Synthetic base fluids

Brown, Mary Jane; Fotheringham, J.D.; Hoyes, T. J.; Mortier, Roy M.; Orszulik, Stefan T.; Randles, S. J.; Stroud, P. M.

doi:10.1007/978-94-017-1021-3_2

Cited by 9 publications

(3 citation statements)

References 28 publications

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“…Interest in the tribological properties of mucilage is partly initiated from recent social demands of development and/or fabrication of ecofriendly lubricants. 13,14 More importantly, the lubrication mechanism of mucilage is very unique and different from conventional lubricants in many senses; while the viscosities of mucilage 15,16 are similar to conventional lubricant base stock, 17 boundary lubricating performance of mucilage is exceptionally effective between two moving surfaces. [9][10][11][12] It was observed that lubricating efficacy appears to be closely related to their wetting properties on the tribopair surfaces.…”

Section: Introductionmentioning

confidence: 99%

Slippery when sticky: Lubricating properties of thin films of Taxus baccata aril mucilage

et al. 2016

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Mucilage is hydrogel produced from succulent plants and microorganisms displaying unique adhesiveness and slipperiness simultaneously. The objective of this study is to establish an understanding on the lubricating mechanisms of the mucilage from Taxus baccata aril as thin, viscous lubricant films. Oscillation and flow rheological studies revealed that T. baccata mucilage is shear-thinning, thixotropic, and weak hydrogel that is highly stretchable under shear stress due to its high density physical crosslinking characteristics. In addition, T. baccata mucilage showed a distinct Weissenberg effect, i.e., increasing normal force with increasing shear rate, and thus it contributes to deplete the lubricant from tribological interfaces. Lubrication studies with a number of tribopairs with varying mechanical properties and surface wettability have shown that the lubricity of T. baccata mucilage is most effectively manifested at soft, hydrophilic, and rolling tribological contacts. Based on tenacious spreading on highly wetting surfaces, slip plane can be formed within mucilage hydrogel network even when the lubricating films cannot completely separate the opposing surfaces. Moreover, highly stretchable characteristics of mucilage under high shear enhance smooth shearing of two opposing surfaces as lubricating film.

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Section: Introductionmentioning

confidence: 99%

Slippery when sticky: Lubricating properties of thin films of Taxus baccata aril mucilage

et al. 2016

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“…22 At present, the most widely used synthetic esters in lubrication engineering can be divided into four categories, monoester, diester, polyol ester, and aromatic carboxylic ester according to the number and position of ester groups in synthetic ester molecules. 23 , 24 Compared with vegetable oils, synthetic ester oils have advantages such as good low-temperature and viscosity-temperature performances and excellent friction-reducing and antiwear properties. 25 − 28 Due to these remarkable advantages, they have been widely used in aerospace and automobile industries, food processing, etc.…”

Section: Introductionmentioning

confidence: 99%

Ester Oils Prepared from Fully Renewable Resources and Their Lubricant Base Oil Properties

et al. 2021

ACS Omega

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The work reports on the physicochemical and tribological properties of gallate ester oils prepared from fully renewable resources, such as gallic acid and fatty acids. The ester structures were identified by proton nuclear magnetic resonance spectroscopy ( 1 H NMR), carbon nuclear magnetic resonance spectroscopy ( 13 C NMR) and high-resolution mass spectra (HRMS) data. The density at 20 °C ( d 20 ), kinematic viscosity (KV), viscosity index (VI), pour point (PP), flash point (FP), thermal and oxidative stabilities, friction-reducing and antiwear properties of gallate ester oils were evaluated. The tribological properties of gallate ester oils as lubricants for steel, copper, and aluminum tribo-pairs can be compared with those of the commercially available lubricating oil tris(2-ethylhexyl) trimellitate (Phe–3C i8 ), but their viscosity-temperature characteristics, thermal and oxidative stabilities are better than those of Phe–3C i8 . More importantly, they have much higher biodegradabilities than Phe–3C i8 . The study of the lubrication mechanism shows that the physical and/or chemical adsorption film formed by gallate ester molecules between friction pairs is the key factor for them to obtain friction-reducing and antiwear properties.

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“…They are characterized by good biodegradability, low volatility, good lubricity, good thermal stability, and low pour points [1]. Ester oils are now used in many applications, including as automotive engine oils, hydraulic fluids, and compressor oils [2]. The antiwear and antifriction characteristics of alkyl octadecceoates increase with an increase in the number of polar linkages in the alkyl octadecenoate backbone.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Sorbitol Palmitate by Organic Catalysis and Its Application for Base Oil Stabilization

Elmehbad¹

2017

J Pet Environ Biotechnol

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Esters are excellent lubricants and high performance industrial fluids, but they are often costly. We prepared the ester sorbitol palmitate via an inexpensive phase-transfer catalysis method as an additive for the retardation of oil oxidation. The effects of the sorbitan palmitate content on the lubricant properties and oxidation stability of a base oil were determined. The addition of sorbitan palmitate to the oil retarded oxidation and enhanced the pour point depression. A novel method for inhibiting oxidation through the action of micellar cores was suggested. This micellar inhibition offers a new concept for the protection of lubricants against oxidative degradation.

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Synthetic base fluids

Cited by 9 publications

References 28 publications

Slippery when sticky: Lubricating properties of thin films of Taxus baccata aril mucilage

Slippery when sticky: Lubricating properties of thin films of Taxus baccata aril mucilage

Ester Oils Prepared from Fully Renewable Resources and Their Lubricant Base Oil Properties

Preparation of Sorbitol Palmitate by Organic Catalysis and Its Application for Base Oil Stabilization

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