O/W Microemulsions and Hydrotropes: The Coupling Action of a Hydrotrope

Friberg, Stig E.; Brancewicz, Chris; Morrison, David S.

doi:10.1021/la00021a016

Cited by 79 publications

(33 citation statements)

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“…However, from the properties of sodium dodecyl sulfate/sodium xylene sulfonate/water/n-decane/n-pentanol and sodium dodecyl sulfate/sodium xylene sulfonate/water/n-hexane/n-pentanol phase diagrams (24), it follows that the solubilities of apolar compounds in L1 phase can be markedly increased by the addition of a hydrotrope (sodium xylene sulfonate) and a cosurfactant. Furthermore, at a certain hydrotrope concentration, the "coupling action" of the hydrotrope was also demonstrated (24). The coupling action resulted in the establishment of a continuous path from the L2 to the L1 phase through the microemulsion range.…”

Section: Figmentioning

confidence: 99%

Phase Behavior of Sodium Naphthenates, Toluene, and Water

Horváth‐Szabó

Masliyah

Czarnecki

2001

Journal of Colloid and Interface Science

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Section: Figmentioning

confidence: 99%

Phase Behavior of Sodium Naphthenates, Toluene, and Water

Horváth‐Szabó

Masliyah

Czarnecki

2001

Journal of Colloid and Interface Science

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“…The microemulsions had a composition corresponding to one line of SDS concentration (6 wt.%) in the microemulsion region of the phase diagram. This line passes through the aqueous micellar solution, which forms the basis for the O/W microemulsion, a bicontinuous part and the inverse micellar solution, the basis for the W/O microemulsion [11,12].…”

Section: Methodsmentioning

confidence: 99%

Ascorbic acid oxidation in SDS micellar systems

Szymula

2008

J Appl Electrochem

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In this contribution the results of atmospheric and electrochemical oxidation of AA in the SDS micellar solutions and in the microemulsions pentanol/water stabilized by SDS are presented. The hydrophilic vitamin C readily dissolves in water and O/W microemulsions as well as undergoes the irreversible two-electron oxidation reaction. It was found that the atmospheric oxidation of AA is accelerated by the SDS up to the CMC and inhibited in the concentrated SDS solutions. We also found that the rate of atmospheric oxidation of ascorbic acid is higher in the water-in-oil (W/O) than in the oil-in-water (O/W) microemulsions and increases with the increasing oil content. The influence of the SDS on the electrochemical behavior of vitamin C was also studied. The general conclusion emerging from this investigation is that the increasing surfactant concentration shifts the ascorbic acid oxidation potential to higher values whereas the corresponding peak current values diminish. In the microemulsions the AA oxidation is slowed down by increasing the pentanol amount in the system.

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“…Hydrotropes in general are water-soluble and surface-active compounds which can significantly enhance the solubility of organic solutes such as esters, acids, alcohols, aldehydes, ketones, hydrocarbons, and fats [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effect of hydrotropes on solubility and mass transfer coefficient of lauric acid

Kumar

Prakash²,

Gandhi

2009

Korean J. Chem. Eng.

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A comprehensive investigation on the solubility and mass transfer coefficient enhancement of lauric acid through hydrotropy has been undertaken. The solubility and mass transfer studies were carried out using hydrotropes such as sodium cumene sulfonate, sodium p-xylene sulfonate and sodium p-toluene sulfonate under a wide range of hydrotrope concentrations (0 to 3.0 mol/L) and different system temperatures (303 to 333 K). The effectiveness of hydrotropes was measured in terms of Setschnew constant K s and reported for all hydrotropes used in this study. The solubility data are also fitted in a polynomial equation as the function of hydrotrope concentration.

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O/W Microemulsions and Hydrotropes: The Coupling Action of a Hydrotrope

Cited by 79 publications

References 0 publications

Phase Behavior of Sodium Naphthenates, Toluene, and Water

Phase Behavior of Sodium Naphthenates, Toluene, and Water

Ascorbic acid oxidation in SDS micellar systems

Effect of hydrotropes on solubility and mass transfer coefficient of lauric acid

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