Formation of Mixed Micelle in an Aqueous Mixture of a Surface Active Ionic Liquid and a Conventional Surfactant: Experiment and Modeling

Das, Satya P.; Ghosh, Soumen; Das, Bijan

doi:10.1021/acs.jced.8b00372

Cited by 43 publications

(36 citation statements)

References 67 publications

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“…The values of activity coefficients can be used to calculate the excess free energy of mixed micellization G a ex by using the following equation ( 28). (Clint, 1975;Motomura et al, 1984;Rodenas et al, 1999;Kabir-ud et al, 2010;Kumar and Rub, 2017;Azum et al, 2018;Das et al, 2018;Hoque et al, 2018;Kumar et al, 2018a;Pal and Punia, 2019a).…”

Section: Various Theoretical Modelsmentioning

confidence: 99%

Scrutinizing Self-Assembly, Surface Activity and Aggregation Behavior of Mixtures of Imidazolium Based Ionic Liquids and Surfactants: A Comprehensive Review

Kumar

Kaur

2021

Front. Chem.

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The desire of improving various processes like enhanced oil recovery (EOR), water treatment technologies, biomass extraction, organic synthesis, carbon capture etc. in which conventional surfactants have been traditionally utilized; prompted various researchers to explore the self-assembly and aggregation behavior of different kinds of surface-active molecules. Ionic liquids (ILs) with long alkyl chain present in their structure constitute the advantageous properties of surfactant and ILs, hence termed as surface-active ionic liquids (SAILs). The addition of ILs and SAILs significantly influence the surface-activity and aggregation behavior of industrially useful conventional surfactants. After a brief review of ILs, SAILs and surfactants, the prime focus is made on analyzing the self-assembly of SAILs and the mixed micellization behavior of conventional surfactants with different ILs.

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Section: Various Theoretical Modelsmentioning

confidence: 99%

Scrutinizing Self-Assembly, Surface Activity and Aggregation Behavior of Mixtures of Imidazolium Based Ionic Liquids and Surfactants: A Comprehensive Review

Kumar

Kaur

2021

Front. Chem.

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“…The micellar mole fraction of constituent 1 (

X_{1}^{M}

) is further determined based on the Motomura model, which has taken into account the dissociation of amphiphilic molecules into ions. For this, the following equation has been utilized (Das et al, 2018; Mahajan and Sharma, 2011; Motomura et al, 1984).

X_{1}^{M} = \overset{α_{1}}{true} - \frac{((), \overset{α_{1}}{true} \overset{α_{2}}{true} / \overset{cmc}{true}) {(\partial \overset{false¯}{italiccmc} / \partial \overset{false¯}{α_{1}})}_{T, P}}{1 - \frac{δ υ_{1, c} . υ_{2, d}}{υ_{1, c} . υ_{2} \overset{α_{1}}{true} + υ_{2, d} . υ_{1} \overset{α_{2}}{true}}}

where υ 1, c stands for component 1, i.e., SAIL breaking down into a‐ions and c‐ ions, and υ 2, d denotes component 2, i.e., SDS, dissociating into b‐ions and d‐ions.…”

Section: Resultsmentioning

confidence: 99%

“…The obtained values of

f_{1}^{Rub} / f_{1}^{M} / f_{1}^{Rod}

and

f_{2}^{Rub} / f_{2}^{M} / f_{2}^{Rod}

have been shown in Tables 3 and 4. The values of activity coefficients based on all the three proposed models have been further utilized to evaluate the excess free energy of mixed micellization by using the following equation (Azum et al, 2018; Das et al, 2018; Kabir‐ud et al, 2010; Rodenas et al, 1999):

{∆ G}_{ex}^{a} = italicRT ({}, X_{1}^{a} \ln f_{1}^{a} + ((), 1 - X_{1}^{a}) \ln f_{2}^{a})

where

{∆ G}_{ex}^{a}

symbolizes

{∆ G}_{ex}^{Rub} / {∆ G}_{m}^{M} / {∆ G}_{m}^{Rod}

based on the Rubingh, Motomura, and Rodenas models. The values of

{∆ G}_{ex}^{Rub} / {∆ G}_{m}^{M} / {∆ G}_{m}^{Rod}

obtained for both the mixed systems at all the mole fractions of SAIL, as well as temperatures, have been reported in Tables 3 and 4.…”

Section: Resultsmentioning

confidence: 99%

“…The cmc values obtained are confirmed via surface tension measurements of [C 3 mim][DS]+SDS and [C 6 mim][DS]+SDS mixed systems at 298.15 K along with the evaluation of other important surface‐active parameters. In addition, the mixed micellar parameters have been evaluated by applying the theoretical models of Clint, Rubingh, Motomura, and Rodenas (Clint, 1975; Das et al, 2018; Motomura et al, 1984). The aim of this study is to illuminate the effect of substituent groups, temperature, and concentration on the mixed micellization behavior and thermodynamic properties of [C 3 mim][DS]+SDS and [C 6 mim][DS]+SDS mixed systems.…”

