A proton NMR study on aggregation of cationic surfactants in water: effects of the structure of the headgroup

Okano, Laura Tiemi; Seoud, Omar A. El; Halstead, T. K.

doi:10.1007/s003960050063

Cited by 55 publications

(51 citation statements)

References 16 publications

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“…This is perhaps the reason that CDBACl is adsorbed on mercury and forms the condensed film in region A, while this is not possible for CTAB. NMR results have indicated that the benzyl group of CDBACl lies more or less parallel to the interface [43]. It is remarkable that the condensed film in the potential region A is formed in substances that have the benzene ring in their molecules.…”

Section: Discussionmentioning

confidence: 98%

On the adsorption of cetyldimethylbenzylammonium chloride at the mercury/electrolyte solution interface

Avranas¹,

Sedláčková²,

Malasidou³

2005

Journal of Colloid and Interface Science

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Section: Discussionmentioning

confidence: 98%

On the adsorption of cetyldimethylbenzylammonium chloride at the mercury/electrolyte solution interface

Avranas¹,

Sedláčková²,

Malasidou³

2005

Journal of Colloid and Interface Science

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“…The "medium effect" results from the substitution of a sizable part of the hydrocarbon/water contact in the monomer by hydrocarbon/hydrocarbon contact in the aggregate, and the "conformation effect" results from a change in conformation of the alkyl chain. The two effects generally lead to a downfield shift of the 1 H NMR peaks of the aggregated surfactant [72][73][74][75][76].…”

Section: Isotropic L1 Phasementioning

confidence: 98%

Self-assembly and influence of the organic counterion in the ternary systems dodecylamine/acrylic acid/water and dodecylamine/methacrylic acid/water

Hartmann¹,

Dieudonné²,

Sanderson³

2005

Journal of Colloid and Interface Science

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“…Considering that these two surfactant classes differ only in headgroup architecture, the changes in Acmc can be ascribed to the effect of adding an extra -CH2 -to the surfactant hydrophilic part. Because of the presence of the -CH2 -spacer in the surfactant headgroup, the glutarate surfactants have slightly larger headgroups [48].…”

Section: Limiting Surface Tension One Important Function Of the Surfmentioning

confidence: 99%

Economical and Efficient Hybrid Surfactant with Low Fluorine Content for the Stabilisation of Water-in-CO2 Microemulsions

Mohamed

Ardyani

Sagisaka³

et al. 2015

The Journal of Supercritical Fluids

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The article addresses an interesting issue in the development of hybrid surfactants for waterin-CO2 (w/c) microemulsion stabilisation: the role of surfactant headgroup on the surfactant performance. The synthetic procedure, aqueous properties, and phase behaviour of a new hybrid sulfoglutarate surfactant are described. The compound resembles sulfosuccinate surfactants, commonly used to stabilize w/c phases, but with an extra methylene group incorporated into the hydrophilic headgroup. For comparison purposes, the related hydrocarbon (AOT14 and AOT14GLU) and fluorocarbon (di-CF2 and di-CF2GLU) surfactants are used to form w/c microemulsions. In general, the aqueous properties and w/c phase stability of both sulfoglutarates and sulfosuccinates are found to be similar, which shows the secondary role of the hydrophilic headgroup. Interestingly, the newly synthesised hybrid CF2/AOT14GLU (sodium (4H,4H,5H,5H,5H-pentafluoropentyl-2,2-dimethyl-1-propyl)-2-sulfoglutarate) proved to be more efficient than the normal sulfosuccinate, hybrid CF2/AOT14 (Ptrans = 383 bar, γcmc = 26.8 mN m -1 ) in terms of the aqueous behaviour and w/c phase stability.Switching to the sulfoglutarate compound, hybrid CF2/AOT14GLU (Ptrans = 232 bar, γcmc = 20.6 mN m -1 ) more effectively decreases the air-water surface tension by about ~ 5 mN m -1 as compared to the sulfosuccinate. High-pressure phase behaviour studies show significant improvements in stabilising w/c microemulsions at much lower cloud pressures. The results indicate distinct effects of the headgroup structure on the phase behaviour and physicochemical properties, particularly for this hybrid surfactant.

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A proton NMR study on aggregation of cationic surfactants in water: effects of the structure of the headgroup

Cited by 55 publications

References 16 publications

On the adsorption of cetyldimethylbenzylammonium chloride at the mercury/electrolyte solution interface

On the adsorption of cetyldimethylbenzylammonium chloride at the mercury/electrolyte solution interface

Self-assembly and influence of the organic counterion in the ternary systems dodecylamine/acrylic acid/water and dodecylamine/methacrylic acid/water

Economical and Efficient Hybrid Surfactant with Low Fluorine Content for the Stabilisation of Water-in-CO2 Microemulsions

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