Evaluation of the effect of silver nanoparticles on the tribological and thermophysical properties of bio-lubricants

Abstract

In this article, the effect of infusion of silver nanoparticles into the base oil lubricants was investigated. In this study, Jatropha and Pongamia oils were used as base oils and silver nanoparticles infused at 0.25%, 0.5%, and 0.75% weight-percentage of the base oils to create nano-based bio-lubricants. The influence of silver nanoparticles on the Tribological and Thermophysical properties of the base oils was analyzed through various test procedures. The Pin-on-disc tribometer test was done to measure friction and wear at various loads. Pin made of Aluminum metal matrix composite fabricated by stir casting method was used and the results revealed that the inclusion of silver nanoparticles significantly improved the friction and wear properties of the base oils. Pin-worn surface morphology was analyzed using a field emission scanning electron microscope and X-ray diffraction. Thermal conductivity and kinematic viscosity of nano-based bio-lubricants were evaluated as per ASTM standards and the results showed that both the thermal conductivity and kinematic viscosity increased with the infusion of silver nanoparticles.

The influence of various grease compositions and silver nanoparticle additives on electrically induced rolling-element bearing damage

“…Some nanoparticles have proven to reduce the coefficient of friction by 20%-30% [37] and even up to 50% for WS 2 and other nanoparticles [38,39]. Silver (Ag) nanoparticles have shown to reduce friction by 25%-40% [40][41][42][43] and even when added to already fully-formulated lubricants [44]. The preparation of stable dispersions of particles in hydrocarbons has proven to be a difficult task as well [45] because only a few particle stabilizers that dissolve in hydrocarbons are known to be effective at hindering precipitation.…”

Thermal Transport and Physical Characteristics of Silver-Reinforced Biodegradable Nanolubricant

“…AgNs possess a high surface area per mass, leading to cell lysis and causing the antibacterial effect due to the increased release of silver ions [30,31]. They have gained substantial interest due to their mechanical attributes such as ductility and low shear strength [32], environmental friendliness [33,34], chemical stability [35,36], thermal transport [34,37,38], and significant potential to enhance the effectiveness of anti-wear performance and friction reduction [27,[39][40][41].…”