Section: Introductionmentioning

confidence: 99%

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Aggregation Behavior of Mixed Micellar System of Dodecyl Sulfate‐Based Surface‐Active Ionic Liquids and Anionic Surfactant in Aqueous Media

Kumar

Kaur

2020

J Surfact & Detergents

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Mixed micellization behavior of dodecyl sulfate‐based ionic liquids, i.e., 1‐propyl‐3‐methylimidazolium dodecyl sulfate [C3mim][DS] and 1‐hexyl‐3‐methylimidazolium dodecyl sulfate [C6mim][DS] with sodium dodecyl sulfate (SDS), is investigated at (298.15, 308.15, and 318.15) K in aqueous medium. For this, the conductometric measurements are carried out to evaluate the critical micelle concentrations (cmc), ideal critical micelle concentration (cmc*), degree of counterion dissociation (g), thermodynamic parameters, micellar mole fraction of ionic liquids, and interaction parameter (β) of the mixed system based on the different proposed models given in the literature. Further surface tension measurements have been carried out to confirm the value of cmc obtained via a conductivity study for all the studied systems at 298.15 K. Other surface parameters, such as surface tension at cmc (γcmc), surface pressure (ᴨcmc), surface excess (Γmax), and minimum area per molecule (Amin), have also been evaluated for both the systems.

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“…From the RST model, (Rubingh and Mittal, 1979) different thermodynamic parameters can be derived (Das et al, 2018), assuming that the excess entropy of mixing is zero, as has been performed for other surfactant mixtures (Patel et al, 2017;Ren et al, 2017aRen et al, , 2017bRosen and Kunjappu, 2012;Schulz et al, 2013;Sikorska et al, 2016). Gibbs excess free energy (G Ex ), excess enthalpy (H Ex ), and enthalpy of micellization (ΔH m ) can be calculated using Equation 13 (Patel et al, 2017;Ren et al, 2017aRen et al, , 2017b:…”

Section: Thermodynamics Of Micellizationmentioning

confidence: 99%

Theoretical Approaches on the Synergistic Interaction between Double‐Headed Anionic Amino Acid‐Based Surfactants and Hexadecyltrimethylammonium Bromide

Barai

Mandal

Sultana

et al. 2020

J Surfact & Detergents

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Theoretical investigations on the micellization of mixtures of (i) amino acid‐based anionic surfactants [AAS: N‐dodecyl derivatives of aminomalonate, −aspartate, and ‐glutamate] and (ii) hexadecyltrimethylammonium bromide (HTAB), were carried out at different mole ratios. Variation in the theoretical values of critical micelle concentration (CMC), mole fraction of surfactants in the micellar phase (X), at the interface (Xσ), interaction parameters at the bulk/interface (βR/βσ), ideality/nonideality of the mixing processes, and activity coefficients (f) were evaluated using Rubingh, Rosen, Motomora, and Sarmoria‐Puvvada‐Blankschtein models. CMC values significantly deviate from the theroretically calculated values, indicating associative interaction. With increasing mole fraction of AAS (αAAS), the magnitude of the (βR/βσ) values gradually decreased, considered to attributable to hydrophobic interactions. With increasing αAAS, the micellar mole fraction of HTAB (X2) decreased insignificantly and X2 values were higher than those compared to AAS for all combinations, due to the dominance of HTAB in micelles. Micellar mole fraction at the ideal state of AAS (X1ideal) differed from micellar mole fraction of AAS (X1), indicating nonideality in the mixed micellization process. Gibbs free energy of micellization ( ∆Gm) values are more negative than the free energy of micellization for ideal mixing (∆Gmideal), indicating the micellization process is spontaneous. With increasing αAAS, the enthalpy of micellization (ΔHm) and entropy of micellization (ΔSm) values gradually increased, which indicates micellization is exothermic. The different physicochemical parameters of the mixed micelles are correlated with the variation in the spacer length between the two carboxylate groups of AAS.

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Formation of Mixed Micelle in an Aqueous Mixture of a Surface Active Ionic Liquid and a Conventional Surfactant: Experiment and Modeling

Cited by 43 publications

References 67 publications

Scrutinizing Self-Assembly, Surface Activity and Aggregation Behavior of Mixtures of Imidazolium Based Ionic Liquids and Surfactants: A Comprehensive Review

Scrutinizing Self-Assembly, Surface Activity and Aggregation Behavior of Mixtures of Imidazolium Based Ionic Liquids and Surfactants: A Comprehensive Review

Aggregation Behavior of Mixed Micellar System of Dodecyl Sulfate‐Based Surface‐Active Ionic Liquids and Anionic Surfactant in Aqueous Media

Theoretical Approaches on the Synergistic Interaction between Double‐Headed Anionic Amino Acid‐Based Surfactants and Hexadecyltrimethylammonium Bromide

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