Thin-Film Rheology and Tribology of Imidazolium Ionic Liquids.

ABSTRACT: Ionic liquids (ILs) are organic molten salts with low-temperature melting points that hold promise as next-generation environmentally friendly boundary lubricants. This work examines the relationship between tribological and rheological behavior of thin films of five imidazolium ILs using a surface force apparatus to elucidate lubrication mechanisms. When confined to films of a few nanometers, the rheological properties change drastically as a function of the number of confined ion layers; not only the viscosity increases by several orders of magnitude but ILs can also undergo a transition from Newtonian to viscoelastic fluid and to an elastic solid. This behavior can be justified by the confinement-induced formation of supramolecular clusters with long relaxation times. The quantized fric

SUBMITTER: Zhang X 

PROVIDER: S-EPMC10540134 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature