%0 Journal Article 
%A Pamies Porras, Ramón Francisco
%A Arias Pardilla, Joaquín
%A Espinosa Rodríguez, Tulia
%A Carrión Vilches, Francisco José
%A Bermúdez Olivares, María Dolores
%A Sanes Molina, José
%A Avilés González, María Dolores
%T Antiwear performance of ionic liquid+graphene dispersions with anomalous viscosity-temperature behavior
%D 2018
%@ 0301-679X
%U http://hdl.handle.net/10317/6804
%X New dispersions of few-layers graphene (G) in 1-ethyl-3-methylimidazolium ([EMIM]) ionic liquids (ILs) with dicyanamide ([DCA]) or bis(trifluoromethylsulfonyl)imide ([TFSI]) anions have been obtained by mechanical mixing and sonication. IL+0.5 wt% G dispersions show constant viscosity values from 357K (for IL = [EMIM][DCA]) or from 385K (for IL = [EMIM][TFSI]) to 393K. IL + G dispersions with G > 0.5 wt% show linear viscosity increases with increasing temperature, from 306K (for [EMIM][DCA]+1 wt%G) and from 330K to 393K (for [EMIM][TFSI]+0.75 wt%G and [EMIM][TFSI]+1 wt%G). Addition of graphene improves the poor wear reducing performance of [EMIM][DCA], and prevents surface damage on steel when added to [EMIM][TFSI]. Graphene increases the load-carrying ability of ILs, forms a surface layer on the sliding path and retains wear debris, preventing the formation of large abrasive particles.
%K Ciencia de los Materiales e Ingeniería Metalúrgica
%K Ionic liquids
%K Graphene
%K Viscosity
%K Lubrication
%K 3312 Tecnología de Materiales
%~ GOEDOC, SUB GOETTINGEN