Preparation and evaluation of tribological properties of oil-soluble rice-like CuO nanoparticles

2015 ◽  
Vol 67 (3) ◽  
pp. 276-283 ◽  
Author(s):  
Hao Liu ◽  
Yujuan Zhang ◽  
Shengmao Zhang ◽  
Yanfen Chen ◽  
Pingyu Zhang ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Normal Load ◽  
Cuo Nanoparticles ◽  
Lubricating Oil ◽  
Infrared Spectrometry ◽  
Environment Friendly ◽  
Content Type ◽  
X Ray ◽  
Oil Additives ◽  
Lubricating Oil Additives

Purpose – The purpose of this paper is synthesis of oil-soluble non-spherical nanoparticles modified with free phosphorus and sulphur modifier and investigation of their tribological properties as environment-friendly lubricating oil additives. Design/methodology/approach – To study the effect of morphology of nanoparticles on their tribological properties, rice-like CuO nanoparticles were synthesized. To improve the solubility of CuO nanoparticles in organic media, the in-situ surface modification method was used to synthesize these products. The morphology, composition and structure of as-synthesized CuO nanoparticles were investigated by means of transmission electron microscopy, X-ray powder diffraction, thermogravimetric analysis and Fourier transform infrared spectrometry. The tribological properties of as-synthesized CuO nanoparticles as an additive in liquid paraffin (LP) were evaluated with a four-ball tribometer. The morphology and elemental composition of worn steel ball surfaces were analysed by X-ray photoelectron spectroscopy. Findings – It has been found that as-synthesized CuO nanoparticles with rice-like morphology have an average size of 7 and 15 nm along the shorter axle and longer axle, respectively, and can be well-dispersed in LP. Tribological properties evaluation results show that as-synthesized CuO nanoparticles as additives in LP show good friction-reducing, anti-wear and load-carrying capacities, especially under a higher normal load. Originality/value – Oil-soluble rice-like CuO nanoparticles without phosphorus and sulphur were synthesized and their tribological properties as lubricating oil additives were also investigated in this paper. These results could be very helpful for application of CuO nanoparticles as environment-friendly lubricating oil additives, owing to their free phosphorus and sulphur elements characteristics.

Synthesis and tribological properties of oil-soluble copper nanoparticles as environmentally friendly lubricating oil additives

2015 ◽  
Vol 67 (3) ◽  
pp. 227-232 ◽  
Author(s):  
Yujuan Zhang ◽  
Yaohua Xu ◽  
Yuangbin Yang ◽  
Shengmao Zhang ◽  
Pingyu Zhang ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Liquid Paraffin ◽  
Lubricating Oil ◽  
Infrared Spectrometry ◽  
Cu Nanoparticles ◽  
Wear Properties ◽  
Environment Friendly ◽  
Content Type ◽  
Oil Additives ◽  
Lubricating Oil Additives

Purpose – The purpose of this paper is to synthesize oil-soluble copper (Cu) nanoparticles modified with free phosphorus and sulfur modifier and investigate its tribological properties as environment-friendly lubricating oil additives. Design/methodology/approach – To improve the anti-oxidation properties of these nanoparticles, two kinds of surface modifiers, oleic acid and oleylamine were used simultaneously. The morphology, composition, structure and thermal properties of as-synthesized Cu nanoparticles were investigated by means of transmission electron microscopy, X-ray powder diffraction, Fourier transform infrared spectrometry and differential thermal and thermogravimetric analysis. The tribological properties of as-synthesized Cu nanoparticles as an additive in liquid paraffin were evaluated with a four-ball friction and wear tester. Findings – It has been found that an as-synthesized Cu nanoparticle has a size of 2-5 nm and can be well dispersed in organic solvents. Tribological properties evaluation results show that as-synthesized Cu nanoparticles possess excellent anti-wear properties as an additive in liquid paraffin. The reason lies in that as-synthesized surface-capped Cu nanoparticles are able to deposit on sliding steel surface and form a low-shearing-strength protective layer thereon, showing promising application as an environmentally acceptable lubricating oil additive, owing to its free phosphorus and sulfur elements characteristics. Originality/value – Oil-soluble surface-modified Cu nanoparticles without phosphorus and sulfur were synthesized and its tribological properties as lubricating oil additives were also investigated in this paper. These results could be very helpful for application of Cu nanoparticles as environment-friendly lubricating oil additives.

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

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.

Tribological properties of Al2O3 nanoparticles as lubricating oil additives

2014 ◽  
Vol 40 (5) ◽  
pp. 7143-7149 ◽  
Author(s):  
Ting Luo ◽  
Xiaowei Wei ◽  
Xiong Huang ◽  
Ling Huang ◽  
Fan Yang
Keyword(s):  
Tribological Properties ◽  
Lubricating Oil ◽  
Al2o3 Nanoparticles ◽  
Oil Additives ◽  
Lubricating Oil Additives

Preparation and tribological properties of complex nanoparticle styrene/calcium borate with core-shell structure

2014 ◽  
Vol 66 (4) ◽  
pp. 525-532 ◽  
Author(s):  
Liu Ping ◽  
Wang Dongyun ◽  
Li Yanbin ◽  
Guo Yanqing ◽  
Hao Lifeng
Keyword(s):  
Tribological Properties ◽  
Shell Structure ◽  
Lubricating Oil ◽  
Structure Characteristic ◽  
Core Shell ◽  
Calcium Borate ◽  
Content Type ◽  
X Ray ◽  
Novel Complex ◽  
Core Shell Structure

