Anti-Wear Performance of Novel Tri(hydroxymethyl) Propane Esters as Additives in Rapeseed Oil

2013 ◽  
Vol 457-458 ◽  
pp. 219-222
Author(s):  
Xian Bing Ji ◽  
Yin Xia Chen
Keyword(s):  
Iron Oxide ◽  
Organic Compounds ◽  
Metal Surface ◽  
Rapeseed Oil ◽  
Protective Film ◽  
The Novel ◽  
Action Mechanism ◽  
Wear Performance ◽  
X Ray ◽  
Energy Spectrometer

Three novel B, N, S-containing tri (hydroxymethyl) propane (TMP) esters were synthesized. The anti-wear performance of the synthesized compounds as additives in rapeseed oil (RO) was evaluated with a four-ball tester. The results show that the novel TMP esters have good antiwear performance when they are used as additives in rapeseed oil under all test loads. The action mechanism was investigated through analysis of the X-ray photoelectron energy spectrometer. The results indicate that the additives in RO adsorb and react with metal surface to form a protective film composed of organic compounds, B2O3 and iron oxide.

Tribological Study of Xanthate-Containing Acetic Ester as Additives in Hydrogenated Oil

2012 ◽  
Vol 236-237 ◽  
pp. 123-127 ◽  
Author(s):  
Chao Long Li ◽  
Li Ping Xiong ◽  
Hong Liu ◽  
Li Ting Xiong ◽  
Wei Wang
Keyword(s):  
Photoelectron Spectroscopy ◽  
Protective Film ◽  
Extreme Pressure ◽  
Action Mechanism ◽  
Prepared Compound ◽  
X Ray ◽  
Hydrogenated Oil ◽  
Worn Surface ◽  
Scanning Electron ◽  
Sem Analyses

A novel ester derivative, dodecyl xanthate acetic dodecyl xanthate ester(DXAD) was synthesized and it’s tribological behaviors as additives in hydrogenated oil, were evaluated using a four-ball tester. Results show that the compound possesses good antiwear performance, extreme pressure capacity, and good friction-reducing property. The action mechanism was estimated through analysis of the worn surface with X-ray photoelectron spectroscopy (XPS) and Scanning Electron Microscope (SEM). The results of XPS and SEM analyses illustrate that the prepared compound as an additive in hydrogenated oil forms a protective film containing ferric sulfide and ferric sulfate compounds on the rubbed surface.

The Tribological Study of Novel Benzotriazolyl-Containing Anticorrosive Polysulfides in Rapeseed Oil

2008 ◽  
Vol 131 (1) ◽  
Author(s):  
Jing Li ◽  
Hua Wu ◽  
Tianhui Ren
Keyword(s):  
Photoelectron Spectroscopy ◽  
Rapeseed Oil ◽  
Molecular Design ◽  
Organic N ◽  
Frictional Pair ◽  
Protective Film ◽  
Extreme Pressure ◽  
Copper Corrosion ◽  
Thermal Stabilities ◽  
X Ray

Two novel benzotriazolyl-containing polysulfides were synthesized as a part of the efforts of molecular design. The tribological properties of the synthetic products as additives in rapeseed oil were evaluated using a four-ball machine and compared with that of diiso-butylpolysulfides (DIBPS). The copper corrosion-inhibiting performance and thermal stabilities of the additives were explored as well. The results showed that the synthetic heterocyclic polysulfides had better corrosion-inhibiting properties and thermal stability than the DIBPS. Moreover, the heterocyclic polysulfide additives can improve extreme pressure properties of rapeseed oil as well as antiwear and friction-reducing abilities. However, compared with DIBPS, the heterocyclic polysulfide additives showed a little weaker performance. Tribofilms were investigated by means of scanning electron microscopy and X-ray photoelectron spectroscopy. Surface analysis indicated that the benzotriazolyl-containing polysulfides experienced tribochemical reactions with the rubbing steel surface to generate FeS and FeS2, which together with the chemically absorbed organic N-containing species formed a surface protective film and hence significantly reduce wear of the steel-steel frictional pair. The titled synthetic compounds could be used as promising environmentally friendly multifunctional lubricating additives.

