Conductometric Studies on the Effect of Temperature and Tetramethylammonium Bromide Salt on the Micellization of Cetyltrimethylammonium Bromide in Aqueous Medium

Esan, Olaseni Segun; Olubunmi, Osundiya Medinat; Olumuyiwa, Aboluwoye Christopher; Olarenwaju, Owoyomi

doi:10.5541/ijot.5000130524

Cited by 14 publications

(14 citation statements)

References 35 publications

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“…Herein, the observed cmc of pure DTAC and DTAC‐CTAB mixed system decreases with the rise of the temperature (Tables ). Again, the cmc of the pure CTAB rises with the augment of the temperature, which is in well agreement with the literature . There was no specific reason for choosing urea except to examine the effect of the urea that is found in the human being.…”

Section: Resultssupporting

confidence: 89%

Mixed micellization study of dodecyltrimethylammonium chloride and cetyltrimethylammonium bromide mixture in aqueous/urea medium at different temperatures: Theoretical and experimental view

Mahbub

Rub

Hoque

et al. 2018

J of Physical Organic Chem

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The behavior of mixed micelle formation between two cationic surfactants‐dodecyltrimethylammonium chloride (DTAC) and cetyltrimethylammonium bromide (CTAB) in absence/attendance of urea has been investigated by means of conductivity measurements over temperature range of 298.15 to 318.15 K. Lower magnitudes of the critical micelle concentration from their ideal values imply the strong interaction between the studied amphiphiles. The micellar mole fraction (X1) on the basis of the different proposed model (Rubingh, Motomura & Rodenas) and the ideal micellar mole fraction (Xid) were evaluated, and estimated results imply the high contribution of CTAB in the mixed micelle formation that enhances with the augment of the mole fraction of the CTAB. The values of activity coefficients (f1 and f2) (less than unity) and negative values of the interaction parameter (β) in all cases signify the attractive interaction between the amphiphiles studied. Spontaneous mixed micelle formation between the studied amphiphiles (dodecyltrimethylammonium chloride and CTAB) was indicated by the negative magnitudes of free energy of micellization (ΔGm0). The negative values of excess free energy of micellization (ΔGex) indicate the higher stability of the mixed micelle compared with the single micelle. The standard enthalpy change of micellization (ΔHm0) and standard entropy change of micellization (ΔSm0) were also calculated and discussed.

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Section: Resultssupporting

confidence: 89%

Mixed micellization study of dodecyltrimethylammonium chloride and cetyltrimethylammonium bromide mixture in aqueous/urea medium at different temperatures: Theoretical and experimental view

Mahbub

Rub

Hoque

et al. 2018

J of Physical Organic Chem

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“…So, there should be an influence of the glucose on the performance of amphiphiles which are utilized in the formulations of medicines. Our previously reported cmc value for TTAB in H 2 O at 303.15 K is 3.63 mmol kg À1 which agree with literature values (Alam et al, 2019a;Clint, 1975;Sristy et al, 2019); however, at the same condition, the cmc of pure CTAB (0.92 mmol kg À1 ) is also come to an agreement with the literature values (Esan et al, 2015;Hoque et al, 2017Hoque et al, , 2018a. Khosharay et al also obtained a cmc value of 0.823 mmol L À1 for CTAB at 298.15 K using surface tension measurement technique (Khosharay et al, 2018).…”

Section: Resultssupporting

confidence: 91%

“…It is reported that with the growing concentration of electrolytes, the size and shape of amphiphile aggregate change from spherical to non-spherical form. The adsorption of surfactants at the air and water interface is affected by the robust electrostatic interaction between the amphiphilic molecules (Clint, 1975;Esan et al, 2015;Hoque et al, 2017Hoque et al, , 2018aMehta et al, 2005). As a result, the degree of adsorption can be expected to be significantly different as compared to the absence of electrolytes in the surfactant solution.…”

Section: Introductionmentioning

confidence: 99%

The Assembly of the Mixture of Two Ionic Surfactants in Polyols Media at Variable Temperatures: Combined Conductivity and Theoretical Investigations

