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.

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.

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.

Synthesis and Tribological Properties of S- and P-Free Borate Esters With Different Chain Lengths

2011 ◽  
Vol 133 (2) ◽  
Author(s):  
Guangbin Yang ◽  
Zhanming Zhang ◽  
Guihui Li ◽  
Jinfeng Zhang ◽  
Laigui Yu ◽  
...  
Keyword(s):  
Alkyl Chain ◽  
Liquid Paraffin ◽  
Alkyl Chain Length ◽  
Lubricating Oil ◽  
Oil Additives ◽  
Borate Esters ◽  
Lubricating Oil Additives ◽  
Steel Balls ◽  
Chain Lengths ◽  
Antiwear Ability

Three kinds of S- and P-free borate esters containing N with different alkyl chain lengths were prepared by using boric acid, ethanolamine, and alkyl-alcohol as the starting materials. The chemical structure of the products was analyzed by means of Fourier transformation infrared spectrometry, elemental analysis, and so on. The thermal stability of the products was evaluated by thermogravimetric analysis. The tribological properties of the synthesized borate esters as lubricating oil additives in liquid paraffin were evaluated using a four-ball friction and wear tester while the morphologies of the worn scars of the steel balls were observed using a scanning electron microscope. The chemical components on the worn surfaces of the steel balls were analyzed using an X-ray photoelectron spectroscopy. Results show that all the three kinds of synthetic borate esters as additives in liquid paraffin possess good antiwear performance and may be used as promising S- and P-free environmentally acceptable lubricating oil additives. Particularly, borate ester with short alkyl chain length at a low concentration in liquid paraffin was more effective in reducing wear, and the antiwear ability of the additives decreased with increasing alkyl chain length. The antiwear ability of the N-containing borate esters as additives in liquid paraffin might be closely related to the formation of hydrogen bonds via N with a high electronegativity and small atomic radius and the easy permeation of electron-deficient B on the rubbing steel surfaces.

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

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.

Tribological and Oxidation Properties Study of a Kind of Sulfonate-Modified Nano Na2CO3 and K2CO3

2011 ◽  
Vol 694 ◽  
pp. 98-102 ◽  
Author(s):  
Zhong Yi He ◽  
Li Ping Xiong ◽  
Jun Xiao Wang ◽  
Jian Wei Qiu ◽  
Xi Sheng Fu
Keyword(s):  
Thermal Stability ◽  
Free Energy ◽  
Tribological Properties ◽  
Antioxidant Properties ◽  
Lubricating Oil ◽  
Base Oil ◽  
Oil Additives ◽  
Oxidation Properties ◽  
Lubricating Oil Additives

The tribological properties of a middle base value metal alkali sulfonate-modified nano Na2CO3 and K2CO3 as lubricating oil additives were introduced in this paper, and its collaboration with the ashless antioxidant properties were evaluation by using PDSC. The results show that the product possesses good tribological properties, thermal stability, and a good synergistic antioxidation effect with ashless antioxidant, it mainly to increase oxidation free energy of base oil.

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