Tribochemical Study of Two Ashless Triazine Derivatives as Additives in Rapeseed Oil

2012 ◽  
Vol 496 ◽  
pp. 493-497
Author(s):  
Chao Long Li ◽  
Li Ping Xiong ◽  
Li Ting Xiong ◽  
Wei Wang
Keyword(s):  
Photoelectron Spectroscopy ◽  
Rapeseed Oil ◽  
Organic Nitrogen ◽  
Protective Film ◽  
X Ray ◽  
Load Carrying ◽  
Triazine Derivatives ◽  
Steel Balls ◽  
Nitrogen Containing Compounds ◽  
Scanning Electron

The ashless 2,4-bis-dipropylamino-6-(O,O’-dibuthyldithio- phosphate)-s-1,3,5- triazine (PrBT) and 2,4-bis-morpholinyl-6- (O,O’-dibuthyldithiophosphate) -s-1,3,5 -triazine (MoBT), were prepared and their tribological behaviors as additives in rapeseed oil(RSO) were evaluated using a four-ball tester. The worn surfaces of the steel balls were investigated by scanning electron microscopy and X-ray photoelectron spectroscopy(XPS). The results indicate that the additives possess good load-carrying capacities. Moreover, they both have good antiwear and friction-reducing property at relatively middle concentration(1~2 wt%) and under all test loads, and in some condition, these triazine derivatives can replace the zinc dialkylthiophosphate. The results of XPS analyses illustrate that the prepared compounds as additives in RSO forms a protective film containing inorganic sulfide, sulfate, oxidized compounds and organic nitrogen-containing compounds on the metal surface during the sliding process.

A Comparison between Hardness, Corrosion and Wear Performance of APS Sprayed WC-CoMo and WC-Co Coatings

2016 ◽  
Vol 254 ◽  
pp. 71-76 ◽  
Author(s):  
Norbert Kazamer ◽  
Dragos Toader Pascal ◽  
Gabriela Marginean ◽  
Viorel Aurel Şerban ◽  
Cosmin Codrean ◽  
...  
Keyword(s):  
Wear Behavior ◽  
Atmospheric Plasma ◽  
The Novel ◽  
X Ray Diffraction ◽  
Wear Performance ◽  
X Ray ◽  
Wear And Corrosion ◽  
Coating Characteristics ◽  
Hazardous Element ◽  
Plasma Sprayed

In order to be competitive, it is demanded to have thin, tough and long lasting coatings. An important aspect is to use stable deposition technologies. As Cr assures wear, corrosion and high temperature resistance, the most employed coatings in industry generally contain Cr. Nevertheless, Cr is a hazardous element for the humans’ health, therefore, sustainable alternatives are needed to be implemented. The aim of this work is to investigate the microstructure, hardness, corrosion resistance and wear behavior of the novel WC-CoMo compared to conventional WC-Co coatings. So far, WC-CoMo coatings are not part of state of the art regarding the Atmospheric Plasma Sprayed (APS) coatings. WC-Co powder in plain form and mechanically mixed with Mo was deposited using the APS method on standardized Type A Almen Strips (C67 steel). The size of the powder grains varies between 5 µm and 30 µm. The obtained samples were investigated by means of Scanning Electron Microscopy, Energy Dispersive X-Ray Spectroscopy, X-Ray Diffraction, and hardness, wear and corrosion behavior were also evaluated. Results revealed formation of different intermetallic phases around the WC particles, which have a benefic influence on the coating characteristics and microstructure.

scholarly journals Fibrillar biocomposite on the base of poly(3-hydroxybutyrate) nanofibers and iron oxide magnetic nanoparticles

2019 ◽  
Vol 489 (2) ◽  
pp. 157-160
Author(s):  
V. E. Prusakov ◽  
Yu. V. Maksimov ◽  
V. A. Beglov ◽  
M. V. Gerasimov ◽  
A. V. Bychkova ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Oxide Nanoparticles ◽  
The Novel ◽  
X Ray ◽  
X Ray Scattering ◽  
Transmission Electron ◽  
Iron Oxide Magnetic Nanoparticles

The novel biodegradable biocomposites on the base of poly(3-hydroxybutyrare) nanofibers with embedded iron oxide nanoparticles have been studied by transmission electron microscopy (TEM), Mssbayer spectroscopy, small angle X‑ray scattering (SAXS), and macroscopic magnetization techniques.

