Multifunctional lubricant additive based on difluoroboron derivatives of a diphenylamine antioxidant

Wang, Shengpei; Yu, Shasha; Feng, Jianxiang; Liu, Shenggao

doi:10.1039/c9ra05490a

Cited by 9 publications

(4 citation statements)

References 52 publications

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“…By mixing two selected antioxidants (AOLA and EAOLA) into tung oil, respectively, the OOT of tung oil was increased from 121.9°C to 138.5°C and 146.5°C, respectively, indicating that all selected antioxidants oxidants can improve the OOT of tung oil to a certain extent. Among the two antioxidants, the antioxidant EAOLA, with more phenolic hydroxyl groups, has the best antioxidant performance [35], which further proves that EAOLA is the most suitable antioxidant for tung oil.…”

Section: Effect Of Lubricant Additives On Oxidation Stabilitymentioning

confidence: 71%

Multifunctional Lubricant Additive Improves Lubrication and Antioxidation Properties of Tung Oil

Yao¹,

Ding²,

Li³

et al. 2023

Journal of Renewable Materials

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It is of considerable significance to develop efficient and environmentally friendly machinery lubricant additives because of the increasing depletion of petrochemical resources and severe environmental problems. Herein, we proposed a facile strategy to synthesize a multifunctional vegetable oil-based lubricant via the lignin derivative vanillin coupled to amine and diethyl phosphite to produce a lubricating additive with both extreme pressure and antioxidant properties. Compared with pure tung oil, the lubricating and antioxidant performance of tung oil is significantly improved after adding additives. Adding the 1.0 wt% additive to the tung oil reduced the friction wear coefficient and the volume, and the oxidation induction time was much longer than pure tung oil.

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Section: Effect Of Lubricant Additives On Oxidation Stabilitymentioning

confidence: 71%

Multifunctional Lubricant Additive Improves Lubrication and Antioxidation Properties of Tung Oil

Yao¹,

Ding²,

Li³

et al. 2023

Journal of Renewable Materials

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“…Some efforts have been made towards the synthesis of heterocyclic compounds such as triazoles based multifunctional additives free from SAPS (sulfated ash, phosphorus, and sulfur) 12 . Many attempts have been made in the direction of modification in boron and molybdenum‐based compounds (molybdenum‐containing mercaptotriazine and difluoroboron derivatives of a diphenylamine) provide reaction sites and introduce multifunctionality due to the availability of polar groups 13,14 . Borated PIBSI is a widely used commercial multifunctional additive to demonstrate dispersancy, anti‐oxidant and anti‐wear activities.…”

Section: Introductionmentioning

confidence: 99%

“…12 Many attempts have been made in the direction of modification in boron and molybdenum-based compounds (molybdenum-containing mercaptotriazine and difluoroboron derivatives of a diphenylamine) provide reaction sites and introduce multifunctionality due to the availability of polar groups. 13,14 Borated PIBSI is a widely used commercial multifunctional additive to demonstrate dispersancy, anti-oxidant and anti-wear activities. Dodecenylsuccinic amide of Nphenyl-p-phenylenediamine also reported in the literature as multifunctional additive as anti-oxidant, anti-corrosive, lubricity improver, deposit control additive for engine oil application.…”

Section: Introductionmentioning

confidence: 99%

Amide polymers based on N‐phenyl‐p‐phenylenediamine with α‐olefins‐co‐maleic anhydride as multifunctional additives for lubricant application

