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

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.

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

Nano Futures ◽

10.1088/2399-1984/ac3ccd ◽

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.

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

Materials ◽

10.3390/ma14195821 ◽

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.

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Nano-Magnesium Silicate Hydroxide/Crumpled Graphene Balls Composites, a Novel Kind of Lubricating Additive with High Performance for Friction and Wear Reduction

Materials ◽

10.3390/ma13173669 ◽

2020 ◽

Vol 13 (17) ◽

pp. 3669

Author(s):

Tong Zhang ◽

Jianguo Zhao ◽

Jin Zhang ◽

Shanshan Zhang ◽

Jingwei Li ◽

...

Keyword(s):

Tribological Properties ◽

High Performance ◽

Magnesium Silicate ◽

Lubricating Oil ◽

Lamellar Thickness ◽

X Ray Diffraction ◽

Wear Scar Diameter ◽

Base Oil ◽

Friction Performance ◽

Crumpled Graphene

In this study, crumpled graphene balls (CGB), a kind of nano-material, was used as an additive to improve the tribological properties of base oil. Nano-magnesium silicate hydroxide (MSH)/CGB composites were prepared by ultrasound-assisted liquid-phase exfoliation. The loading of MSH significantly increased the number of pleats and reduced the lamellar thickness of CGB. Then, in order to improve the compatibility with the base oil, the MSH/CGB composites were decorated with oleic acid and stearic acid to get modified lipophilic composites (ML-MSH/CGB). The ML-MSH/CGB were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). In addition, the tribological properties of the ML-MSH/CGB in base oils were investigated using a ball-on-disc setup tribometer. It indicated that the fantastic tribological behavior of the ML-MSH/CGB in base oil may contribute to a smaller and extremely wrinkled laminated structure. Furthermore, the base oil with 0.005 wt% ML-MSH/CGB composites exhibited the best anti-friction effect, and its average friction coefficient, wearing capacity and wear scar diameter were reduced by 25.4%, 22.1% and 16.7%, respectively. The introduction of ML-MSH/CGB composed materials is an excellent strategy to optimize the friction performance of lubricating oil.

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

Jurnal METTEK ◽

10.24843/mettek.2019.v05.i01.p01 ◽

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.

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Tribological Properties of Zirconium Oxide, Spinel and Mullite Nanopowders as Lubricating Oil Additives

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.721.451 ◽

2016 ◽

Vol 721 ◽

pp. 451-455

Author(s):

Armands Leitans ◽

Eriks Palcevskis

Keyword(s):

Tribological Properties ◽

Zirconium Oxide ◽

Friction Pair ◽

Synthesis Method ◽

Lubricating Oil ◽

Nanosized Powders ◽

Base Oil ◽

Oil Additives ◽

Oxide Spinel ◽

Lubricating Oil Additives

In work investigated effects of zirconium oxide (ZrO2), spinel (MgAl2O4) and mullite (Al6Si2O13) nanosized powders on the base oil tribological properties. The nanosized (30-40nm) powders manufactured by plasma chemical synthesis method. Tribological experiments used on ball-on-disc type tribometer, measured coefficient of friction and determined metalic disc wear. Base oil used selectively purified mineral oil (conform SAE-20 viscosity) without any functional additives. Nanosized powders dispersed in base oil at 0.5; 1.0; 2.0; wt.%. At work cocluded, that the adition nanoparticles in base oil, possible reduced friction pair wear and friction coefficient. As the main results include spinel (MgAl2O4) nanoparticles 0.5 and 1.0 wt. % concentration ability reduced friction coeffiecient value.

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