Antiwear study on petroleum base oils with esters

Rajendiran, A.; Sumathi, A.; Krishnasamy, K.; Kabilan, S.; Ganguli, Debashis

doi:10.1016/j.triboint.2016.03.019

Cited by 21 publications

(6 citation statements)

References 14 publications

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“…However, the use of these liquids does not completely solve the problem, since the ability of synthetic esters to biodegrade in the natural environment decreases with increasing thermal stability of the esters. A similar pattern is observed for anti-wear properties: they usually decrease with increasing thermal stability of esters [2][3][4][5][6].…”

Section: Introductionsupporting

confidence: 72%

Studying the Possibility of Using Complex Esters as AW/EP Additives

Mukhortov¹,

Zadorozhnaya²,

Kandeva³

et al. 2019

Tribol. Ind.

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In this work, the possibility of using esters of organic acids as antiwear additives to lubricants has been investigated. Work has two targets. The first of these is the verification of theoretical statements about the mechanism of action of anti-wear additives. According to the authors ideas, the influence of additives on the formation and properties of a polymolecular adsorption layer is the predominant factor. These ideas are based on the general laws of liquids adsorption on the solid surface. In addition, they correspond to the properties of AW/EP additives used in modern lubricants. The second goal is to develop justified approaches to creating AW/EP additives for biodegradable lubricants based on vegetable oils and synthetic esters. Additives to these materials must meet several requirements. In particular, they must be chemically compatible with vegetable oils and not have bactericidal properties. For use in twostroke internal combustion engines, additives must contain a minimum amount of sulfur, phosphorus and ash elements. Esters of dibasic and tribasic organic acids with higher alcohols were chosen as promising objects of study. Studies have been conducted on the example of the monoester of maleic acid, esters of tartaric and aconitic acids with hexadecyl alcohol. The results of measurements of the anti-wear properties of these substances when added to vegetable oil are given. As a result of these tests, a high AW/EP effectiveness of aconitic ester was found. This compound also showed efficacy when it was added to petroleum oil without additives and to standard gear oil. The measurements were simultaneously carried out in the SUSU laboratories, and at Sofia University in several stands under various friction conditions. The results showed that the use of new additives in hydrocarbon petroleum oil without additives gives AW effect, which is slightly lower than ZDDP. The investigated additive can be used in standard compositions of additives to motor and transmission oils. The results of the study indicate the prospects for the use of esters of polyatomic acids as AW/EP additives for lubricants of various origins.

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Section: Introductionsupporting

confidence: 72%

Studying the Possibility of Using Complex Esters as AW/EP Additives

Mukhortov¹,

Zadorozhnaya²,

Kandeva³

et al. 2019

Tribol. Ind.

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“…In comparison to vegetable oil, it has better oxidative stability and better low-temperature properties and could be used as a green lubricant. 11 TMPTO has excellent lubricity and high viscosity index. In the ecological environment, the biodegradation rate of TMPTO can exceed 90%.…”

Section: Introductionmentioning

confidence: 99%

“…Trimethylolpropane trioleate (TMPTO) is a chemically modified product of triglyceride. In comparison to vegetable oil, it has better oxidative stability and better low-temperature properties and could be used as a green lubricant . TMPTO has excellent lubricity and high viscosity index.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Biolubricant Trimethylolpropane Trioleate and Its Lubricant Base Oil Properties

et al. 2017

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Trimethylolpropane trioleate (TMPTO) could significantly reduce environmental pollution compared to mineral oils. In this study, oleic acid (OA) and trimethylolpropane (TMP) were used to synthesize TMPTO, and the synthesis process was optimized by single-factor experiments to obtain the highest yield. First, two kinds of operating conditions (vacuum distillation and atmospheric reflux) were compared, and then four kinds of catalysts were investigated to select the most efficient catalyst in esterification. Afterward, five reaction parameters were investigated, and the optimal conditions obtained were as follows: catalyst/TMP, 3.2:1 (molar ratio) 2% (w/w) OA/TMP; temperature, 180 °C; reaction time, 3 h; and vacuum degree, 0.095 MPa. Under the optimized conditions, the TMP conversion rate reached up to 92.8%. Furthermore, TMPTO was confirmed by Fourier transform infrared spectroscopy (FTIR). Finally, the typical properties of the product were evaluated, including the kinematic viscosity at 40 and 100 °C, viscosity index, solidifying point, and thermal oxidation stability of TMPTO.

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“…Neville, et al, [13]studied and evaluated synergistic effect of various additives in lube oil and compatibility with lubricant surfaces. Rajendiranet al, [14]confirmed that substantial reduction in friction and wear can be achieved by blending with esters with minimum or no conventional additives. These additives work by reacting chemically with the interacting surfaces and form a protective tribo-film on them [4,[8][9][10].…”

Section: Introductionmentioning

confidence: 98%

Performance of Additives Concerning Synergistic Effect in Lube Oil

Kathamore,

Bachchhav,

Bagchi

2020

IJEAT

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Lubricating oils containing ester, gaining more importance due to their friction reducing ability. Screening the performance of lubricating oils prior to field test is of most significance for the new lubricant formulations. In this endeavor, six lubricating blends were formulated having variable concentration of additives (sulfur and ester) in mineral oil and screened for their performance using four-ball tribo-tester. The formulated blends were evaluated for their extreme pressure and anti-wear characteristics as per ASTM standards. Tests were conducted on DUCOM TR- 30L four-ball tester and wear scar diameter were measured on an optical microscope.Compatibility and synergy of additives have been discussed on the basis of various parameters such as anti-wear scar diameter, mean scar diameter (just below weld load), mean scar diameter (at last non-seizure load), weld load and load wear index. The findings of this study demonstrate that ester along-with sulfur not only boost anti-wear properties but also enhance load carrying capacity of oil. An addition of sulfur beyond 2 % may not yield any significant improvement of tribo-characteristics of these oils.This paper is highlighting the synergistic effect of additives to render it as suitable lubricant for metal working applications. This paper also suggested an optimum concentration of an additive for its suitability for anti-wear and/(or) extreme-pressure properties.

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Antiwear study on petroleum base oils with esters

Cited by 21 publications

References 14 publications

Studying the Possibility of Using Complex Esters as AW/EP Additives

Studying the Possibility of Using Complex Esters as AW/EP Additives

Synthesis of Biolubricant Trimethylolpropane Trioleate and Its Lubricant Base Oil Properties

Performance of Additives Concerning Synergistic Effect in Lube Oil

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