Effect of Some Vitamins of Group B (B1, B6, B12) on Micellar and Viscosity Properties of Anionic, Cationic and Nonionic Surfactants in Aqueous Solutions

The effect of 3 amino acids on the self‐assembly properties of the surface‐active ionic liquid: 1‐tetradecyl‐3‐methyl imidazolium bromide, [C14mim][Br], was studied in neutral and basic aqueous solution. The critical micelle concentrations were determined by different techniques, and the thermodynamic parameters of micellization (ΔG0mic, ΔH0mic, and ΔS0mic) were measured by isothermal titration calorimetry. The critical micelle concentration values decrease in the presence of all the amino acids used in this study. The most substantial effect was observed in the presence of L‐tryptophan at pH 12, due to the electrostatic and π‐π interactions with the imidazolium headgroup of the surfactant. Always entropy‐driven micellization occurred. Both the enthalpy and entropy changes upon association to micelles increased when the pH was enhanced from 7 to 12. 1H NMR measurements demonstrated that among the used amino acids, L‐tryptophan interacts most strongly with the headgroup of the surfactant cation. The knowledge on the surfactant‐amino acid interactions significantly contributes to the deeper understanding of the effect of surfactants on the properties of peptides.

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Effect of amino acid addition on the micelle formation of the surface‐active ionic liquid 1‐tetradecyl‐3‐methylimidazolium bromide in aqueous solution

Rojas

Miskolczy

Biczók

et al. 2018

J of Physical Organic Chem

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Effect of Cosolvents DMSO and Glycerol on the Self-Assembly Behavior of SDBS and CPC: An Experimental and Theoretical Approach

et al. 2018

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The study of the effect of cosolvents on the micellization of ionic surfactants is relevant in different industrial applications. In this article, we studied the effects of binary aqueous mixtures of DMSO and glycerol on the micellization and thermodynamic behavior of sodium dodecyl benzenesulfonate (SDBS) and cetylpyridinium chloride (CPC) in the range of (293.15–308.15) K. The electrical conductivity method was employed to determine the parameters of micellization such as the critical micellar concentration (CMC) and degree of counterion dissociation (α). The temperature dependence of CMC values was used to calculate other thermodynamic parameters of micellization such as the standard free energy of micellization (ΔG m 0), the standard enthalpy of micellization (ΔH m 0), and the standard entropy of micellization (ΔS m 0). Result analysis showed that the CMCs of both surfactants (SDBS and CPC) were directly proportional to the cosolvent concentration. The standard free energy of micellization (ΔG m 0) was negative in all cases, and it increased with increases in the cosolvent concentration, thereby reducing the driving force for micellization. Quantum chemical calculations and molecular dynamic (MD) simulations were essential to understanding the phenomena and provide a well-supported molecular picture of the micellization process. In this work, a combined experimental and molecular modeling study on the effect of cosolvents such as DMSO and glycerol on the self-assembly behavior of SDBS and CPC was performed. It was found that the supramolecular assembly is inhibited by the presence of glycerol and DMSO because hydrophobic regions in the solvent media increased with increasing concentration of the nonaqueous solvents, imparting cosolvency and promoting the decrease in amphiphilic assembly.

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Micellization, surface activities and thermodynamics study of pyridinium-based ionic liquid surfactants in aqueous solution

Gao

Huang

et al. 2019

RSC Adv.

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Effect of Some Vitamins of Group B (B₁, B₆, B₁₂) on Micellar and Viscosity Properties of Anionic, Cationic and Nonionic Surfactants in Aqueous Solutions

Cited by 5 publications

References 26 publications

Effect of amino acid addition on the micelle formation of the surface‐active ionic liquid 1‐tetradecyl‐3‐methylimidazolium bromide in aqueous solution

Effect of amino acid addition on the micelle formation of the surface‐active ionic liquid 1‐tetradecyl‐3‐methylimidazolium bromide in aqueous solution

Effect of Cosolvents DMSO and Glycerol on the Self-Assembly Behavior of SDBS and CPC: An Experimental and Theoretical Approach

Micellization, surface activities and thermodynamics study of pyridinium-based ionic liquid surfactants in aqueous solution

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