Surface active and aggregation behavior of methylimidazolium-based ionic liquids of type [C n mim] [X], n = 4, 6, 8 and [X] = Cl−, Br−, and I− in water

Water-soluble complexes of hydrophobically modified polymer and surface active imidazolium-based ionic liquids for enhancing oil recovery

“…The photographs in Fig. 3(a-g) The air/water critical micelle concentration (cmc) values of C 6 mimBr and C 8 mimBr were measured and compared with the values reported in the literatures at 303.15 K. The obtained cmc values of 465 mM for C 6 mimBr and 118 mM for C 8 mimBr are in agreement with the reported values 470 and 121 mM, respectively [32,33]. Therefore the ILs concentrations were fixed at their cmcs in pure water to investigate the effect of ILs on complexes viscosity in the concentration of copolymer from 1 to 5 g/L.…”

Catanionic surfactant formation from the interaction of the cationic surfactant hexadecyltrimethylammonium bromide (CTAB) and the ionic liquid 1-butyl-3-methylimidazolium octyl sulfate (bmim-octyl SO4) in aqueous solution

“…In the case of the cationic surfactant hexadecyltrimethylammonium bromide (CTAB) the effect of ILs on the surfactant cmc confirms the trend above described [8][9][10][11][12][13]. However, when IL posses surface activity as reported for long alkyl chain ionic liquids [14][15][16][17][18][19][20][21] and some short alkyl chain ILs [22,23] the ionic liquid / surfactant mixture behaves as a typical binary surfactant system [24][25][26]. In these binary systems the mixed micelle composition X 1 M as well as the  M interaction parameter quantifying the synergism can be obtained by applying the equations of the Regular Solution Theory [27].…”

Surface adsorption and micelle formation of imidazolium-based zwitterionic surface active ionic liquids in aqueous solution

“…Numerous SAILs based on imidazolium, pyridinium, pyrrolidinium cations with different hydrocarbon chain lengths were studied extensively using a variety of methods, such as surface tension, 1 HNMR, steady-state fluorescence spectroscopy, and conductivity measurements [10][11][12][13][14]. Additionally, the effects of anionic nature (e.g., Cl À , Br À , NO À 3 , I À , BF À 4 , CF 3 SO À 3 , CH 3 COO À , ClO À 4 ) [15][16][17][18], various organic additives [19], and salts [20] on the aggregation behavior of SAILs in aqueous solutions were investigated. All the above studies indicate that we can control the aggregation behavior of SAILs in aqueous solutions by altering the alkyl chain length, cationic ring structure, and anionic type, as well as organic additives and salts.…”