Effect of aromatic hydrotropic agents on the cloud point of mixed ionic-nonionic surfactant solutions

Marszall, Leszek

doi:10.1021/la00092a010

Cited by 44 publications

(16 citation statements)

References 3 publications

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“…Again alcohol molecules have the capability of penetrating to the micelles with the hydrophobic parts keeping hydroxyl group at the micelle–solvent interface . This phenomenon declines the electrostatic repulsion between the polar head group of the ionic surfactant, and consequently, micellization is favored . These two opposite effects determine whether cmc of certain surfactant will increase or decrease at a particular concentration of alcohol.…”

Section: Results and Discussionmentioning

confidence: 99%

Influence of Alcohol/Temperature on the Interaction of Sodium Dodecyl Sulfate with Cetyltrimethylammonium Bromide: Experimental and Theoretical Study

Mahbub

Rana

Rub³

et al. 2019

J. Chem. Eng. Data

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This study explores the mixed micellization between anionic surfactant sodium dodecyl sulfate (SDS) and cationic surfactant cetyltrimethylammonium bromide (CTAB) in H 2 O/H 2 O + alcohol mixed medium over a temperature range of 298.15− 318.15 K using the conductivity measurement technique. The experimentally estimated critical micelle concentration (cmc) values are lower than respective ideal cmc (cmc id ), which reveals the presence of the interaction among the surfactants. The cmc values disclose that the presence of lower carbon alcohol (methanol and ethanol) favors the mixed micellization of SDS and CTAB. In the presence of alcohol, the extent of micelle ionization (g) of the system enhances. Different theoretical models (Rubingh/ Motomura/Rodenas) were applied to estimate micellar mole fraction (X 1 ), and the obtained results illustrate the significant participation of CTAB in the mixed micellization. The magnitudes of activity coefficients (f 1 and f 2 < 1) as well as interaction parameter (β < 0) in almost every case clarify the attractive relations between CTAB and SDS. The standard free energy of mixed micellization (ΔG m °) and excess free energy of micellization (ΔG ex ) illustrate the spontaneous mixed micelle formation and greater stability of the SDS + CTAB micelle than that of individual surfactants, respectively. The ΔH m °as well as ΔS m °values of SDS + CTAB micellization were also estimated and illustrated in detail. The values of ΔG m,tr °for SDS + CTAB illustrate that micellization is more spontaneous in the presence of ethanol than in the presence of methanol. The values of ΔH m,tr °and ΔS m,tr °were also calculated and discussed.

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Section: Results and Discussionmentioning

confidence: 99%

Influence of Alcohol/Temperature on the Interaction of Sodium Dodecyl Sulfate with Cetyltrimethylammonium Bromide: Experimental and Theoretical Study

Mahbub

Rana

Rub³

et al. 2019

J. Chem. Eng. Data

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“…Marszall [124] investigated the effect of some typical hydrotropes such as the sodium salts of benzoic (SB), o-hydroxybenzoic (salicylic) (SS), and toluene (STS), xylene (SXS), and cumene (SCS) sulfonic acids on the CP of mixed anionic-nonionic [sodium dodecyl sulfate (SDS)-TX-100] and cationic-nonionic [hexadecyltrimethylammonium bromide (CTAB)-TX-100] surfactant solutions. The incorporation of an anionic or cationic surfactant into nonionic micelles introduces electric charge onto the micellar surface and, in consequence, introduces repulsion between the micelles since the counterion binding is nearly1zero as predicted from various observations [125][126][127][128][129], resulting in the increase in CP due to intermicellar repulsion.…”

Section: Effect Of Organic Additivesmentioning

confidence: 99%

Clouding behaviour in surfactant systems

Mukherjee

Padhan

Dash

et al. 2011

Advances in Colloid and Interface Science

166

109

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“…The addition of less than 5% anionic to nonionic surfactant can reduce the amount of surfactant needed to solubilize equal amounts of oil and water by a factor of four. Phenomenologically, these observations are rationalized in terms of the hydrophilic-lipophilic balance (HLB) of the surfactant mixture (4,8,9), or the relative location of the surfactant-water critical point (10)(11)(12)(13)(14). Many of the structural aspects of anionic-nonionic surfactant mixtures have been observed in droplet and lamellar phases, including changes in phase progression (15,16), droplet size, and lamellar spacing (17,18).…”

Section: Introductionmentioning

confidence: 99%

The Phase Behavior and Microstructure of Efficient Cationic–Nonionic Microemulsions

Silas

Kaler

2001

Journal of Colloid and Interface Science

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Effect of aromatic hydrotropic agents on the cloud point of mixed ionic-nonionic surfactant solutions

Cited by 44 publications

References 3 publications

Influence of Alcohol/Temperature on the Interaction of Sodium Dodecyl Sulfate with Cetyltrimethylammonium Bromide: Experimental and Theoretical Study

Influence of Alcohol/Temperature on the Interaction of Sodium Dodecyl Sulfate with Cetyltrimethylammonium Bromide: Experimental and Theoretical Study

Clouding behaviour in surfactant systems

The Phase Behavior and Microstructure of Efficient Cationic–Nonionic Microemulsions

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