A multi-faceted review on industrial grade nanolubricants: Applications and rheological insights with global market forecast

Abstract

The formulation of colloidal suspension with nano-dispersants in different engine and gear oils is gaining momentum owing to its vast industrial applicability. Throughout the machine's service life, the time-weighted average viscosity of the lubricant has the biggest impact on energy usage. The best option, in terms of energy consumption, is frequently in the middle. Recent investigations have confirmed the anomalous rheological behavior of nanolubricants. This article introduces the current advancements and implementation of nanoparticles as additives, reviews and presents a comprehensive study on the available rheological studies. Classical models and developed correlations for estimating the viscosity of industrial engine and gear oils have been precisely summarized. A detailed analysis on the influential elements such solid particle concentration and temperature on viscosity is also performed. Various nano-lubrication mechanisms have been discussed to supplement the perspective on the interactions of nanolubricants with solid surface at a microscopic level. This study also focuses on the market growth analysis of industrial lubricants and its probable impact on the environment. Special focus on cost economics of nanolubricants has been put for efficient energy savings. Also, efforts have been made to explore the possibilities in nanolubricant business in post pandemic world.

Keywords

• Nanolubricants
• Engine oils
• Gear oils
• Viscosity