Publikacje

Abstract:

The aim of this article is to experimentally determine the role of the environment, consisting
of a base oil (PAO), carbon nanomaterials, and optional other additives, as well as the kind of metal in
contact with the lubrication film, in the stimulation of zinc dialkyldithiophosphate (ZDDP) additives’
effectiveness during protective film formation. This paper focuses on the role of carbon nanostructures
in energy transportation and conversion during tribological processes. An antistatic additive (ASA)
(not used in lubricating oils) for jet fuels was added to disturb the process of energy conduction
(electric charges) through the lubricant film and thus determine how this disturbance affects the
kinetics of the ZDDP triboreaction and, consequently, the linear wear. To achieve this research goal,
two types of tribological testing devices were used: an Anton Paar tribometer (TRB) and a triboelectric
tribometer (TET). The novelty of the present research is in the use of the method for disturbing the
flow of charge/energy through the lubricant film with an antistatic additive for jet fuels, ASA, to
influence the impact of this energy on the antiwear properties of ZDDP. The following conclusions
were drawn: (1) carbon-based nanostructures, i.e., CNTs, AuCNTs, graphene, and fullerenes, are able
to change the rate of chemical reactions of ZDDP during tribological processes; (2) CNTs have the
ability to catalyze tribochemical reactions of ZDDP, while graphene and fullerenes are not able to
perform this effectively; (3) AuCNT takes the role of an inhibitor during ZDDP’s triboreaction; and
(4) by discharging electric charge/energy, ASA, in cooperation with CNT and AuCNT significantly
reduces the rate of the ZDDP reaction.

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Carbon-Based Functional Nanomaterials as Tools for Controlling the Kinetics of Tribochemical Reactions