Abstract
Lubricants modified with nanosized particles are of great interest to science and industry, since they have much better tribological characteristics compared to traditional lubricants. One of the most promising nanoparticles is graphene, which has an extremely low coefficient of friction, is very wear-resistant and environmentally friendly. Today, the main problem for the development of a new nano-lubricant is the creation of an environmentally friendly and cheap technology for the industrial production of graphene suspensions or graphene concentrates for the modification of traditional lubricants. The article describes the process of liquid-phase shear exfoliation of graphite in a rotary apparatus with moving blades, in synthetic oils. The kinetic dependences of the exfoliation process, i.e. the dependence of the concentration of graphene nanostructures in suspension over time at different values of the process parameters. It has been experimentally proved that using a stator-rotor mixer with moving blades, it is possible to obtain graphene nanostructure concentrations of at least 2 mg / ml.
Highlights
Graphite has been used as an antifriction material for several centuries, but the production of graphene and graphene nanostructures has greatly increased the interest of scientists and engineers in this material [1, 2]
It has been experimentally established that the addition of graphene nanostructures to lubricants reduces the coefficient friction and wear, and at times increases the ultimate load on friction pairs
An analysis of the use of nanomaterials to improve the operational characteristics of lubricants showed that one of the most promising is liquid-phase shear exfoliation of graphite
Summary
Graphite has been used as an antifriction material for several centuries, but the production of graphene and graphene nanostructures (low-layer graphene and multilayer graphene) has greatly increased the interest of scientists and engineers in this material [1, 2]. It has been experimentally established that the addition of graphene nanostructures to lubricants reduces the coefficient friction and wear, and at times increases the ultimate load on friction pairs.
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