Macroscopic Friction Studies of Alkylglucopyranosides as Additives for Water-Based Lubricants

Abstract

Water-based lubricants might become an interesting alternative to conventional oil-based lubricants and help to reduce wear as well as improve the energy efficiency of transport processes. Since pure water is generally a rather poor lubricant due to its low viscosity and corrosiveness, it must be tribologically optimized with suitable additives. Here, we study the friction behavior of alkyl glucopyranosides (AGPs) with varying lengths of the alkyl chain. Sliding experiments show that a significant reduction in the coefficient of friction compared to that of pure water is observed. The extent of friction reduction depends strongly on the concentration and on the shearing conditions. It is assumed that the low coefficients of friction are due to the ability of AGPs to form liquid crystalline phases with an ordered structure in the friction gap. Furthermore, the interaction of the AGPs with the surface forms a wear protection layer (boundary lubrication). The friction properties of the water-based system are compared to those of a conventional, mineral oil-based lubricant.

Eco-Friendly Water-Based Nanolubricants for Industrial-Scale Hot Steel Rolling

“…Nevertheless, its corrosive properties and poor viscosity restrain it from being used in most engineering applications. In order to improve the lubrication performance of water, recent research has been devoted to using various nanomaterials as nanoadditives dispersed in water [11][12][13][14][15][16]. These nanoadditives contribute to enhancing friction-reduction, anti-wear and load-carrying capacities of base water to a large extent, which shows great potential to be applied in hot steel rolling.…”

A review on potentials and challenges of nanolubricants as promising lubricants for electric vehicles

“…126 Although efforts were made to decrease NPs high activity on the surface and avoid aggregation, problems, such as avoiding water evaporation, which changes the lubricant's concentration, are still to be solved. 132…”

A Comprehensive Review of Water-Based Nanolubricants

“…In the tribological studies related to water-based lubricants, some researchers used other tribometers including ring-on-plate [222], ball-on-block, pin-on-cylinder [148,149], and 2-ball-plate tribometers [126] according to the testing parameters. In recent years, Ye et al used ball-on-block tribometer to evaluate the tribological properties of multi-walled carbon nanotubes [129], stearic acid [96], and urea-modified fluorinated graphene [134] as water-based nanoadditives by analysing their anti-wear and friction-reduction properties.…”