resumo
Density and viscosity experimental data for binary mixtures of 1-alkyl-3-methylimidazolium alkylsulfates + water are reported using four ionic liquids: 1-butyl-3-methylimidazolium hydrogensulfate [C(4)mim][HSO4], 1-butyl-3-methylimidazolium methylsulfate [C(4)mim] [C1SO4], 1-ethyl-3-methylimidazolium methylsulfate [C(2)mim] [C1SO4], and 1-ethyl-3-methylimidazolium methylsulfate [C(2)mim][C2SO4]. The choice of the ionic liquids allows us to compare the effects of incrementing the alkyl chain length in the cation and the anion on the measured thermophysical properties behavior. The Gardas and Coutinho group contribution methods were applied to the description of the pure component densities and viscosities allowing the estimation of new group contribution parameters, to extend the applicability of these methods to new ILs. Excess molar volumes and viscosity deviations were calculated and correlated by Redlich-Kister polynomial expansions. .
palavras-chave
1-ETHYL-3-METHYLIMIDAZOLIUM ETHYL SULFATE; TEMPERATURE IONIC LIQUIDS; EXCESS MOLAR VOLUMES; THERMOPHYSICAL PROPERTIES; PHYSICAL-PROPERTIES; SURFACE-PROPERTIES; 313.15 K; ETHYLSULFATE; CATALYSIS; TRANSPORT
categoria
Thermodynamics; Chemistry; Engineering
autores
Bhattacharjee, A; Varanda, C; Freire, MG; Matted, S; Santos, LMNBF; Marrucho, IM; Coutinho, JAP
nossos autores
Arijit Bhattacharjee
Bolseiro de pós-Doutoramento
Mara Guadalupe Freire Martins
Investigador CoordenadorGrupos
G4 - Materiais Renováveis e Economia Circular
G5 - Materiais Biomiméticos, Biológicos e Vivos
agradecimentos
Financial support was provided by Fundacao para a Ciencia e Tecnologia (FCT) through Project PTDC/QUI/72903/2006. A.B. acknowledges FCT support through a postdoctoral fellowship (SFRH/BPD/77858/2011) and I.M.M. for a contract under Programa Ciencia 2007. S.M. thanks CNPq/Brazil (Grant No. PQ305990/2008-0) and Path/U. Aveiro for their hospitality.