Tribology, lubricants and lubrication engineering — a review

Bartz, W. J.

doi:10.1016/0043-1648(78)90019-4

Cited by 34 publications

(17 citation statements)

References 53 publications

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“…Viscosity is one of the important characteristics of lubricating oils (Bartz, ; Neveu et al, ). In mechanical systems, fluid viscosity leads to the formation and strength of lubricating films that protect the metal parts from friction and wear.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Alkyl Sulfur‐Functionalized Oleic Acid‐Based Polymethacrylates and Their Application as Viscosity Index Improvers in a Mineral Paraffinic Lube Oil

Lomège

Négrell

Robin

et al. 2019

J Americ Oil Chem Soc

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This work describes the synthesis of alkyl sulfur‐functionalized polymethacrylate‐based Viscosity Index Improvers (VII) derived from oleic acid (OLA) for mineral paraffinic lubricating oils. In this strategy, OLA was first quantitatively ramified by alkyl thiols containing long aliphatic chains through thiol‐ene coupling as demonstrated by 1H NMR spectroscopy with the complete consumption of OLA internal double bonds. The resulting alkyl sulfur‐functionalized OLA‐based derivatives were methacrylated through Steglich esterification in order to afford highly suitable hydrophobic OLA‐based monomers which, as far as we know, have not been described yet in the current literature. High polymethacrylate molecular weights were reached through radical polymerization despite the long alkyl pendant chains contained in their backbones. Finally, the resulting alkyl sulfur‐functionalized OLA‐based polymethacrylates have been blended in a mineral paraffinic oil (MPO) of reference at 5 wt% and evaluated as VII. Rheological measurements revealed that polymer thickening powers were significantly improved in oil with temperature and promoted by increasing the pendant alkyl thiol contained in polymer backbones. Moreover, the viscosity index of MPO was significantly improved with the addition of both synthesized homopolymers which confirmed their efficiency as VII. In the meantime, these results have been compared with a previously reported polymer, the poly(2‐[methacryloyloxy]ethyl oleate) (PMAEO), which demonstrated a lower VII efficiency compared with its analogous polymethacrylates containing an additional alkyl chain in their pendant chains.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Alkyl Sulfur‐Functionalized Oleic Acid‐Based Polymethacrylates and Their Application as Viscosity Index Improvers in a Mineral Paraffinic Lube Oil

Lomège

Négrell

Robin

et al. 2019

J Americ Oil Chem Soc

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“…It is also prevent further oxidative decomposition of the lubricating oil. The polar nitrogen moiety can provide the film‐forming tendency to the molecules, which are leading in incorporating the additive properties like antiwear, antifriction, and resistance toward corrosion (Ahmed and Nassar, 2011; Bartz, 1978; Mang and Dresel, 2007). Since the PPA‐DDSA has diphenylamine moiety along with polar amide group so its lubricity characteristics were also evaluated by performing the four‐ball tests as per ASTM D4172.…”

Section: Resultsmentioning

confidence: 99%

“…Lubricity is the important characteristic, which an engine lubricant must possess to a high extent along with deposit control. Proper lubrication leads by the formation of a thin film on the tribological surfaces, thereby reducing the metal to metal contact (Bartz, 1978; Mang and Dresel, 2007). The use of the appropriate lubricity additive is not only essential to reduce the wear and tear of the mechanical parts but also to increase the lubricant operational life.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Dodecenylsuccinic Amide of n‐Phenyl‐p‐Phenylenediammine as Novel Multifunctional Lubricant Additive for Deposit Control and Lubricity

Faujdar

Negi

Bhonsle

et al. 2020

J Surfact & Detergents

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A novel multifunctional amide additive N-phenyl-p-phenylenediamine-dodecenylsuccinic anhydride (PPA-DDSA) was synthesized by the reaction of DDSA and N-phenyl-p-phenylenediamine. The successful synthesis of amide additive was confirmed by various analytical techniques like Fourier Transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, and thermogravimetric analysis. Performance of prepared additive was evaluated as multifunctional additive for anti-oxidant, detergent dispersant, anti-corrosion, and lubricity properties. The MAK-500 ® mineral base oil and synthetic polyol base oil were used as a reference. The antioxidant property was evaluated by using the 2,2-diphenyl-1-picrylhydrazyl method, which revealed that PPA-DDSA was better antioxidant than PPA and gallic acid but less effective than butylated hydroxytoluene. PPA-DDSA was found to be excellent detergent dispersant in polyol in comparison to the MAK-500. At 4000 ppm additive concentration, the coking value is reduced to 0.0205 g from the value of 0.0840 g for blank polyol while the % dispersancy increased to 40.67 from 20.00 for polyol base oil. The antiwear property was observed to be better in the MAK-500 while the antifriction potential was found to be better in polyol base oil. The average wear scar is reduced from 881 to 550 μM at 2000 ppm concentration in MAK-500 base oil, while at 3000 ppm PPA-DDSA concentration, the average friction coefficient reduces to 0.0826 from 0.1276 for blank polyol.

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“…These compounds often contain sulfur and phosphorus, for instance, in form of triphenyl phosphorotionate and zinc dialkyldithiophosphate. Physical properties like viscosity can be influenced, for example, by viscosity index improvers, whose chemical composition depends on the application's temperature …”

Section: Types Of Oils and Fatsmentioning

confidence: 99%

Low‐field NMR for quality control on oils

Rudszuck

Förster

Nirschl

et al. 2019

Magnetic Reson in Chemistry

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Oil is a prominent, but multifaceted material class with a wide variety of applications. Technical oils, crude oils as well as edibles are main subclasses. In this review, the question is addressed how low-field NMR can contribute in oil characterization as an analytical tool, mainly with respect to quality control. Prerequisite in the development of a quality control application, however, is a detailed understanding of the oils and of the measurement. Low-field NMR is known as a rich methodical toolbox that was and is explored and further developed to address questions about oils, their quality, and usability as raw materials, during production and formulation as well as in use.

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Tribology, lubricants and lubrication engineering — a review

Cited by 34 publications

References 53 publications

Synthesis of Alkyl Sulfur‐Functionalized Oleic Acid‐Based Polymethacrylates and Their Application as Viscosity Index Improvers in a Mineral Paraffinic Lube Oil

Synthesis of Alkyl Sulfur‐Functionalized Oleic Acid‐Based Polymethacrylates and Their Application as Viscosity Index Improvers in a Mineral Paraffinic Lube Oil

Efficiency of Dodecenylsuccinic Amide of n‐Phenyl‐p‐Phenylenediammine as Novel Multifunctional Lubricant Additive for Deposit Control and Lubricity

Low‐field NMR for quality control on oils

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