Study of oxide nanoparticles as additives for vegetable lubricants

Trajano, Marinalva Ferreira; Moura, Edja Iandeyara Freitas; Ribeiro, Kandice Suane Barros; Alves, Salete Martins

doi:10.1590/1516-1439.228213

Cited by 44 publications

(30 citation statements)

References 10 publications

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“…These results were mostly related to the presence of epoxy functions that are known to confer rigidity to the polymers chains (Yang et al, 2008). The current literature devoted to biolubricants based on epoxidized vegetable oils report that they exhibit high VI and are generally used in a wide temperature range due to their higher viscosity compared to the raw oil, especially at high temperature (Erhan and Asadauskas, 2000;Trajano et al, 2014). Our results are in total accordance with these observations.…”

Section: Mineral Lube Oilsupporting

confidence: 90%

Epoxidized Oleic Acid‐Based Polymethacrylates as Viscosity Index Improvers

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Négrell

et al. 2019

J Americ Oil Chem Soc

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This study reports two routes for the synthesis of epoxidized oleic acid (OLA)‐based polymethacrylates. The first one consisted of the synthesis followed by epoxidation of the OLA‐based methacrylate, 2‐(methacryloyloxy)ethyl oleate (MAEO), prior to its radical polymerization. In the second pathway, MAEO was first homopolymerized to afford poly(2‐(methacryloyloxy)ethyl oleate) (PMAEO) and, then, the internal double bonds of the oleate were epoxidized at different yields ranging from 20% to 100%. All polymeric structures were confirmed using 1H nuclear magnetic resonance (NMR), and characterized through size‐exclusion chromatography (SEC), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC) analyses. The resulting polymers were then blended at 5 wt.% in a mineral paraffinic oil (MPO) and in a biobased organic triacylglycerol oil (OTO) to be evaluated as viscosity index improvers (VII). The partially epoxidized polymers up to 40% were soluble in MPO. According to a rheological study, the oil‐soluble epoxidized polymers resulting from the epoxidation of PMAEO exhibited a much higher influence on oil viscosities at high temperatures than at low temperatures compared to the low‐epoxidized PMAEO molecular weight obtained by the first strategy. Additionally, the viscosity indices of both lubricating oils were significantly improved with the addition of the epoxidized OLA‐based polymers resulting from the epoxidation of PMAEO, which confirmed their efficiency as VII.

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Section: Mineral Lube Oilsupporting

confidence: 90%

Epoxidized Oleic Acid‐Based Polymethacrylates as Viscosity Index Improvers

Lomège

Lapinte

Négrell

et al. 2019

J Americ Oil Chem Soc

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“…The use of oxide NPs (ZnO and CuO) as lubricant additives should be noted [97][98][99][100][101][102][103][104]. For example, biolubricants using vegetable oils (soybean and sunflower) with ZnO and CuO NPs as additives are biodegradable and have better performance in boundary lubrication.…”

Section: Metalsmentioning

confidence: 99%

Metal-containing nanomaterials as lubricant additives: State-of-the-art and future development

2019

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This review focuses on the effect of metal-containing nanomaterials on tribological performance in oil lubrication. The basic data on nanolubricants based on nanoparticles of metals, metal oxides, metal sulfides, nanocomposities, and rare-earth compounds are generalized. The influence of nanoparticle size, morphology, surface functionalization, and concentration on friction and wear is analyzed. The lubrication mechanisms of nanolubricants are discussed. The problems and prospects for the development of metal-containing nanomaterials as lubricant additives are considered. The bibliography includes articles published during the last five years. Friction 7(2): 93-116 (2019) | https://mc03.manuscriptcentral.com/friction Friction 7(2): 93-116 (2019) 97 |www.Springer.com/journal/40544 | Friction http://friction.tsinghuajournals.comFriction 7(2): 93-116 (2019)

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“…Thus, for the sunflower bio-lubricant, it was observed that its density is little higher than the obtained for commercial sunflower oil. This increase is due to the epoxidation reaction, which modifies its physical and chemical properties 25 . The efficiency of the epoxidation reaction was determined by iodine index, a parameter used to indicate the presence of double bonds in a fatty acid ester, which corresponds to the number of centigrams of iodine absorbed per 1 gram of fat.…”

Section: Epoxidized Sunflower Oil Characterizationmentioning

confidence: 99%

The Lubricity Analysis of Cutting Fluid Emulsions

et al. 2017

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The new generation of cutting fluids should have some characteristics, such as low toxicity and biodegradability. A bio-cutting fluid emulsion are an excellent option because they present those properties, as well as good mechanical performance. The present study aims to investigate the lubricity of O/W emulsions (cutting fluid emulsion), varying the concentration of anionic surfactant (1%, 2.5% and 5%) and epoxidized oil (5%, 10%, 15%, 20% e 25%). A sunflower oil was chemically modified by epoxidation reaction, then its viscosity, iodine and oxirane index, density, and acidity were characterized. The performances of the emulsions were evaluated using a tribometer HFRR (High Frequency Reciprocating Rig), under hydrodynamic lubrication conditions. The ball wear scars were analyzed using an optical microscopy. The results showed that a low concentration of surfactant promote friction and wear reduction. Based on the tribological performance, the emulsions with 5% and 10% of epoxidized oil are more suitable.

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Study of oxide nanoparticles as additives for vegetable lubricants

Cited by 44 publications

References 10 publications

Epoxidized Oleic Acid‐Based Polymethacrylates as Viscosity Index Improvers

Epoxidized Oleic Acid‐Based Polymethacrylates as Viscosity Index Improvers

Metal-containing nanomaterials as lubricant additives: State-of-the-art and future development

The Lubricity Analysis of Cutting Fluid Emulsions

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