scholarly journals Mixed Micelle Formation and Co-adsorption of Anionic/Non-ionic Surfactant Mixtures on Rutile

1996 ◽  
Vol 13 (5) ◽  
pp. 377-395 ◽  
Author(s):  
Ajay K. Vanjara ◽  
Sharad G. Dixit
Keyword(s):  
Mixed Micelle ◽  
Co Adsorption ◽  
Micelle Formation ◽  
Ionic Surfactant ◽  
Surfactant Mixtures ◽  
Mixed Micellization ◽  
Mixed Micelle Formation ◽  
Brij 58 ◽  
Solid Liquid Interface ◽  
Solid Liquid

Mixed micelle formation between the anionic surfactant p-dodecyl benzene sulphonate and the non-ionic surfactants Brij-58, Brij-78 and Brij-99, having the same number of oxyethylene units but a varying number of hydrophobic groups, has been studied using surface tension and NMR spectroscopic measurements. Both hydrophobic–hydrophobic and hydrophilic–hydrophilic interactions play an important role in mixed micelle formation leading to greater non-ideality. The effect of mixed micelle interactions on the adsorption of these surfactants from their mixtures on rutile have been investigated using adsorption and zeta potential measurements. Adsorption above the CMC level is dictated by the relatively higher tendency of mixed micellization over mixed aggregation at the solid/liquid interface.

scholarly journals Thermodynamic and Interfacial Properties of DTABr/CTABr Mixed Surfactant Systems in Ethanolamine/Water Mixtures: A Conductometry Study

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Olaseni Segun Esan ◽  
Medinat Olubunmi Osundiya ◽  
Christopher Olumuyiwa Aboluwoye ◽  
Owoyomi Olanrewaju ◽  
Jide Ige
Keyword(s):  
Mixed Micelle ◽  
Mixed Solvent ◽  
Pure Water ◽  
Micelle Formation ◽  
Theoretical Models ◽  
Solvent System ◽  
Synergistic Interaction ◽  
Surfactant Mixtures ◽  
Mixed Micelle Formation ◽  
Free Energy Of Micellization

Mixed-micelle formation in the binary mixtures of dodecyltrimethylammonium bromide (DTABr) and cetyltrimethylammonium bromide (CTABr) surfactants in water-ethanolamine mixed solvent systems has been studied by conductometric method in the temperature range of 298.1 to 313.1 K at 5 K intervals. It was observed that the presence of ethanolamine forced the formation of mixed micelle to lower total surfactant concentration than in water only. The synergistic interaction was quantitatively investigated using the theoretical models of Clint and Rubingh. The interaction parameter β12 was negative at all the mole fractions of DTABr in the surfactant mixtures indicating a strong synergistic interaction, with the presence of ethanolamine in the solvent system resulting in a more enhanced synergism in micelle formation than in water only. The free energy of micellization ΔGM values was more negative in water-ethanolamine mixed solvent system than in pure water indicating more spontaneity in mixed micelle formation in the presence of ethanolamine than in pure water.

scholarly journals Mixed Micellization and Spectroscopic Studies of Anti-Allergic Drug and Non-Ionic Surfactant in the Presence of Ionic Liquid

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2756 ◽  
Author(s):  
Naved Azum ◽  
Malik Abdul Rub ◽  
Abdullah M. Asiri
Keyword(s):  
Ionic Liquid ◽  
Micelle Formation ◽  
Theoretical Models ◽  
Spectroscopic Studies ◽  
Ionic Surfactant ◽  
Surfactant Mixtures ◽  
Mixed Micellization ◽  
Diphenhydramine Hydrochloride ◽  
Synergistic Behavior ◽  
Drug Efficiency

In drug delivery, surfactants are used to reduce side effects and to increase drug efficiency. The present work aimed to study the interaction of diphenhydramine hydrochloride (anti-allergic drug) with TX–45 (non-ionic surfactant) in the absence and presence of ionic liquid (1-hexyl-3-methylimidazolium chloride). The physicochemical parameters were estimated by the surface tension measurement. Various theoretical models (Clint, Rubingh, Motomura, and Maeda) were applied to determine the attractive behavior between drug and surfactant mixtures at the surface and in bulk. The drug and surfactant mixtures exhibit synergistic behavior in the absence and presence of ionic liquid. Several energetic parameters were also estimated with the assistance of regular solution approximation and pseudo phase separation model that indicate micelle formation and adsorption of surfactant at the surface is thermodynamically advantageous. The morphology of pure and mixture of amphiphiles has been estimated by the Tanford and Israelachvili theories. UV-visible spectroscopy was used to quantify the attractive behavior of the drug with surfactant with the help of a binding constant (K).

scholarly journals Detailed Calorimetric Analysis of Mixed Micelle Formation from Aqueous Binary Surfactants for Design of Nanoscale Drug Carriers

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3288
Author(s):  
Ádám Juhász ◽  
László Seres ◽  
Norbert Varga ◽  
Ditta Ungor ◽  
Marek Wojnicki ◽  
...  
Keyword(s):  
Mixed Micelle ◽  
Mixed Micelles ◽  
Drug Carrier ◽  
Micelle Formation ◽  
Water Soluble ◽  
Titration Calorimetry ◽  
Surfactant Mixtures ◽  
Calorimetric Analysis ◽  
Mixed Micelle Formation ◽  
Ideal Mixing

While numerous papers have been published according to the binary surfactant mixtures, only a few articles provide deeper information on the composition dependence of the micellization, and even less work attempts to apply the enhanced feature of the mixed micelles. The most important parameter of the self-assembled surfactants is the critical micelle concentration (cmc), which quantifies the tendency to associate, and provides the Gibbs energy of micellization. Several techniques are known for determining the cmc, but the isothermal titration calorimetry (ITC) can be used to measure both cmc and enthalpy change (ΔmicH) accompanying micelle formation. Outcomes of our calorimetric investigations were evaluated using a self-developed routine for handling ITC data and the thermodynamic parameters of mixed micelle formation were obtained from the nonlinear modelling of temperature- and composition- dependent enthalpograms. In the investigated temperature and micelle mole fractions interval, we observed some intervals where the cmc is lower than the ideal mixing model predicted value. These equimolar binary surfactant mixtures showed higher solubilization ability for poorly water-soluble model drugs than their individual compounds. Thus, the rapid and fairly accurate calorimetric analysis of mixed micelles can lead to the successful design of a nanoscale drug carrier.

Determination of Surfactants Based on Mixed-Micelle Formation

1995 ◽  
Vol 67 (11) ◽  
pp. 1872-1880 ◽  
Author(s):  
Dolores. Sicilia ◽  
Soledad. Rubio ◽  
Dolores. Perez-Bendito
Keyword(s):  
Mixed Micelle ◽  
Micelle Formation ◽  
Mixed Micelle Formation

scholarly journals Traceless native chemical ligation of lipid-modified peptide surfactants by mixed micelle formation

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Shuaijiang Jin ◽  
Roberto J. Brea ◽  
Andrew K. Rudd ◽  
Stuart P. Moon ◽  
Matthew R. Pratt ◽  
...  
Keyword(s):  
Mixed Micelle ◽  
Micelle Formation ◽  
Native Chemical Ligation ◽  
Chemical Ligation ◽  
Mixed Micelle Formation
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