TY - JOUR 
A1 - Pamies Porras, Ramón Francisco
AU - Arias Pardilla, Joaquín
AU - Espinosa Rodríguez, Tulia
AU - Carrión Vilches, Francisco José
AU - Bermúdez Olivares, María Dolores
AU - Sanes Molina, José
AU - Avilés González, María Dolores
T1 - Antiwear performance of ionic liquid+graphene dispersions with anomalous viscosity-temperature behavior
Y1 - 2018
SN - 0301-679X
UR - http://hdl.handle.net/10317/6804
AB - 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.
KW - Ciencia de los Materiales e Ingeniería Metalúrgica
KW - Ionic liquids
KW - Graphene
KW - Viscosity
KW - Lubrication
KW - 3312 Tecnología de Materiales
LA - eng
ER -