Faujdar

Singh

2022

Polymers for Advanced Techs

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The high temperature and harsh oxidizing conditions in engine sump results in sludge and varnish deposits in the engine, due to which wear debris and corrosion developed in the internal parts of the engine. This is also responsible for the increased oil viscosity. To address these problems, four polymeric multifunctional amides of N‐phenyl‐p‐phenylenediamine were synthesized from copolymer intermediates poly(α‐olefins‐co‐maleic anhydride) having C‐12, C‐14, C‐16, and C‐18 chain length. This article describes the systematic study of poly(α‐olefin‐co‐maleic anhydride)amides chemistry as multifunctional lubricant additives. Molecular elucidation was carried out by Fourier transform infrared and nuclear magnetic resonance while molecular weight and thermal stability were measured by gel permeation chromatography and thermogravimetric analysis. Standard methods were used to analyze the viscosity‐temperature relationship along with detergent‐dispersant, anti‐oxidant, and anti‐corrosion activities in reference base oil at varying concentration levels. All the prepared polymer compounds effectively addressed the concern problems, but poly(octadecene‐co‐maleic anhydride)amide of N‐phenyl‐p‐phenylenediamine showed better performance over the other additives due to the increased solubility. The pour point depressed from the base value −15 to −30°C while viscosity index (VI) increased to 197 from 178 with longer chain additive at 5000 ppm concentration. Dispersancy was found to be increased by 145%, while as far detergency was concerned, sludge deposition was reduced to 20.1 mg from 87.5 mg base value of reference base oil at 5000 ppm. 2,2‐diphenyl‐1‐picrylhydrazyl assay was used to determine the anti‐oxidant activity and at 1000 ppm, long alkylated polymer shows the excellent result by increasing the inhibition efficiency by 95.58% while the same additive impart the best results at 5000 ppm by reducing the corrosion and penetration rate by 75.80% and 75.43% respectively. Rheology also studied to examine the shear and temperature effect on the dynamic viscosity of the reference oil.

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“…Therefore, lubricants are fairly straightforward to be contaminated, oxidized and even invalidated as a result of their interaction with the friction pairs under various extreme conditions (Bakunin et al , 2004; Ju et al , 2020; Usman, 2020). To resolve those problems, it is indispensable to introduce lubricant additives into the lubricating systems to guarantee the stable performance of lubricants (Ye et al , 2020; Jiang et al , 2020; Zhan et al , 2019; Wang et al , 2019).…”

Section: Introductionmentioning

confidence: 99%

Antioxidant behavior and tribological performance of a novel multifunctional additive in complex lithium grease

Chao

Jin

Gong

et al. 2021

ILT

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Purpose This paper aims to contrastively investigate the antioxidant behavior and tribological performance of a novel multifunctional additive (PBT) and dialkyldithiophosphate (ZDDP) in complex lithium grease (CLG). Design/methodology/approach PBT was successfully synthesized through esterification reaction. The antioxidant behavior of PBT and ZDDP was investigated by thermal analysis, and meanwhile, their tribological performance was evaluated by Optimol SRV-IV oscillating reciprocating friction and wear tester (SRV-IV test) and MRS-1J four-ball tester (Four-ball test). Furthermore, their anticorrosion ability was determined by copper strip corrosion test. Findings Four-ball tests showed that the extreme pressure property of PBT was a little inferior to that of ZDDP. Besides, all the other results demonstrated that PBT showed more superior antioxidation stability, friction-reduction and antiwear ability, as well as anticorrosion performance than ZDDP. Originality/value This work provides a study of hindered phenol derivative as a multifunctional additive in lubricant grease, which can contribute to the development of substitution of ZDDP.

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Multifunctional lubricant additive based on difluoroboron derivatives of a diphenylamine antioxidant

Abstract: Difluoroboron derivatives of an antioxidant with excellent antioxidation and antiwear properties provide a new strategy for metal-free and phosphorus-free multifunctional additives.

Cited by 9 publications

References 52 publications

Multifunctional Lubricant Additive Improves Lubrication and Antioxidation Properties of Tung Oil

Multifunctional Lubricant Additive Improves Lubrication and Antioxidation Properties of Tung Oil

Amide polymers based on N‐phenyl‐p‐phenylenediamine with α‐olefins‐co‐maleic anhydride as multifunctional additives for lubricant application

Antioxidant behavior and tribological performance of a novel multifunctional additive in complex lithium grease

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