Tribological study of a highly hydrolytically stable phenylboronic acid ester containing benzothiazolyl in mineral oil

Li, Zhipeng; Li, Xiufeng; Zhang, Yawen; Ren, Tianhui; Yang, Zhao; Zeng, Xiangqiong; Heide, Emile van der

doi:10.1016/j.apsusc.2014.04.116

Cited by 33 publications

(28 citation statements)

References 32 publications

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“…5a) including the carbonyl C=O stretching band at 1746.3 cm -1 , the CH 2 and CH 3 scissoring vibration at 1464.5 and 1377.3 cm -1 , the overlapping of the methylene (-CH 2 ) rocking vibration at 722.9 cm -1 , as well as the C-O stretching at 1163.7 cm -1 . Absorption bands located at 3007.3, 2925.3 and 2854.4 cm -1 arise due to the CH 2 stretching and the anti-symmetric CH 2 and symmetric CH 2 stretching, respectively [28][29][30]. Compared with the spectrum of uncharged lubricant droplets, the spectra of lubricant droplets under different charging voltage conditions do not change too much, which suggests that there are no formations of new functional groups for the lubricant after contact charging.…”

Section: Charging Propertymentioning

confidence: 75%

Tribological Performance and Lubrication Mechanism of Contact-Charged Electrostatic Spray Lubrication Technique

Huang

Yao

et al. 2015

Tribol Lett

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To minimize friction at the chip-tool interface and the amount of lubricant usage, a new near-dry machining technique called ''contact-charged electrostatic spray lubrication (CCESL) technique'' was proposed. The chargeability, penetrability, and wettability of lubricant droplets under CCESL condition were analyzed. The atomization and tribological performance of the CCESL technique were compared with those of the existing minimal quantity lubrication (MQL) technique under different testing conditions. The experimental results suggest that the CCESL technique considerably improves the anti-wear and anti-friction properties compared with the existing MQL technique. In addition, to understand its lubrication mechanism, the morphology and main elements of the worn surface were characterized using an optical microscope and X-ray photoelectron spectroscopy, respectively. In the CCESL technique, an ordered molecule layer which provides effective lubrication is formed on the rubbing surface as polar functional groups in the lubricant molecule are oriented. The enhanced tribological performance is attributed to the fact that the technique can provide more abundant lubricant and oxygen for the interface of frictional pairs to promote the formation of an abundant lubricating layer comprising adsorption and oxide films, which improve the worn surface quality.

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Section: Charging Propertymentioning

confidence: 75%

Tribological Performance and Lubrication Mechanism of Contact-Charged Electrostatic Spray Lubrication Technique

Huang

Yao

et al. 2015

Tribol Lett

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“…The relationship between the structural parameters and the WS values was quantified by a partial least squares (PLS) algorithm. The regression coefficient R 2 , the cross-validation coefficient R 2 (LOO) , and q 2 were also calculated [3][4][5][6]22]. q 2 was computed according to the formula:…”

Section: Comfa-qstr and Comsia-qstr Lubricant Additive Models For Antmentioning

confidence: 99%

Isosteric design of friction-reduction and anti-wear lubricant additives with less sulfur content

et al. 2017

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Abstract:To reduce harmful sulfur content in lubricant additives, making use of isosterism has been shown to be an effective strategy. When thiobenzothiazole compounds were used as templates, the exchange of sulfur atoms in the thiazole ring with oxygen atoms and NH groups produced twelve isosteres. Similarly, 2-benzothiazole-S-carboxylic acid esters were used as template molecules to produce six isosteres. About 30% of the isosteres exhibited a satisfactory deviation of ±5% relative to the template, ignoring the specific changes in the base oils, the differences in molecular structure, and the friction or wear properties. The template molecules and isosteres in triisodecyl trimellitate exhibited better tribological properties than in trimethylolpropane trioleate or bis(2-ethylhexyl) adipate. Comparative molecular field analysis (CoMFA)-and comparative molecular similarity index analysis (CoMSIA)-quantitative structure tribo-ability relationship (QSTR) models were employed to study the correlation of molecular structures between the base oils and additives. The models indicate that the higher the structural similarities of the base oils and additives are, the more synergetic the molecular force fields of the lubricating system are; the molecular force fields creating synergistic effects will improve tribological performance.

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“…The B 1s peak at 193.2 eV is attributed to B-O bond [18], which indicates that BTES was decomposed, and the borate part was transformed into B-O containing groups.…”

Section: Xps Analysismentioning

confidence: 99%

“…9, the C 1s peak at 284.8 eV corresponds to the C-C or C-H bonds [17] in BTES and RSO, indicating that the BTES or RSO molecules were adsorbed onto the metal surface during the friction test. The O 1s peaks at 531.6 eV and 532.8 eV correspond to iron oxide [18] and C-O bond, respectively, indicating that the BTES or RSO molecules were oxidized on the metal surface.…”

Section: Sem and Eds Analysismentioning

confidence: 99%

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Tribological study of N-containing borate derivatives and their synergistic antioxidation effects with T531

Liu

et al. 2018

Friction

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Two N-containing borates, BTES and BMES, were synthesized with dodecyl phenol, 2-(N-containing heterocyclic) ethan-1-ol, boric acid, and dibutylamine, and their tribological properties in rapeseed oil (RSO) were investigated using a four-ball tester. The results showed that the load-carrying ability (P B value) of RSO can be improved by 40.9% and 67.9%, respectively, when using 0.5 wt% BTES and BMES. Moreover, the antiwear and friction-reducing performances of the additive-containing oils increased with the additive concentration. The X-ray photoelectron spectroscopy results of the worn steel ball surfaces showed that BTES and BMES formed protective films, which contained boron oxide, iron oxide, ferrous sulfate, ferrous sulfide (for BMES), and other organic nitrogen compounds, on the metal surfaces. The better load-carrying and antiwear performances of BMES than those of BTES might be due to their different sulfur contents, which result in different tribochemical reaction films on the contact surfaces. The oxidation stability tests showed that BTES and BMES possessed synergistic antioxidation activity with N-phenyl-α-naphthylamine (T531), and consequently, the oxidation activation energy of the oil sample increased by 77.85% and 82.19%, respectively, compared with that of RSO when the oil sample contained 0.05 wt% BTES/BMES and 0.25% T531.

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Tribological study of a highly hydrolytically stable phenylboronic acid ester containing benzothiazolyl in mineral oil

Cited by 33 publications

References 32 publications

Tribological Performance and Lubrication Mechanism of Contact-Charged Electrostatic Spray Lubrication Technique

Tribological Performance and Lubrication Mechanism of Contact-Charged Electrostatic Spray Lubrication Technique

Isosteric design of friction-reduction and anti-wear lubricant additives with less sulfur content

Tribological study of N-containing borate derivatives and their synergistic antioxidation effects with T531

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