Study on tribological properties of nano lubricating oil blends for diesel engines

Nano Futures ◽  
2021 ◽  
Author(s):  
Xin Kuang ◽  
Bifeng Yin ◽  
Xiping Yang ◽  
Hekun Jia ◽  
Bo Xu
Keyword(s):  
High Temperature ◽  
Ambient Temperature ◽  
Tribological Properties ◽  
Diesel Engines ◽  
Dispersion Stability ◽  
Lubricating Oil ◽  
Oil Blends ◽  
Before And After ◽  
Nano Graphene ◽  
Modified Graphene

Abstract This paper is to evaluate and compare the tribological properties of lubricating oil blends added with nano graphene and lubricating oil blends added with cerium oxide (CeO2) on the key friction pairs of the diesel engines. The dispersion stability is the premise of studying the tribological properties. In this paper, nano-CeO2 particles were self-made and high-quality nano-graphene was purchased. The dispersion stability of the two nanomaterials in lubricating oil was studied after the same modification respectively. According to the working conditions of the cylinder liner and the piston ring, the friction and wear tests of the lubricating oil blends added with the modified nanomaterials were carried out at the different temperatures. The results showed that the oleic acid and the stearic acid modified the two nanomaterials successfully. The dispersion stability of the modified nanomaterials in lubricating oil was improved. The dispersion stability of the lubricating oil blends added with graphene before and after modification was slightly higher than that of lubricating oil blends added with CeO2 before and after modification, respectively. At the high temperature, the anti-friction property of the two nano lubricating oil blends was similar. At the ambient temperature, lubricating oil blends added with modified CeO2 did not play a role in reducing friction, while lubricating oil blends added with modified graphene had the effect of reducing friction. Whether at ambient temperature or at the high temperature, the anti-wear property lubricated with lubricating oil blends added with modified CeO2 within the right concentration range was better than that lubricated with lubricating oil blends added with modified graphene.

EVALUATION ON THE TRIBOLOGICAL PROPERTIES OF DOUBLE FRACTIONATED PALM OLEIN AT DIFFERENT LOADS USING PIN-ON-DISC MACHINE

2015 ◽  
Vol 75 (11) ◽  
Author(s):  
N. Nuraliza ◽  
S. Syahrullail ◽  
M.N. Musa
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
Tribological Properties ◽  
Palm Olein ◽  
Pure Aluminum ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Hydraulic Oil ◽  
Before And After ◽  
Pin On Disc

The use of vegetable oil-based lubricant as a lubricant in various applications has increased and it is eyed by the industry due to its superior tribological properties, besides possessing the potential to replace petroleum-based lubricants. Palm olein is one of alternative lubricants that could be suitable and attractive as a lubricant to be studied due to its advantages and large production in the country. Thus, in this study, the behavior of palm olein characteristics was investigated by using pin-on-disc experiment, in which a hemispherical pin was loaded against the rotating grooved disc. The experiments via sliding were performed with pin-on-disc tester using pure aluminum as the material for hemispherical pin and SKD11 for disc. The test was implemented by dropping continuous flow of palm olein as lubricating oil on sliding surface at different loads applied, which were 10N, 50N, and 100N. The wear rate of the pin and the friction coefficient were also investigated. Moreover, the surface roughness before and after the experiment was analyzed as well. All the results obtained were compared to hydraulic oil and engine oil-SAE 40. From the analysis, the friction coefficient acquired from lubricated with palm olein was the lowest for both conditions. The wear rate obtained for the three lubricants increased from 10N to 100N load for palm oil, but decreased for hydraulic and engine oil-SAE 40. Meanwhile, the wear rate obtained for lubrication with hydraulic oil showed the lowest value compared to Engine oil-SAE 40 and double fractionated palm olein. 

scholarly journals High-temperature tribological properties of diamond-like carbon films: A review

