Investigation of Mixture of Vegetable Oil and Synthetic Esters as Environmentally Friendly Base Stock for Low-temperature Lubrication Applications

Kreivaitis, Raimondas; Gumbytė, Milda

doi:10.24874/ti.2018.40.03.06

Cited by 9 publications

(3 citation statements)

References 12 publications

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“…However, with increased test temperature, the viscosity sharply decreased, and the impact of coffee oil on viscosity diminished. The reason for such behaviour is that the viscosity of coffee oil, containing saturated fatty acids, varies with temperature [26][27][28]. Despite the low concentration, the amount of PIL also influences viscosity.…”

Section: Physicochemical Properties Of Investigated Lubricating Samplesmentioning

confidence: 99%

Studying the Tribological Properties of Coffee Oil-Loaded Water-Based Green Lubricant

et al. 2023

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Lubrication is the primary solution to reduce friction and wear. However, conventional lubricants cause pollution when not properly disposed of or due to accidental leaks. Therefore, environmentally friendly lubricating fluids are welcome in any application where they can meet the performance requirements. This study suggests using coffee oil produced from spent coffee grounds to improve the lubricity of water-based lubricating fluid. Bis(2-hydroxyethyl)ammonium oleate protic ionic liquid facilitates the dispersion of coffee oil in water. Kinematic viscosity, wettability, corrosion prevention, and lubricity tests were performed to evaluate the tribological properties provided by these additives. It was observed that a higher amount of coffee oil could be dispersed with the introduction of a higher amount of protic ionic liquid. In this study, ten wt.% of coffee oil was successfully dispersed using one wt.% of protic ionic liquid. Introducing additives increased dispersions’ viscosity, improved wettability, provided protection against corrosion, and reduced wear and friction. It was proposed that polar molecules of protic ionic liquid were responsible for most of the improvement, while coffee oil contributed by increasing viscosity. Further studies could be directed toward determining rational concentration to meet each particular application’s requirements.

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Section: Physicochemical Properties Of Investigated Lubricating Samplesmentioning

confidence: 99%

Studying the Tribological Properties of Coffee Oil-Loaded Water-Based Green Lubricant

et al. 2023

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“…Different vegetable oils, such as canola, rapeseed, and coconut oil, have been studied as alternatives to mineral cutting oil for use in machining processes [30][31][32]. The results of these studies prove that vegetables oils are a viable alternative, as they have interesting natural properties, such as adequate lubrication, high viscosity indices, high flashpoints, and environmentally friendliness.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a Vegetable Oil Performance in a Milling Process by MQL Lubrication

et al. 2022

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In this work, we carried out a comparison between the dry machining of an aluminum block with conventional cutting oil and a block with vegetable oil. The two oils had different flow rates. Using the Taguchi method, it was possible to determine the matrices for optimizing the best parameters for each group of tests. Then, we studied the utility of using vegetable oil as a cutting lubricant. We found that the vegetable oil studied in this work had good properties in terms of reducing cutting temperatures but was less effective than conventional cutting oil in reducing the surface roughness of the machined part. Tribological tests were carried out to understand the influence of the selected lubricants in reducing friction and wear. After the sliding experiments, which were performed without lubrication in the presence of the same lubricants that were used in the machining tests and in the presence of distilled water, we concluded that vegetable oil has satisfactory lubricating properties that are similar to those of the conventional cutting fluid, indicating a potential for consideration as an effective alternative to the conventional cutting fluid, with economic, environmental, and health advantages.

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“…Environmentally friendly green lubricants were considered to be the main topic for many projects. Bio-based base oils, as well as additives, are widely investigated (Nagendramma and Kaul, 2012; Kreivaitis and Gumbytė, 2018; Woma et al , 2019; Shahabuddin et al , 2020). Water-based lubricants are considered to be environmentally friendly because of nontoxicity and renewability.…”

Section: Introductionmentioning

confidence: 99%

Investigation of tribological properties of environmentally friendly ionic liquids as a potential lubricity improving additives for water-based lubricants

Kreivaitis

Gumbytė

Treinytė

2022

ILT

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Purpose This paper aims to investigate the tribological properties of two protic ionic liquids used as lubricity-improving additives in the water. Their concentration was optimized for different metal friction pairs including bearing steel, stainless steel and aluminum alloy. Design/methodology/approach In this study tribological properties were investigated by using a ball-on-plate reciprocating tribometer. Three different friction pairs were selected: bearing steel-bearing steel; bearing steel-stainless steel; bearing steel-aluminum alloy. To optimize the concentration of investigated protic ionic liquids four concentrations were selected. Wettability was investigated using the droplet method. The corrosiveness of additive-loaded water was investigated using the iron chip method. Findings The results show that by using protic ionic liquids the lubricity of water could be greatly improved. However, the friction pair material and additive concentration play a significant role. The positive tribological effect was attributed to the polarity of the additive molecule which tends to form an adsorption layer. The polarity of molecules also leads to better surface wettability. It was also found that both investigated protic ionic liquids can improve the anticorrosion properties of water. Originality/value To the best of the authors’ knowledge, this is the first study to present a complex investigation of tribological properties of two protic ionic liquids as additives in the water. In this case, three different metal friction pairs and four additive concentrations were investigated. The results could be interesting to those who are working in the field of water-based lubricants and luck for multipurpose lubricity-improving additives.

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Investigation of Mixture of Vegetable Oil and Synthetic Esters as Environmentally Friendly Base Stock for Low-temperature Lubrication Applications

Cited by 9 publications

References 12 publications

Studying the Tribological Properties of Coffee Oil-Loaded Water-Based Green Lubricant

Studying the Tribological Properties of Coffee Oil-Loaded Water-Based Green Lubricant

Analysis of a Vegetable Oil Performance in a Milling Process by MQL Lubrication

Investigation of tribological properties of environmentally friendly ionic liquids as a potential lubricity improving additives for water-based lubricants

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