Influence of nano particles on the performance parameters of lube oil – a review

Abstract

This review focuses on the effect of nanoparticles in lubricating oil performance. The impact of chemical composition, particle size, and nanoparticle shape is evaluated on lubricants’ lubricating capabilities. The effects of base oils and surfactants, and dispensers are also covered. This review demonstrates a comparative study of nanoparticles based on the maximum reduction in friction and wears values and the obtained minimum coefficient of friction (COF). The above three performance parameters collectively provide a better understanding of the role of nanoparticles in lubricating oil performance.

Enhanced Stability, Superior Anti-Corrosive, and Tribological Performance of Al2O3 Water-based Nanofluid Lubricants with Tannic Acid and Carboxymethyl Cellulose over SDBS as Surfactant

“…Their diminutive size might lead to insufficient film formation, limiting their ability to withstand heavy loads and prevent metal-to-metal contact. This statement is supported by the literature review, which indicates that nanoparticles with a size of 300 nm exhibit a coefficient of friction (CoF) value lower than 0.1, similar to that of smaller nanoparticles 29 . Moreover, smaller nanoparticles are relatively more expensive, as producing small particles is more time-consuming compared to larger ones.…”

Properties and tribological evaluation of graphene and fullerene nanoparticles as additives in oil lubrication

“…This is also known as nano polishing effect. 33 In terms of severity of wear, it was observed that adding graphene in test oil had significant effect in lowering wear scar area compared to other test oils. However, FO showed only 5% improvement in wear scar area compared to 0W20.…”

“…Nanoparticles function as microscopic rollers between the tribo surfaces, converting sliding motion into rolling effects that reduce the COF value. 33 Nanoparticles in lubricants have mainly rolling effect, protective barrier effect mending effect, and polishing effect. 8 Microscopic observations indicate that GO has polishing effect on the steel blocks.…”

“…The shape and structure of additives affect the functionality of lubricant. 29 Fullerene nanoparticles function as tiny balls between the tribo surfaces, turning sliding action into rolling results that lower the COF value. 30 While graphene is a one-atom thick, two-dimensional, graphite-based substance with exceptional tensile and thermal properties.…”

High-Temperature Superlubricity Realized with Chlorinated-Phenyl and Methyl-Terminated Silicone Oil and Hydrogen-Ion Running-in

“…Advanced ceramic materials, such as Si 3 N 4 , Al 2 O 3 , B 4 C, and SiC, are widely used in aerospace-related equipment because of their excellent mechanical reliability, fracture toughness, thermal shock resistance, and wear resistance. − Silicone oil represents a large class of synthetic polymers with excellent properties, such as extremely low volatility, nonflammability, high thermal stability, oxidative stability, low melting point, and extremely low vapor pressure. , It has an extremely wide range of applications in aerospace machinery , and electronic equipment components, , particularly in the lubrication of space-bearing mechanisms. , However, conventional methyl silicone oil exhibits poor lubricating performance, particularly in the lubrication of steel/steel and ceramic/ceramic point contacts. , In numerous studies, the molecular structure of methyl silicone oil has been modified to synthesize methyl-terminated organopolysiloxane with pentachlorophenyl-substituted groups on the pendant [chlorinated-phenyl and methyl-terminated silicone oil (CPSO)]. This modification not only improves the lubricating performance of silicone oil but also maintains its excellent temperature resistance and low volatility. − …”