Thermocleavable friction modifiers for controlled release in lubricants

Faig, Jonathan J.; Zhang, Yingyue; Ng, Man Kit; Luo, Shuji; Shough, Anne Marie; Schilowitz, Alan M.; Dierolf, Marcia; Uhrich, Kathryn E.

doi:10.1016/j.triboint.2017.11.030

Cited by 11 publications

(8 citation statements)

References 15 publications

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“…Consider this as the consequence of defects that occurred during the failure of the oil wedge of the cooling tower pumping unit of SD RNPP Unit 1 in the operational event of 2021 (Kuznetsov et al, 2022). This statement is supported by the results of Faig et al (2018), who noted that the content of soluble gases, in particular hydrocarbons, CO, CO 2 , and hydrogen in energy oils characterise the presence of defects in the friction surface areas. Notably, the presence of soluble hydrocarbon gases, CO, CO 2 , and hydrogen affects the content of the antioxidant additive, and in the process of their development, oil wear occurs with a loss of protective properties (Zaitsev et al, 2015).…”

Section: Source: Developed By Authorssupporting

confidence: 55%

Improvement of methods for controlling power oil of cooling tower recycling water supply units at Rivne nuclear power plant

Kuznietsov¹,

Tykhomyrov²,

Biedunkova³

et al. 2022

Scientific Horizons

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The relevance of the study is conditioned upon the fact that at nuclear power plants, water pumping units using energy oils are operated in the heat exchange equipment of power units. The diagnostic criteria of oils allow identifying defects in the operation of technological equipment. The purpose of the work – to increase the reliability of the operation of oil-filled power equipment by improving the monitoring of the physical and chemical properties of power oil TP-30. The main attention is devoted to increasing the reliability of the operation of oil-filled power equipment by improving the monitoring of the physical and chemical properties of TP-30 power oil. Experimental studies were conducted by chromatography, and gas and liquid extraction using appropriate laboratory equipment. When exploring the content of chemical elements in the segments of the thrust bearing of the cooling tower pumping unit, which is based on Sn, an increase in the content of copper Cu and Sb was observed, which exceeded the standard by an average of 1.2 and 1.1 times, respectively. Most of the analysed physical indicators of oil quality (water content, kinematic viscosity, flash point, acid number) did not demonstrate deviations from the standard values. Only an increase in the mass fraction of mechanical impurities by 0.0026% relative to the standard was noted during the incoming inspection of TP-30 oil. The results of the operational control of the oil in terms of a set of physical indicators fully complied with the established technological standards. The highest content of soluble gases in the oil (0.56% by volume) was recorded for propylene (C3 H6 ). It is recommended to use the relative content of soluble gases in Tp-30 oil to C3 H6 when identifying degradation processes. The absence of residuals of circulating power oil TP-30 in the surface waters of the Styr River during the operational event was established. Generalisations have been generalised about the necessity of expanding the diagnostic criteria for the quality of TP-30 oil, in particular, expanding the list of its physical indicators. In practical terms, the results obtained can be useful for monitoring the quality of other brands of petroleum oils in the systems of turbine units of nuclear power plants, which is important in terms of the safe operation of heat exchange equipment

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Section: Source: Developed By Authorssupporting

confidence: 55%

Improvement of methods for controlling power oil of cooling tower recycling water supply units at Rivne nuclear power plant

Kuznietsov¹,

Tykhomyrov²,

Biedunkova³

et al. 2022

Scientific Horizons

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“…S3c and S3d were synthesized following a modified literature procedure. [45] The 2,3-Bis(stearoyl) tartaric acid (1c): Di-tert-butyl L-tartrate (1.50 g, 5.72 mmol), stearic acid (3.58 g, 12.6 mmol), EDCI (3.29 g, 17.2 mmol), and DMAP (1.54 g, 12.6 mmol) were dissolved in anhydrous DCM (30.0 mL) in a 100 mL round bottom flask under nitrogen and stirred overnight at room temperature. The reaction mixture was diluted with additional DCM (50 mL) and washed with 10% KHSO 4 (3 Â 100 mL) and saturated NaCl solution (1 Â 40 mL).…”

