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 10 publications

(6 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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“…This phenomenon is attributed to the small steric hindrance of the imine group, allowing radicals to easily capture hydrogen. In addition, Wang et al [127,128] even introduced B and F elements into SPD and SSPD molecules to prepare BSPD, SSPD-BF1, and SSPD-BF2 compounds, as shown in Figure 16. TGA indicated that the weight loss phenomenon of BSPD occurs at relatively high temperatures, and the corresponding temperatures for BSPD at 5% and 95% weight loss are 328 and 414 • C, respectively.…”

Section: Phenolic Amine Complex and Its Derivativesmentioning

confidence: 99%

Research Progress of Antioxidant Additives for Lubricating Oils

Xia,

Wang,

Liu

et al. 2024

Lubricants

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Lubricating oils play an important role in friction-reducing and anti-wear, as well as enhancing mechanical efficiency. To improve the oxidation stability and service life of lubricating oils, the composition and structure of antioxidants should be strategically designed, and these parameters have significantly affected the performance of antioxidants in lubricating oils. Antioxidants are classified into two types based on the substrates they act on: peroxide decomposers and radical scavengers. In this review, the effects of peroxide decomposers (including sulfur compounds, phosphorus compounds, sulfur–phosphorus compounds, and sulfur–nitrogen compounds) and radical scavengers, such as hindered phenols and aromatic amines, have been discussed as additives in the antioxidant properties of lubricating oils. The results indicate that peroxide decomposers have excellent performances in lubricating oils, but high pollution of S and P is not conducive to their widespread use. On the contrary, radical scavengers also have superior antioxidant properties and no pollution, possessing the potential to replace traditional antioxidants. In addition, molecular structures with (multiple) synergistic antioxidant properties have been extensively designed and reported. This review serves as a reference for researchers to design and develop high-end new antioxidants.

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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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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 10 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

Research Progress of Antioxidant Additives for Lubricating Oils

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

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