“Green Meets Green” – Sustainable solutions of imidazolium and phosphonium ionic liquids with poly(ethylene glycol): Solubility and phase behavior

Theoretical Aspects of Ionic Liquids for Soft‐Matter Sciences

“…In terms of the volume fraction of PEOs, the critical point shifts slightly from the midpoint; however, the shift is nominal and is unlikely to account for the unconventional phase behavior, and hence the mechanism of the observed phase behavior remains unclear. A similar conclusion concerning the mixture of PEO [59] Thus, there can be a substantial gap between the theories of common polymer solutions and polymers dissolved in ionic liquids.…”

Excess molar volumes and viscosity behaviour of binary mixtures of aniline/or N,N-dimethylaniline with imidazolium ionic liquids having triflate or bistriflamide anion

“…All the chemicals were kept in dark bottles in an inert atmosphere and degassed by an ultrasonic bath before sample preparation. Ionic liquids were already purified of volatile solvents and dried using the usual vacuuming procedure applied in our earlier studies [24][25][26][27]. In order to check the purity of the pure components, their experimental values of densities ρ and viscosities η were compared with the respective literature values at several temperatures (Table 2).…”

“…Thus, following the aforementioned attractiveness and importance of ionic liquids and their mixtures, we have carried out studies that include phase behaviour of ionic liquid mixtures [24][25][26] or their thermophysical properties [27]. In this work, as a continuation of these efforts, From these experimental results, excess molar volumes V E , deviations in viscosity ∆η and excess molar Gibbs energies of activation of viscous flow∆G *E were calculated and correlated by the Redlich-Kister equation [28].…”

Solutions of ionic liquids with diverse aliphatic and aromatic solutes – Phase behavior and potentials for applications: A review article

“…This review is mainly related to our phase equilibria (Calado et al, 2013a,b,c;Trindade et al, 2010) and volumetric studies (Vuksanovic et al, 2013) covering the solutions of imidazolium and phosphonium ionic liquids, mainly having bistriflamide ([NTf 2 ] À ) or triflate ([OTf] À ) anions, with several aliphatic and aromatic solutes: (i) diols and triols: 1,2-propanediol, 1,3-propanediol and glycerol (Trindade et al, 2010); (ii) non-polar aromatic compounds (benzene, toluene, p-xylene) (Calado et al, 2013a); (iii) polymer poly(ethylene glycol) (PEG): average molecular mass 200, 400 and 2050 -PEG200 (liquid), PEG400 (liquid) and PEG2050 (solid), respectively (Calado et al, 2013b;Vuksanovic et al, 2013) and (iv) polar aromatic compounds: toxic nicotine and aniline (Calado et al, 2013a) but as well high-value compounds -phenolic acids (vanillic, ferulic and caffeic acid), thymol and caffeine (Calado et al, 2013c). These target molecules have different hydrogen bond acidities and basicities as well as dipole moments.…”

“…U PEG represents segment fractions of PEG in the solutions, calculated using the equation rX 1 /(rX 1 + X 2 ). In this equation r, X 1 and X 2 represent the ratio of average molecular masses of the components(Calado et al, 2013b), mole fraction of PEG2050 and mole fraction of ionic liquid, respectively. Two-phase regions are placed inside the respective envelopes.…”