Polyelectrolyte cellulose gel with PEG/water: Toward fully green lubricating grease

Shetty, Pramod; Mu, Liwen; Shi, Yijun

doi:10.1016/j.carbpol.2019.115670

Cited by 25 publications

(9 citation statements)

References 76 publications

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“…Figure 7(a) presents the determination of the LVR for both materials. The behavior of the two greases is characteristic of viscoelastic materials with base oil and micro- and nanoscale additives (Shetty et al , 2019; Martín-Alfonso et al , 2020). For both greases, it is observed that the behavior of G ′ and G ″ at low deformation amplitude is linear until a critical deformation is reached.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the addition of a solid lubricant to the formulation did not affect the shear flow properties because the behavior was closed to that of the commercial grease. The viscosity of both greases [Figure 6(b)] decreased as the shear rate increased, revealing a shear thinning (pseudoplastic) behavior of gel-like lubricants (Shetty et al , 2019; Mohamed et al , 2020; Shetty et al , 2020).…”

Section: Resultsmentioning

confidence: 99%

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Laboratory evaluation of a nanostructured lubricating grease for tram runflat tires

Pérez Giraldo,

Vasquez,

Toro

et al. 2024

ILT

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Purpose This paper aims to develop a stable gel-type lubricant emulating commercial conditions. This encompassed rheological and tribological assessments, alongside field trials on the Medellín tram system. Design/methodology/approach The gel-type lubricant with graphite and aluminum powder is synthesized. Rheological tests, viscosity measurements and linear viscoelastic regime assessments are conducted. Subsequently, tribological analyses encompassing four-ball and twin disc methods are executed. Finally, real-world testing is performed on the Medellín tram system. Findings An achieved lubricant met the stipulated criteria, yielding innovative insights into the interaction of graphite and aluminum powder additives under varying tests. Originality/value Novel findings are unveiled regarding the interaction of graphite and aluminum powder additives in tribological, rheological and real-world trials. In addition, the wear behavior of polymers is observed, along with the potential utilization of such additives in tramway systems.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Laboratory evaluation of a nanostructured lubricating grease for tram runflat tires

Pérez Giraldo,

Vasquez,

Toro

et al. 2024

ILT

View full text Add to dashboard Cite

show abstract

“…Of course, various types of additives in the lubricating system have distinct interaction forces on the interfacial behavior, such as the van der Waals force, physical and/or chemical adsorption, coordination, or hydrogen bonding. − Among them, the common materials mainly include nanomaterials, − hybrid materials, , gel, functional modification materials, , covalent/metal–organic framework materials, , ionic liquids (ILs) , , deep eutectic solvent, etc. Based on highly designable molecular structures and tunable properties characteristic, highly polar ILs are superior in competitive adsorption for polyethylene glycol base systems, laying the foundation for the lubricating system with high-performance, multifunctional properties, and service stability .…”

Section: Introductionmentioning

confidence: 99%

Fortified Lubricating Response to Sustainable PEG System from Protic Ionic Liquid and Their Strong Hydrogen Bonding Network

Xu,

Tian,

Cui

et al. 2024

ACS Sustainable Chem. Eng.

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As a hydrophilic polyether molecule, polyethylene glycol has environmentally friendly, degradable, and compatibility characteristics, gradually becoming a potential choice for green lubrication. Two novel multifunctional protic ionic liquids (ILs) were synthesized, and an ILs-PEG200 lubrication system was constructed with a strong hydrogen bonding network structure. The determination of rheological properties and boundary lubrication states inspired us to consider the interaction between polar additives and systems. Surprisingly, an extremely stable run-in period was obtained by the high efficiency adsorption contributed from high-polarity ILs at the sliding interface in the initial shear stage. Meanwhile, the ILs-PEG200 lubrication system also has superior load carrying and antishear properties, as well as remarkable lubrication stability even under very high loads, showing certain potential for engineering applications. In addition, the lubrication mechanism was obtained by exploring the interaction among ILs, PEG system, and metal surface, and the results revealed that tribo-oxidation reactions, physical/chemical adsorption, and tribochemical reactions occurred on the metal asperity during shear. Therefore, a tribofilm containing metal phosphates and sulfides is generated through the occurrence of tribochemical reaction and the synergistic effect of the base system, metal interface, and functional additives. The protic ILs lubrication additives in this work can significantly enhance the tribological performance of poly(ethylene glycol) systems under harsh conditions, providing a theoretical basis for its development in the engineering field.

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“…In recent years, with the rapid increase in the global high-end equipment manufacturing capacity and the whole society attaching high attention to environmental protection issues, people have higher requirements for the high efficiency, degradability, harmless, and other operational performance for lubricating oil [1][2][3]. The traditional petroleum-based mineral oil has weakened cost advantages and limited biodegradation and service performance, causing it to face the pressure of resources and environmental protection [4][5][6][7][8][9]. Therefore, there is an urgent need for an alternative environmentally friendly and low-polluting lubricant.…”

Section: Introductionmentioning

confidence: 99%

Insight into Hydrolytic Stability and Tribological Properties of B-N Coordination Tung Oil-Based Lubricant Additive in Water

Yao¹,

Ding²,

Li³

et al. 2023

Journal of Renewable Materials

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A tung oil-based boron-nitrogen coordination polymer (TWE-BN) was specially designed and synthesized as a highly efficient water-based lubricant additive, which has been beneficial to both energy conservation and conducive to environmental protection. Its hydrolysis stability and tribological properties in water were investigated. To better research the lubricating properties, and thus to understand the interaction between the surface and the lubricating additives. Herein, both experimental and theoretical computations based on density functional theory (DFT) were performed. The addition of TWE-BN reduces the water friction coefficient and wear scar diameter, and the maximum non-seizure load increased from 93 to 726 N. Moreover, the anti-corrosion ability on copper was classified as 1b level. The stainless-steel surface was analyzed using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). In hydrolytic stability testing, TWE-BN was better than nitrogen-free tung oil-based lubricant additive (TWE-B) and remained non-hydrolyzed for at least 15 days, implying the feasibility of tung oil-based boron-nitrogen coordination as highly effective and hydrolytic stability lubricant additives.

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Polyelectrolyte cellulose gel with PEG/water: Toward fully green lubricating grease

Cited by 25 publications

References 76 publications

Laboratory evaluation of a nanostructured lubricating grease for tram runflat tires

Laboratory evaluation of a nanostructured lubricating grease for tram runflat tires

Fortified Lubricating Response to Sustainable PEG System from Protic Ionic Liquid and Their Strong Hydrogen Bonding Network

Insight into Hydrolytic Stability and Tribological Properties of B-N Coordination Tung Oil-Based Lubricant Additive in Water

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