Purpose – The purpose of this paper is to develop a potential nanoparticles lubricant additive for solving the problem of the insolubility and stable dispersity; the complex nanoparticles with core-shell structures are less studied in the field. Therefore, this paper determines novel complex nanoparticles and their tribological properties. Design/methodology/approach – According to the conventional preparation method, the complex nanoparticle styrene/calcium borate (PS/O-CaB) was synthesized. The microstructures of the as-obtained samples were characterized by X-ray diffraction infrared spectroscopy and thermogravimetric analysis. Tribological properties of PS/O-CaB used as lubricating oil additive were evaluated on four-ball tribometer. The worn surface of the steel ball was investigated by a three-dimensional non-contact surface profilometer and X-ray photoelectron spectroscopy (XPS). Findings – The results of the structure characteristic indicate two different crystalline forms, namely, Ca2B6O11 and Ca2B2O5, and the average size of calcium borate nanoparticles in PS/O-CaB is about 20-40 nm. Moreover, the good tribological properties are due to a wear resistance film containing both depositions and the tribochemical reaction products which comprise B2O3, FeB and Fe2O3. Originality/value – Novel complex nanoparticles with core-shell structure (PS/O-CaB) were successfully prepared. Moreover, the PS/O-CaB shows excellent tribological capacity such as load-carrying, friction-reducing and antiwear property.

Preparation and tribological properties of BN/calcium borate nanocomposites as additive in lubricating oil

2018 ◽  
Vol 70 (1) ◽  
pp. 105-114 ◽  
Author(s):  
Yanfei Yang ◽  
Xiaobo Wang ◽  
Sen Mei ◽  
Xing Zhu ◽  
Shiqiang Chen ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Optical Microscope ◽  
Lubricating Oil ◽  
Core Shell ◽  
Calcium Borate ◽  
Wear Area ◽  
Content Type ◽  
X Ray ◽  
Friction Tester ◽  
Transmission Electron

Purpose The purpose of this paper is to investigate the tribological performance and mechanisms of BN/calcium borate nanocomposites (BCBNs) as additives in lubricating oil. Design/methodology/approach BCBNs were prepared by heterogeneous deposition method. And the morphology and structure of samples were analysed by transmission electron microscopy, Fourier transform infrared spectra and X-ray powder diffraction pattern. The maximum non-seizure load (PB) of samples was tested using four-ball friction tester. The average friction coefficients and wear tracks were obtained. In addition, tribological mechanism was also investigated using optical microscope, energy dispersive spectroscopy and X-ray photoelectron spectroscope. Findings It was found that the nanocomposites present core-shell nanostructure with the thickness of shell around 12 nm and the diameter of particles 100-200 nm, and tribological tests indicate that the PB value of BCBNs was increased by 113 per cent, whereas the average friction coefficient was decreased by 23.6 per cent and the bloom’s wear area was also decreased by 25.2 per cent. Originality/value This paper involves investigation on tribological properties and mechanism of the BCBNs with core-shell structure.

scholarly journals Tribological properties of WS2/graphene nanocomposites as lubricating oil additives

RSC Advances ◽  
2017 ◽  
Vol 7 (23) ◽  
pp. 14060-14068 ◽  
Author(s):  
Dan Zheng ◽  
Yan-ping Wu ◽  
Zheng-yang Li ◽  
Zhen-bing Cai
Keyword(s):  
Tribological Properties ◽  
Lubricating Oil ◽  
Graphene Nanocomposites ◽  
Coordinate Method ◽  
Oil Additives ◽  
Polar Coordinate ◽  
Nano Additives ◽  
Lubricating Oil Additives

Comparison of the lubricating mechanisms of nano-additives (graphene, WS2 nanoparticles, and WS2/graphene nanocomposites) was carried out using a simplified polar coordinate method.

Energy Dispersive XRF Analysis of Lubricating Oil Additives with Secondary Target Excitation and the EXACT Fundamental Parameters Program

1981 ◽  
Vol 25 ◽  
pp. 173-176
Author(s):  
Kenneth C. Stehr
Keyword(s):  
Quality Control ◽  
Petroleum Industry ◽  
Energy Dispersive ◽  
Lubricating Oil ◽  
Accurate Analysis ◽  
X Ray ◽  
Fundamental Parameters ◽  
Unknown Sample ◽  
Oil Additives ◽  
Lubricating Oil Additives

The need for rapid and accurate analysis of lubricating oil additives is firmly established by the petroleum industry. The application of energy dispersive X-ray fluorescence spectrometry techniques to this analysis is a valuable aid in achieving reliable and fast quality control of these product types.Due to the large concentration variations possible for the elements of interest within these materials (principally Zn, Ca, P, S at 0-20%), interelement effects can become significant. In order to correct for interelement effects, historical XRF methods have relied on a large number of standards for each element to be determined or matrix matching with standards closely bracketing the unknown sample concentrations.

The X-Ray Emission Analysis of Thin Films Produced by Lubricating Oil Additives

1963 ◽  
Vol 17 (1) ◽  
pp. 17-19 ◽  
Author(s):  
T. P. Schreiber ◽  
A. C. Ottolini ◽  
J. L. Johnson
Keyword(s):  
Thin Films ◽  
Lubricating Oil ◽  
Emission Analysis ◽  
X Ray ◽  
Oil Additives ◽  
Lubricating Oil Additives
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