Micellization of alkyltrimethylammonium bromide surfactants in choline chloride:glycerol deep eutectic solvent

Abstract

Deep eutectic solvents have shown the ability to promote the self-assembly of surfactants in solution. However, some differences have been found compared with self-assembly in pure water and other polar organic solvents. The behaviour of alkyltrimethylammonium bromides in choline chloride:glycerol deep eutectic solvent has been studied by means of surface tension, X-ray and neutron reflectivity and small-angle neutron scattering. The surfactants were found to remain surface active and showed comparable critical micelle concentrations to the same surfactants in water. Our scattering studies demonstrate that these surfactants form globular micelles with ellipsoidal shape in solution. The size, shape and aggregation number of the aggregates were found to vary with the chain length of the surfactant. Specific solvent-headgroup interactions were not found in this system, unlike those we have previously postulated for anionic surfactants in choline chloride deep eutectic solvents.

Bayesian determination of the effect of a deep eutectic solvent on the structure of lipid monolayers

“…Therefore, any capillary wave roughness at the air-DES interface is carried equally through the layers. The interfacial roughness was constrained to be greater than 3.3Å in agreement with previous work [10].…”

“…20 mN m −1 upon addition of lipid, it was not possible to reach those values for the monolayers on DES [19]. The surface tension of pure choline chloride:glycerol has been previously reported to be 63.5(5) mN m −1 [10]. This means that a surface pressure of ca.…”

Protein conformation in pure and hydrated deep eutectic solvents

“…4 DES have been demonstrated to promote amphiphile selfassembly of surfactants and phospholipids, both essential for the formation of biological membranes. [5][6][7][8][9] Protein stability has been investigated in various DES, [10][11][12][13] and enzymatic activity has been explored as an alternative to water for enzyme-catalysed reactions. [14][15][16] Bacterial preservation has also been demonstrated in DES.…”

Highly Stable Dispersion of Carbon Nanotubes in Deep Eutectic Solvent for the Preparation of CNT‐Embedded Carbon Xerogels for Supercapacitors

“…In recent years, DES have been demonstrated to be capable of promoting self‐assembly of amphiphile. For example, self‐aggregation of cationic surfactants hexadecyl‐(trimethyl)‐azanium bromide (C n TAB) was observed in choline chloride/glycerol DES . T. Arnold and co‐workers demonstrated that the anionic surfactant sodium dodecyl sulfate (SDS) maintained its surface‐active and showed self‐assembly in choline chloride/urea DES .…”

“…For example, self-aggregation of cationic surfactants hexadecyl-(trimethyl)-azanium bromide (C n TAB) was observed in choline chloride/glycerol DES. [21,22] T. Arnold and co-workers demonstrated that the anionic surfactant sodium dodecyl sulfate (SDS) maintained its surface-active and showed self-assembly in choline chloride/urea DES. [23] These water-free micellization phenomena of surfactants delivered some useful information for the potential application of DES/surfactant in controllable synthesis of functional materials.…”