Salt‐Induced Microstructural Transitions in Aqueous Dispersions of Ionic‐Liquids‐Based Surfactants

Abstract

Applicability and performance ability of the surfactants are controlled through their aggregation behavior, which are modulated by employing external additives. In order to achieve favorable shape and sized nano‐aggregates, we have investigated the role of structure making hydrotop; sodium salicylate (NaSal) on the micellar transition of the functionalized and non‐functionalized ionic liquid based surfactants (ILBSs) (1‐hexadecyl‐3‐vinylimidazolium bromide and 1‐hexadecyl‐3‐methylimidazolium bromide) in aqueous medium. The micelle to vesicle transitions in the studied systems is explored using viscosity, dynamic light scattering and transmission electron microscopy measurements. For the first time we report the nano and micro‐structural aggregates of the vinylfunctionalized ILBSs with respect to the composition, and concentration of the additives; alkyl chain length and head group of ILBSs. Transmissions electron microscopy (TEM) revealed the formation of vesicles at high concentration of NaSal (∼1000 mM) for the vinylfunctionalized ILBS.

Ionic Liquid-Based Catanionic Coacervates: Novel Microreactors for Membrane-Free Sequestration of Dyes and Curcumin

“…We can safely assume that the micellar changes occurred in the solution are due to the electrostatic interactions between the cationic micelle and the anionic Sal – , as indicated for the drug-induced micellar transition in the ILBS solution and other catanionic systems. 10,35,36 Region A 1 belongs to the concentration ( C NaSal < 10 mM) where transparent solution with nearly zero turbidity was observed (Figure 2). This indicates the weaker interaction between NaSal and C 8 EMeImBr that forms only smaller-sized aggregates.…”

Temperature‐Responsive Low Molecular Weight Ionic Liquid Based Gelator: An Approach to Fabricate an Anti‐Cancer Drug‐Loaded Hybrid Ionogel

“…Sodium salicylate is a wellknown structure making hydrotope that induces micellar transition in various traditional surfactants as well as ILBSs. [51,52] Tailor made amphiphilic molecules, such as salt free catanionic amphiphiles are designed through judicious selection of the cations and anions that are proved advantageous. It not only involves a simple binary system including the solvent rather than the complex system (in case of additives) but also eliminates the formation of counter ions in the solution.…”

Scrutinizing Self-Assembly, Surface Activity and Aggregation Behavior of Mixtures of Imidazolium Based Ionic Liquids and Surfactants: A Comprehensive Review

“…Other applications of SAILs can be listed as foaming and antifoaming agents, antimicrobials, demulsification of crude oil, chromatographic and electrophoretic separations, enhanced oil recovery (EOR), solubilization of drugs, extraction of natural products etc. (Shah et al, 2018a , 2020 ; Vaid et al, 2018a , b ; Dani et al, 2019 ; Isosaari et al, 2019 ; Kuddushi et al, 2019 , 2020 ; Shakeel et al, 2019 ; Lee et al, 2020 ; Nandwani et al, 2020 ; El Seoud et al, 2021 ). SAILs can be of different kinds based upon their structure.…”