Amphiphile Behavior in Mixed Solvent Media I: Self-Aggregation and Ion Association of Sodium Dodecylsulfate in 1,4-Dioxane–Water and Methanol–Water Media

Abstract Fabrication and general performance characteristics of novel screen-printed sensors for potentiometric determination of sodium dodecylsulfate (SDS) are described. The sensors are based on the use of ion-association complexes of SDS with cetylpyridinium chloride (electrode I) and cetyltrimethylammonium bromide (electrode II) as exchange sites in a screen-printed electrode matrix. Electrodes (I) and (II) show fast, stable, and near-Nernstian response for the mono-charge anion of SDS over the concentration range of1 × 10–2 – 5.8 × 10–7 and 1 × 10–2 – 6.3 × 10–7 mol/L at 25°C and the pH range of 2.0–9.0 and 2.0–8.0 with anionic slope of 57.32 ± 0.81 and 56.58 ± 0.65 mV/decade, respectively. Electrodes (I) and (II) have lower LODs of 5.8 × 10–7 and 6.3 × 10–7 mol/L and response times of about 8 and 13 s, respectively. Shelf life of5 months for both electrodes is adequate. Selectivity coefficients of SDS related to a number of interfering cations, and some inorganic compounds were investigated. There were negligible interferences causedby most of the investigated species. The direct determination of 0.10–13.50 mg of SDS by electrodes (I) and (II) shows average recoveries of 99.96 and 99.85%, and mean RSDs of 0.83 and 1.04%, respectively. In the present investigation, both electrodes were used successfully as end point indicators for determination of SDS in pure pharmaceutical preparations and real spiked water samples. The results obtained using the proposed sensors to determine SDS in solution compared favorably with those obtained by thestandard addition method.

Download Full-text

Interaction between sodium dodecylsulfate (SDS) and pluronic (L61) in aqueous medium: assessment of the nature and morphology of the formed mixed aggregates by NMR, EPR, SANS and FF-TEM measurements

Physical Chemistry Chemical Physics ◽

10.1039/d0cp06227h ◽

2021 ◽

Author(s):

Gorthy K S Prameela ◽

Bandaru V. N. Phani Kumar ◽

J. Subramanian ◽

Koji Tsuchiya ◽

Animesh Pan ◽

...

Keyword(s):

Aqueous Medium ◽

Sodium Dodecylsulfate ◽

Mixed Aggregates ◽

Self Aggregation

Interaction of the copolymer L61 i.e., (EO)2(PO)32(EO)2 (where EO and PO are ethylene and propylene oxides, respectively) with the surfactant SDS (Sodium Dodecylsulfate) in relation to their self-aggregation, dynamics and...

Download Full-text

Micellization behavior of mixed surfactants in pure water and methanol-water mixed solvent media by density methods

BIBECHANA ◽

10.3126/bibechana.v13i0.13887 ◽

2015 ◽

Vol 13 ◽

pp. 114-120

Author(s):

Ajaya Bhattarai ◽

Kavita Pathak ◽

Bikash Dev

Keyword(s):

Room Temperature ◽

Mixed Solvent ◽

Volume Fraction ◽

Pure Water ◽

Sodium Dodecylsulfate ◽

Entire Concentration Range ◽

Density Methods ◽

The Given ◽

Rich Mixtures ◽

Micellization Behavior

The properties of anionic-rich and cationic-rich mixtures of dodecyltrimethylammonium bromide (DTAB) and sodium dodecylsulfate (SDS) in pure water and methanol-water mixed solvent media were studied using density measurements at room temperature. The results showed that density increases with increasing concentration of surfactant mixture over the entire concentration range investigated in pure water and in the given mixed solvent media and which are found to decrease with an increase in the volume fraction of methanol in the solvent composition. The critical micelle concentration increases with the increase in volume fraction of methanol for both the anionic-rich (SDS-DTAB) and cationic-rich (DTAB-SDS) systems.BIBECHANA 13 (2016) 114-120

Download Full-text

SOLVENT EFFECTS ON THE THERMODYNAMICS OF SOLVATION OF BARIUUM DIPHENYLAMINESULFONATE IN ETHANOL-WATER MIXED SOLVENTS

Southern Brazilian Journal of Chemistry - Southern Brazilian Journal of Chemistry, Volume 28, No. 28, 2020 ◽

10.48141/sbjchem.v21.n21.2013.31_revista2013.pdf ◽

2013 ◽

Vol 21 (21) ◽

pp. 31-40

Author(s):

Esam A. GOMAA ◽

Elsayed M. ABOU ELLEET ◽

E. T. HELMY ◽

Sh. M. DEFRAWY

Keyword(s):

Gibbs Energy ◽

Thermodynamic Functions ◽

Mixed Solvent ◽

Mixed Solvents ◽

Ion Association ◽

Solvent Mixtures ◽

Free Energies ◽

Solvent Interactions ◽

Solution Processes ◽

Solvation Processes

The aim of this study was to determine the thermodynamic functions, Gibbs energy, enthalpy, and entropy for the solution processes of barium diphenylaminesulfonate in the mixed solvent (ethanol+water) were calculated from solubility values obtained at temperatures ranging from 293.15 K to 308.15 K. The respective thermodynamic, functions for mixing and solvation processes, as well as the activity coefficients for the solute were calculated. The solubility of solutes in mixed solvents depends primarily on the solvation of the solutes or their constituent ions by the components of the solvent mixtures. In this study, the solubility of this barium diphenyla1ninesuifonate in the mixed solvent (ethanol + water by value percent of ethanol= 0, 20, 40, 60, 80, and 100% by volume), was determined at different temperature by the solvent evaporation method. The results enable us to estimate the value of thermodynamic solubility product, Kop(th), of barium diphenylaminesulfonate in the mixed solvent. In addition, Gibbs energy, enthalpy, entropy for the solution processes, and free energies of transfer of barium diphenyla1ninesulfonate units from water to the ethanol solutions were also calculated in order to estimate the contributions of solute-solvent interactions related to ion association are based on changes in the electrostatic properties of the solvent, solute, and ion salvation as itself as on the ionic strength of the medium.

Download Full-text

Physicochemical perspectives (aggregation, structure and dynamics) of interaction between pluronic (L31) and surfactant (SDS)

Physical Chemistry Chemical Physics ◽

10.1039/c5cp04910e ◽

2015 ◽

Vol 17 (45) ◽

pp. 30560-30569 ◽

Cited By ~ 18

Author(s):

G. K. S. Prameela ◽

B. V. N. Phani Kumar ◽

A. Pan ◽

V. K. Aswal ◽

J. Subramanian ◽

...

Keyword(s):

Aqueous Solution ◽

Block Copolymer ◽

Anionic Surfactant ◽

Sodium Dodecylsulfate ◽

Water Soluble ◽

Structure And Dynamics ◽

Aggregation Structure ◽

Self Aggregation

The influence of the water soluble non-ionic tri-block copolymer L31 on the microstructure and self-aggregation dynamics of the anionic surfactant sodium dodecylsulfate (SDS) in aqueous solution was investigated.

Download Full-text