2021 ◽  
Vol 60 (1) ◽  
pp. 276-292
Author(s):  
Qunfeng Zeng ◽  
Zekun Ning
Keyword(s):  
High Temperature ◽  
Tribological Properties ◽  
Rapid Development ◽  
Carbon Films ◽  
Lubricating Oil ◽  
Diamond Like Carbon ◽  
Oil And Grease ◽  
Low Friction ◽  
Preparation Methods ◽  
Thermal Stability Of

Abstract The rapid development of aerospace industry has made more and more machinery parts of equipment working at high temperature. Due to the lubrication failure of lubricating oil and grease at high temperature, solid lubricant coatings are almost the only effective method to achieve super low friction at high temperature. In recent years, the tribological properties of diamond-like carbon (DLC) films have been extensively studied at high temperature. The present study reviews the microstructure of DLC films and the influence of doping different elements on the structure of DLC films. Second, the mechanical properties and thermal stability of pure DLC films and DLC doped with different elements are also described. DLC films have different microstructures and tribological properties by different preparation methods. Finally, the high-temperature lubrication failure mechanism of DLC films and the tribological properties of DLC films when doped with different elements are discussed from the macro and micro perspectives.

scholarly journals Preparation and Tribological Properties of Lanthanum Stearate Modified Lubricating Oil for Wire Rope in a Mine Hoist

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5821
Author(s):  
Yewei Zhang ◽  
Qing Zhang ◽  
Yuxing Peng ◽  
Chen Wang ◽  
Xiangdong Chang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Tribological Properties ◽  
High Speed ◽  
Wire Rope ◽  
Dispersion Stability ◽  
Lubricating Oil ◽  
Wear Properties ◽  
Wear Scar Diameter ◽  
Good Thermal Stability ◽  
Mine Hoist

In view of the serious friction and wear on the surface of a hoisting wire rope caused by the failure of lubrication under severe hoisting conditions, a study on the tribological characteristics of lanthanum stearate modified lubricating oil (LSMLO) was carried out. First, lanthanum stearate was prepared by the saponification reaction, and its surface morphology, chemical structure, thermal stability, and dispersion stability in IRIS-550A lubricating oil (IRIS) for wire rope were analyzed. Then, the tribological properties of LSMLO were investigated through four-ball friction tests and sliding wear tests of wire ropes. The results show that stearic acid almost completely reacts to produce lanthanum stearate, which has good thermal stability and a disordered layered structure. With the help of oleic acid, the dispersion stability of lanthanum stearate in IRIS can be significantly improved. The four-ball friction tests show that the optimal addition amount of lanthanum stearate in IRIS is 0.2 wt.%, and the CoF and wear scar diameter are reduced by about 35% and 25% respectively when lubricated with LSMLO compared to that with IRIS. LSMLO can better reduce the wear of the wire rope under different sliding speeds and contact loads than IRIS, and it exhibits improved anti-friction and anti-wear properties under high speed and low load.

scholarly journals Excellent Dispersion Stability and Tribological Properties of Biocarbon-based Magnesium Silicate Hydroxide Modified with Oleylamine

2021 ◽  
Author(s):  
Rongqin Gao ◽  
Qiuying Chang ◽  
Kai Wang ◽  
Yang Liu
Keyword(s):  
Carbon Source ◽  
Tribological Properties ◽  
Contact Area ◽  
Steric Hindrance ◽  
Magnesium Silicate ◽  
Lubricant Additive ◽  
Carbon Layer ◽  
Dispersion Stability ◽  
Lubricating Oil ◽  
Repairing Effect

Abstract Biocarbon-based magnesium silicate hydroxide(M@C-ON) was synthesized by hydrothermal method with synthesized magnesium silicate hydroxide (MSH) as the template, glucose as carbon source, and oleylamine (ON) as the modified agent. The dispersion stability of M@C-ON as lubricant additive in PAO10 with ON as dispersant was measured by accelerated centrifugal and static sedimentation test. The results showed that M@C-ON, with the help of ON, can be stably dispersed in lubricating oil for at least 15 days. The stable dispersion was attributed to a combination of electrostatic attraction and steric hindrance. Besides, the tribological properties of M@C-ON as lubricant additive was tested under different concentration of additive and dispersant. A continuous carbon layer formed on the contact area and the repairing effect of inner MSH of M@C-ON were considered as the factors to play an anti-wear effect.