Alam

Mahbub

Alfakeer

et al. 2021

J Surfact & Detergents

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Herein, the aggregation phenomena of the two cationic amphiphiles, the hexadecyltrimethylammonium bromide (CTAB), and tetradecyltrimethylammonium bromide (TTAB), has been investigated in the presence of monosaccharide (glucose) and disaccharide (maltose) at varying compositions and temperatures. The critical micelle concentration (cmc), degree of ionization (g), and several thermodynamic properties have been estimated applying the conductivity measurement technique. To explore the consequence of additives on the mixed micellization of TTAB + CTAB, glucose as monosaccharide having two concentrations (1% & 5% (w/w) glucose) and maltose as disaccharide containing single concentration (1% (w/w)) have been employed. Together with the mixture of TTAB and CTAB, investigation of the physicochemical parameters of pure amphiphiles in glucose and maltose solutions was quantified. The efficiency of the additives in depressing the cmc values followed the order: 1 (w/w) % maltose >5 (w/w) % glucose >1% (w/w) glucose. The ideal cmc (cmcid), activity coefficients, and β values suggested the synergistic attraction (attractive force) between these two surfactants. By utilizing the Rubingh model, the evaluated micellar mole fractions of CTAB (α1) coupled with the ideal mole fraction () imply the increase of the contribution of CTAB in the mixed micellization with rising the α1 values. The values of the negative excess free energy () implied the stability of the mixed micelle formed. The changes in standard enthalpy (ΔH°m) and changes in standard entropy (ΔS°m) of micellization reveal the presence of different modes of interactions like electrostatic, ion‐dipole, H‐bonding, and hydrophobic interactions among the studied components.

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“…The physical methods for CMC determination includes conductivity, solubility, viscosity, light scattering, measuring the surface tension by Wiebelmy slide method or by the method of maximum bubble pressure, measurement of ion activity and by dye incorporation method, Gel filtration spectrophtometrically and counter ion magnetic resonance [2][3][4][5][6]. Some authors had been used the conductivity measurements to study the micellization of; SDS surfactant in water and in propanol-water mixed solvent [7][8][9][10][11][12], other surfactant [13,14] and ionic liquids [15][16][17][18][19]. The density measurements had been used to calculate the molar volume of some surfactants [20] and other substances in different solutions [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Solvation thermodynamic parameters for sodium dodecyl sulfate (SDS) and sodium lauryl ether sulfate (SLES) surfactants in aqueous and alcoholic-aqueous solvents

El–Dossoki

Gomaa

Hamza³

2019

SN Appl. Sci.

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Conductivity of sodium dodecyl sulfate (SDS) and sodium lauryl ether sulfate (SLES) surfactants in aqueous and in alcoholic-aqueous mixed solvents (methanol, ethanol, and glycerol) with different mole fractions of alcohols has been measured experimentally at different temperatures (298.15, 303.15, 308.15 and 313.15 K). Surface tension was also measured experimentally for SDS and SLES in aqueous solution at 298.15 K. Critical micelle concentration (CMC) of both SDS and SLES was determined from the measured conductivity and surface tension data. The CMC was found to increase as the temperature and alcohol mole fraction increased in all solvents used. Depending on the conductivity data, the association constant (K a ) of both SDS and SLES was also determined applying Shedlowsky conductance equation. The thermodynamic parameters (ΔG˚, ΔH˚, and ΔS˚) of the micellization and association processes were evaluated from the temperature dependence of micellization and association constants. The results indicate that the association constant of both SDS and SLES decrease as the temperature and alcohol mole fraction increased in all solvents used. Also it was found that CMC and K a of both SDS and SLES increase in the order: methanol > ethanol > glycerol. The association process was found to be spontaneous one. The density and refractive index of both SDS and SLES in aqueous and in alcoholicaqueous mixed solvents (methanol, ethanol, and glycerol) with different mole fractions of alcohols, has been measured experimentally at 298.15 K. Depending on the density data, the molar volume of the two surfactants was determined and discussed. Also depending on the refractive index data, the molar refraction and the polarizability of both SDS and SLES was calculated and discussed. A computer programs were used for all calculations.

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Conductometric Studies on the Effect of Temperature and Tetramethylammonium Bromide Salt on the Micellization of Cetyltrimethylammonium Bromide in Aqueous Medium

Cited by 14 publications

References 35 publications

Mixed micellization study of dodecyltrimethylammonium chloride and cetyltrimethylammonium bromide mixture in aqueous/urea medium at different temperatures: Theoretical and experimental view

Mixed micellization study of dodecyltrimethylammonium chloride and cetyltrimethylammonium bromide mixture in aqueous/urea medium at different temperatures: Theoretical and experimental view

The Assembly of the Mixture of Two Ionic Surfactants in Polyols Media at Variable Temperatures: Combined Conductivity and Theoretical Investigations

Solvation thermodynamic parameters for sodium dodecyl sulfate (SDS) and sodium lauryl ether sulfate (SLES) surfactants in aqueous and alcoholic-aqueous solvents

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