Section: Methodsmentioning

confidence: 99%

CD36‐Binding Amphiphilic Nanoparticles for Attenuation of α‐Synuclein‐Induced Microglial Activation

Zhao

Francis

Song

et al. 2022

Advanced NanoBiomed Research

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Neuroinflammation is one of the hallmarks contributing to Parkinson's disease (PD) pathology, where microglial activation occurs as one of the earliest events, triggered by extracellular α‐synuclein (aSYN) binding to the cluster of differentation 36 (CD36) receptor. Herein, CD36‐binding nanoparticles (NPs) containing tartaric acid–based amphiphilic macromolecules (AMs) are rationally designed to inhibit this aSYN–CD36 binding. In silico docking reveals that four AMs with varying alkyl side chain lengths present differential levels of CD36 binding affinity and that an optimal alkyl chain length promotes the strongest inhibitory activity toward aSYN–CD36 interactions. In vitro competitive binding assays indicate that the inhibitory activity of AM‐based NPs plateaus at intermediate side chain lengths of 12 and 18 carbons, supporting the in silico docking predictions. These intermediate‐length AM NPs also has significantly stronger effects on reducing aSYN internalization and inhibiting proinflammatory molecules tumor necrosis factor α (TNF‐α) and nitric oxide from aSYN‐challenged microglia. All four NPs modulate the gene expression of aSYN‐challenged microglia, downregulating proinflammatory genes TNF, interleukin 6 (IL‐6), and IL‐1β, and upregulating anti‐inflammatory genes transforming growth factor β (TGF‐β) and Arg1 expression. Herein, overall, a novel polymeric nanotechnology platform is represented that can be used to modulate aSYN‐induced microglial activation.

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“…The general mechanism by which HEE compounds can act as a lubricity improver on low sulphur diesel fuel is shown in Figure 2. when HEE is added to diesel fuel, polar heads of HEE compounds attract to the metal surface and upon interacting with a metal surface, the aliphatic chains can orient themselves to forms a surface boundary layer/film to prevent direct metal/metal contact [11,21].…”

Section: Synthesis Of Hydroxy Ethyl Ester (Hee)mentioning

confidence: 99%

Synthesis of Bio-additive for Low Sulphur Diesel: Transesterification of Soybean Oil and Ethylene Glycol using K2CO3 Catalyst

Hariyanto

Firmansyah

Burhan

et al. 2021

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The desulphurization process of diesel fuel is carried out to reduce the amount of SO2 emissions that can cause acid rain. However, the desulphurization process in diesel fuel not only removes the sulfur compounds but polyaromatic and polar compounds are also eliminated during this process. The loss of these two compounds can reduce the lubricity properties of diesel fuel. Therefore, it is necessary to add an additive compound that can increase the lubricity properties. In this research, 2-hydroxyethyl ester (HEE) was synthesized as an additive to increase the lubricity of diesel fuel. This compound was synthesized through the transesterification reaction of soybean oil and ethylene glycol with K2CO3 as the base catalyst. The composition of the synthesized additives was analyzed using the Gas Chromatography-Mass Spectrometry (GC-MS). Based on the results of GC-MS spectrum analysis, it is known that the 2-hydroxyethyl ester compound has been formed with a yield of 66.5% (relative to the area of the chromatogram peak). The HEE compound obtained is a mixture of 2 hydroxyethyl palmitate, 2 hydroxyethyl linoleate, 2 hydroxyethyl stearate, 2 hydroxyethyl arachidonate, 2 hydroxyethyl nervate, and 2 hydroxyethyl behenate.

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Thermocleavable friction modifiers for controlled release in lubricants

Cited by 11 publications

References 15 publications

Improvement of methods for controlling power oil of cooling tower recycling water supply units at Rivne nuclear power plant

Improvement of methods for controlling power oil of cooling tower recycling water supply units at Rivne nuclear power plant

CD36‐Binding Amphiphilic Nanoparticles for Attenuation of α‐Synuclein‐Induced Microglial Activation

Synthesis of Bio-additive for Low Sulphur Diesel: Transesterification of Soybean Oil and Ethylene Glycol using K2CO3 Catalyst

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