Dispersion Stability And Tribological Properties of Covalently Modified Graphene As A Lubricating Oil Additive

2021 ◽  
Author(s):  
Mingyue Wang ◽  
Ming Zhou ◽  
Shengli You ◽  
Xin Chen ◽  
Youtang Mo ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Covalent Modification ◽  
Dispersion Stability ◽  
Lubricating Oil ◽  
Primary Amines ◽  
Base Oil ◽  
Amide Bonds ◽  
Stable Dispersion ◽  
Wide Range ◽  
Modified Graphene

Abstract Graphene has excellent mechanical properties with a low coefficient of friction and wear resistance and has a wide range of tribological applications. However, the stable dispersion of graphene in lubricating media is challenging. In this study, graphene is processed via covalent modification. A mild oxidation method selectively grafts carboxyl groups on the edge of the graphene sheet, before connecting tertiary alkyl primary amines through amide bonds. The alkyl chain allows graphene to be stably dispersed in hydrocarbon solvents.. FT-IR, XPS, Raman, XRD, SEM, etc. are used to characterize the covalently modified graphene (MG). Dispersion stability experiments showed that MG exhibited stable dispersion in 500N base oil and 15w-40 commercial lubricants, with stability for over 2 months. Tribological test results show that MG in 500N and 15w-40 significantly reduces the friction and wear of steel-steel friction pairs. The stable dispersion of MG in lubricating oil enables the formation of a stable chemical reaction film and graphene physical deposition film during the friction, protects the worn surface, and reduces direct contact, thereby significantly reducing friction and wear.

scholarly journals High Temperature Tribological Properties of Modified Nano-diamond Additive in Lubricating Oil

2013 ◽  
Vol 50 ◽  
pp. 343-347 ◽  
Author(s):  
X.F. Sun ◽  
Y.L. Qiao ◽  
W. Song ◽  
S.N. Ma ◽  
C.H. Hu
Keyword(s):  
High Temperature ◽  
Tribological Properties ◽  
Lubricating Oil

scholarly journals Pengaruh Penambahan Minyak Kelapa dan Sawit Terhadap Sifat Fisik dan Tribologi Pelumas SAE 40

Jurnal METTEK ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
Dedison Gasni ◽  
KM Abdul Razak ◽  
Ahmad Ridwan ◽  
Muhammad Arif
Keyword(s):  
Fatty Acids ◽  
Coefficient Of Friction ◽  
Tribological Properties ◽  
Palm Oil ◽  
Boundary Lubrication ◽  
Viscosity Index ◽  
Coconut Oil ◽  
High Viscosity ◽  
Mineral Oil ◽  
Lubricating Oil

