determined. The prepared polymers were evaluated as viscosity index improvers and pour point depressants for lubricating oil. Findings – It was found that the viscosity index increases with increasing the alkyl chain length of alkylacrylate. The effect of the monomer type was studied, and it was found that the polymers depending on vinyl acetate have great effect as viscosity index improvers and pour point depressants for lubricating oil. Originality/value – The polymerization of jojoba as different copolymers and terpolymers was carried out. The great influence of the prepared additives on modification of the viscosity properties and pour point of the oil was observed.

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