Influence of structural variations on imidazolium‐based ionic liquids

Abstract

In this work, a fundamental study of ionic liquids (ILs) is shown. The main goal was to establish relationships between rheological and tribological properties of ILs and to understand how these properties are linked to the molecular structure of ILs. Of particular interest were the effects occurring to a frictional system due to variations of the anions and the alkyl chain length of the imidazolium-based cations. Tribological experiments were performed using a reciprocating ball-on-disc test machine. To understand the effects resulting from a variation of the structural characteristics of the used ILs on the rheological properties, studies were performed using a rheometer. The results obtained are very promising in terms of improving friction and wear behaviour by using ILs as lubricants

Nanolubrication by ionic liquids: molecular dynamics simulations reveal an anomalous effective rheology

“…Although these compounds are subjected to strong Coulombic interactions, they are liquid over a wide range of temperature (from well below 0 °C to hundreds of Celsius degrees) 1,2 . Although these compounds are subjected to strong Coulombic interactions, they are liquid over a wide range of temperature (from well below 0 °C to hundreds of Celsius degrees) 1,2 .…”

Frictional behaviour of imidazolium sulfate ionic liquid additives under mixed slide‐to‐roll conditions: Part 1 — Variation of mixtures with identical weight ratio of ionic liquid additive

“…Most of the work relating to ionic liquids as a lubricant fluid was dedicated to the problem of the lubrication of steel/steel contact surfaces, as well as to the lubrication of other types of contact surfaces . In these studies, the ionic liquids were used as neat lubricants or as additives to conventional oils . The most commonly used ionic liquids in tribological research were those containing an imidazolium cation and a PF 6 or BF 4 anion .…”

Investigation of ionic liquids with and without graphene as lubricant additive for metal/metal and metal/PEEK contacts over a wide temperature range

“…ILs have been a growing field of tribological research for many years. Studies on ILs focus on their practicability as neat lubricant and as additive in base oils 34‐39 . For a turbine oil, Kronberger et al identified a promising IL as additive to improve the tribological properties 40 .…”