Penelitian ini bertujuan untuk mengetahui efek dari penambahan minyak kelapa dan sawit terhadap sifat fisik dan tribologi pelumas SAE 40. Vegetabel oil, seperti; minyak kelapa dan sawit, memiliki nilai viskositas indek yang tinggi dan sifat pelumasan yang baik terutama didaerah boundary lubrication jika dibandingkan dengan mineral oil (SAE 40). Hal ini disebabkan karena vegetabel oil memiliki kandungan fatty acids yang tidak dimiliki oleh mineral oil. Keunggulan lain dari minyak kelapa dan sawit adanya sifat yang ramah lingkungan karena mudah terurai di alam dan dapat diperbaharui. Pada penelitian ini sifat yang baik dari minyak kelapa dan sawit ini akan dimanfaatkan sebagai zat aditif pada minyak pelumas SAE 40. Pengujian dilakukan terhadap sifat fisik dan tribology dengan penambahan 5%, 10%, 15%, dan 20% berat dari minyak kelapa dan sawit ke dalam minyak pelumas SAE 40. Pengujian sifat fisik terdiri dari pengukuran viskositas pada temperatur 400C dan 1000C dan viskositas index. Pengujian sifat tribologi untuk menentukan keausan dan koefisien gesek berdasarkan ASTM G99 dengan menggunakan alat uji pin on disk. Dari hasil pengujian diperoleh bahwa dengan penambahan minyak kelapa dan sawit kedalam minyak pelumas SAE 40 terjadi peningkatan viskositas indeks. Peningkatan viskositas indeks sebanyak  17% dengan penambahan 20% minyak sawit. Terjadi perubahan sifat tribologi dengan penambahan minyak sawit, berupa penurunan keausan dan nilai koefisien gesek dibandingkan dengan penambahan minyak kelapa. This study aims to determine the effect of coconut and palm oils as additives to physical and tribological properties of SAE 40 lubricating oil . Vegetable oils, such as; coconut oil and palm oil, have high viscosity index and good lubrication properties, especially in boundary lubrication compared to mineral oil. This is due to vegetable oil having fatty acids that are not owned by mineral oil. The advantages of coconut oil and palm oil are environmentally friendly properties because they are biodegradable and renewable. In this study, the good properties of coconut and palm oils will be used as additives in SAE 40 lubricating oil. Tests are carried out on the physical and tribological properties with the addition of 5%, 10%, 15%, and 20% by weight of coconut and palm oils into SAE 40 lubricating oil. Physical properties testing consists of measuring viscosity at temperatures of 400C and 1000C and viscosity index. The tribological test is to determine wear and coefficient of friction based on ASTM G99 using a pin on disc test equipment. From the test results,  it was found that coconut and palm oils as additives into SAE 40 lubricating oil could increase in viscosity index. The increase of  the viscosity index was 17% by adding 20% of palm oil. There was a change of tribological properties in the form of decreasing on the wear and the coefficient of friction with the addition of palm oil compare to addition of coconut oil.

Fabrication and high temperature tribological properties of WC reinforced W-Cu composites

2021 ◽  
pp. 102550
Author(s):  
Youting Huang ◽  
Xiaowei Li ◽  
Yuanfei Zha ◽  
Xiaolong Zhou ◽  
Dongliang Peng ◽  
...  
Keyword(s):  
High Temperature ◽  
Tribological Properties

scholarly journals Progress in the Use of Biobutanol Blends in Diesel Engines

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3215
Author(s):  
David Fernández-Rodríguez ◽  
Magín Lapuerta ◽  
Lizzie German
Keyword(s):  
Ambient Temperature ◽  
Diesel Fuel ◽  
Diesel Engines ◽  
Electronic Control Unit ◽  
Control Unit ◽  
Transport Sector ◽  
Particulate Matter Emissions ◽  
Production Techniques ◽  
Road Freight Transportation ◽  
Advanced Production

Nowadays, the transport sector is trying to face climate change and to contribute to a sustainable world by introducing modern after-treatment systems or by using biofuels. In sectors such as road freight transportation, agricultural or cogeneration in which the electrification is not considered feasible with the current infrastructure, renewable options for diesel engines such as alcohols produced from waste or lignocellulosic materials with advanced production techniques show a significant potential to reduce the life-cycle greenhouse emissions with respect to diesel fuel. This study concludes that lignocellulosic biobutanol can achieve 60% lower greenhouse gas emissions than diesel fuel. Butanol-diesel blends, with up to 40% butanol content, could be successfully used in a diesel engine calibrated for 100% diesel fuel without any additional engine modification nor electronic control unit recalibration at a warm ambient temperature. When n-butanol is introduced, particulate matter emissions are sharply reduced for butanol contents up to 16% (by volume), whereas NOX emissions are not negatively affected. Butanol-diesel blends could be introduced without startability problems up to 13% (by volume) butanol content at a cold ambient temperature. Therefore, biobutanol can be considered as an interesting option to be blended with diesel fuel, contributing to the decarbonization of these sectors.

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