Nanolubrication

Abstract

Lubrication strategies developed long time ago employed amphiphilic molecular lubricant additives to confer to lubricating oils or greases specific properties such as friction reduction, antiwear, anticorrosion. The understanding of their action and the development of various type of nanoparticles are at the origin of new lubrication strategies using composite or functionalized nanoparticles in dispersion in lubricating oils or greases to confer to the lubricants the needed functions. The present work is concerned with the presentation of these new approaches. Some examples will be developed to show the main aspects of the mechanisms of action of these new nano-additives.

Friction Properties of Fluorinated Carbon Nanodiscs and Nanocones

“…Due to these limitations, new strategies have been investigated. They consist in the introduction, in the lubricant base, of nanoparticles of tribo-active phases (MoS 2 , graphite) [11][12][13] or precursors of tribo-active phases (fullerenes, carbon-onions, carbon nanotubes, inorganic fullerenes and nanotubes, …) [14][15][16][17][18][19][20][21][22] subjected to build on the sliding surfaces, in the physical conditions of the sliding interface, the tribofilm without any chemical reactions with the substrates. Additionally, the immediate formation of the tribofilm can be obtained in the case of optimized formulation as far as the tribo-active nanoparticles are expected to instantaneously form the tribologic film in the sliding contact.…”

“…The friction reduction process is classically attributed to the weak interactions between the sheets [11]. Recent works realized on new synthesized carbonaceous nanoparticles (fullerenes, carbon-onions, nanotubes, nanofibres) and inorganic fullerenes and nanotubes (IF-MoS 2 , IF-WS 2 ) gave a lot of informations about the friction reduction processes, involving nanotubes or fullerenes delamination and deposition of graphite layers of some nanometres thickness in the contact area [14][15][16][17][18][19][20][21][22].…”

Carbon Microspheres as Ball Bearings in Aqueous-Based Lubrication

“…1 Today, lubricants play an integral role in the operation of several technologies, including internal combustion engines, vehicles, gear systems, compressors, turbines, and hydraulics in addition to smaller scale technologies, including the lubrication of hard disk drives 2 and microelectromechanical systems (MEMs). 3 The main functions of a lubricant are to reduce friction and material wear.…”

Nanotubes as a modifier pbb and asphalt concrete

“…Analysis of innovative development of construction technologies and materials demonstrates that the materials and technologies based on nanoscale technology will be in use for the next 10-20 years. [1][2]. Nowadays, the application of nanotechnology composites to enhance functional properties of building materials and products -is a promising new direction in science and science-intensive production.…”