Ten-Vertex Polyhedral Monocarbaborane Chemistry. The Novel High-Yield Formation of the Ten-Vertex closo Compound [6-(PMe2Ph)-closo-1-CB9H9] from the Thermolysis of [8,8-(PMe2Ph)2-nido-8,7-PtCB9H11]

1993 ◽  
Vol 58 (12) ◽  
pp. 2924-2935 ◽  
Author(s):  
Jane H. Jones ◽  
Bohumil Štíbr ◽  
John D. Kennedy ◽  
Mark Thornton-Pett
Keyword(s):  
Nmr Spectroscopy ◽  
Diffraction Analysis ◽  
High Yield ◽  
Monoclinic Space Group ◽  
The Novel ◽  
X Ray Diffraction ◽  
Metal Centre ◽  
X Ray ◽  
Yield Formation ◽  
Boiling Toluene

Thermolysis of [8,8-(PMe2Ph)2-nido-8,7-PtCB9H11] in boiling toluene solution results in an elimination of the platinum centre and cluster closure to give the ten-vertex closo species [6-(PMe2Ph)-closo-1-CB9H9] in 85% yield as a colourles air stable solid. The product is characterized by NMR spectroscopy and single-crystal X-ray diffraction analysis. Crystals (from hexane-dichloromethane) are monoclinic, space group P21/c, with a = 903.20(9), b = 1 481.86(11), c = 2 320.0(2) pm, β = 97.860(7)° and Z = 8, and the structure has been refined to R(Rw) = 0.045(0.051) for 3 281 observed reflections with Fo > 2.0σ(Fo). The clean high-yield elimination of a metal centre from a polyhedral metallaborane or metallaheteroborane species is very rare.

scholarly journals Reversible magnetism switching of iron oxide nanoparticle dispersions by controlled agglomeration

2021 ◽  
Author(s):  
Stephan Müssig ◽  
Björn Kuttich ◽  
Florian Fidler ◽  
Daniel Haddad ◽  
Susanne Wintzheimer ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Light Scattering ◽  
Superparamagnetic Iron Oxide ◽  
Iron Oxide Nanoparticle ◽  
Oxide Nanoparticles ◽  
X Ray ◽  
X Ray Scattering ◽  
Nanoparticle Dispersions ◽  
Oxide Nanoparticle

The controlled agglomeration of superparamagnetic iron oxide nanoparticles (SPIONs) was used to rapidly switch their magnetic properties. Small-angle X-ray scattering (SAXS) and dynamic light scattering showed that tailored iron oxide...

scholarly journals Some Novel Cobalt Diphenylphosphine Complexes: Synthesis, Characterization, and Behavior in the Polymerization of 1,3-Butadiene

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 4067
Author(s):  
Giovanni Ricci ◽  
Giuseppe Leone ◽  
Giorgia Zanchin ◽  
Benedetta Palucci ◽  
Alessandra Forni ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
The Novel ◽  
X Ray Diffraction ◽  
X Ray ◽  
And Behavior

Some novel cobalt diphenylphosphine complexes were synthesized by reacting cobalt(II) chloride with (2-methoxyethyl)diphenylphosphine, (2-methoxyphenyl)diphenylphosphine, and 2-(1,1-dimethylpropyl)-6-(diphenylphosphino)pyridine. Single crystals suitable for X-ray diffraction studies were obtained for the first two complexes, and their crystal structure was determined. The novel compounds were then used in association with methylaluminoxane (MAO) for the polymerization of 1,3-butadiene, and their behavior was compared with that exhibited in the polymerization of the same monomer by the systems CoCl2(PnPrPh2)2/MAO and CoCl2(PPh3)2/MAO. Some significant differences were observed depending on the MAO/Co ratio used, and a plausible interpretation for such a different behavior is proposed.

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