Studies on the self-aggregation, interfacial and thermodynamic properties of a surface active imidazolium-based ionic liquid in aqueous solution: Effects of salt and temperature

A detailed assessment on the interaction of sodium alginate with a surface-active ionic liquid and a conventional surfactant: a multitechnique approach

“…As the exact determination of A is difficult (depends on several external conditions, viz., temperature, local micropolarity, additives, etc. ), already stated in our previous literature, 2,3,69 we have approximately used A min instead of A for determination of packing parameters. v and l c were determined using the following formulae defined by Tanford, 70…”

“…2B(d) for C 16 TPB respectively. The ITC profile for pure surfactants shows a sigmoidal pattern and these are fitted with Boltzmann-sigmoidal equation 78 and the values of cmc have been taken 3,79,80 from the inflection of fitted plots intermediated of sigmoidal region (designated by the heavy arrows). Evaluation of the second cmc (cmc 2 ) has been performed for C 16 TPB in aqueous solution by zooming the region in between 0.2-0.5 mM of [C 16 TPB] shown in the inset of Fig.…”

“…Surfactants form a specific type of aggregate in both aqueous and non-aqueous solvents at a threshold concentration, called critical micelle concentration (cmc). [1][2][3] Significant attention has been paid for decades until now [4][5][6][7][8][9][10][11][12][13][14] to the oppositely charged polyelectrolyte with different conventional surfactant systems for their complexation ability and rich aggregation behaviour in aqueous solution by considering emerging applications in cosmetic and paint industries, and also in enhanced oil recovery processes. This complexation ability originates from the coulombic attraction between the oppositely charged polyions and surfactant monomers as well as the hydrophobic attraction among the apolar chain of surfactants, hydrophobic moieties of polyelectrolytes and tails of surfactants.…”

Effect of amino acid on the surface adsorption and micellar properties of surface active ILs varying in cationic head groups

“…This large number of probable ILs then requires the build-up of predictive models to recognize a particular IL for a specific application [ 6 , 7 ]. As a result, a relatively large, systematic, and adequately precise dataset of properties is necessary for known, as well as new, ILs [ 8 , 9 , 10 , 11 , 12 ]. Even though a large amount of data have already been published on the physicochemical properties of ILs, systemic studies are still needed and should be further explored on this subject.…”

“…ILs comprising of longer alkyl chains are analogous to conventional surfactants which form aggregates in an aqueous medium [ 8 , 19 ]. Nitrogen-containing surfactants (i.e., N-heterocycles) including imidazolium, pyrrolidinium, pyridinium, piperidinium, morpholinium, and piperazidinium based ILs, have been investigated by several researchers owing to their unique structures and exceptional surface properties, which makes them different from the traditional ionic surfactants and hence, their aggregation behavior have been investigated in an aqueous medium [ 15 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ].…”