Normal micelles and oil-in-water microemulsions in a water-toluene-Tween 80 ternary system

Poteshnova, M. V.; Zadymova, N. M.

doi:10.1134/s1061933x06020128

Cited by 7 publications

(4 citation statements)

References 8 publications

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“…Most noticeably, in the presence of Tween 80, the chemoselectivity of the reaction was dramatically improved, with the homoallylic alcohol product now being formed in >95% selectivity. Studies have demonstrated the partitioning of aromatic compounds in the hydrophobic core of microemulsions with reduced presence in the proximity of the ethylene oxide groups of the surfactant . In the present case, benzaldehyde and allyl bromide would be transported from the CO 2 core to the interface, where more polar species reside.…”

Section: Resultsmentioning

confidence: 71%

“…Studies have demonstrated the partitioning of aromatic compounds in the hydrophobic core of microemulsions with reduced presence in the proximity of the ethylene oxide groups of the surfactant. 37 In the present case, benzaldehyde and allyl bromide would be transported from the CO 2 core to the interface, where more polar species reside.…”

Section: ■ Results and Discussionmentioning

confidence: 72%

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Ultrasound-Induced CO₂/H₂O Emulsions as a Medium for Clean Product Formation and Separation: The Barbier Reaction as a Synthetic Example

Cenci

Cox

Leeke

2014

ACS Sustainable Chem. Eng.

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Subcritical CO 2 /H 2 O (30 °C/80 bar) was employed as a renewable solvent mixture in a 1 dm 3 ultrasound reactor. As a representative synthetic transformation, the metal-mediated Barbier allylation was used to demonstrate the facility of formation and separation of the homoallylic alcohol product. The chemoselectivity over the competing aldehyde reduction could be improved by deploying the biocompatible nonionic surfactant Tween 80, a saturated salt aqueous phase, or by carrying out the reaction at 60 °C/120 bar. All of these modifications led to an apparent rate increase in the desired allylation. A range of substituted benzaldehydes afforded the corresponding homoallylic alcohols in moderate to high yields. The presence of water constituted a necessary condition for efficient product formation, while CO 2 provided an appropriate phase for clean product separation by exploiting a favorable homoallylic alcohol enrichment. In this way, 0.025 mol of homoallylic alcohol product could be isolated from the CO 2 phase in 1 h, avoiding further extraction stages that would typically require organic solvents.

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Section: Resultsmentioning

confidence: 71%

Section: ■ Results and Discussionmentioning

confidence: 72%

Ultrasound-Induced CO₂/H₂O Emulsions as a Medium for Clean Product Formation and Separation: The Barbier Reaction as a Synthetic Example

Cenci

Cox

Leeke

2014

ACS Sustainable Chem. Eng.

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“…The micellar system is the colloidal system that consists of a mixture of water, oil, and an amphiphile surfactant [1], [2]. The amphiphilic surfactant is added to increase its miscibility [3].…”

Section: Introductionmentioning

confidence: 99%

Winsor Phase Diagram of a Colloidal System from the Mixture of Water, Eugenol, and Tween 20

Hayuningtyas

Jitphongsaikul²,

Hamad³

2022

RICE

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One factor that influenced colloidal structure is the composition of water, oil, and surfactant in the emulsions. This study aims to build a Winsor phase diagram of a mixture of water, eugenol, and Tween 20 and understand the physical differences in a range of micellar structures from the different compositions of the combinations. There were eleven samples with varying compositions of water, eugenol, and tween 20, and then were mixed and observed in parameters such as phase, appearance, and consistency. The results showed that the emulsion's compositions ingredients affected the character of the final emulsion. There were three categories of emulsions as described in the Winsor phase diagram. Water in oil (w/o) microemulsion was formed in the higher oil composition. In contrast, the lower oil content was macroemulsion/ coarse emulsion. The balance of oil and water composition was categorized as a bicontinuous microemulsion. This diagram will further help in constructing the suitable emulsion category for specific purposes.

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“…O grupamento que apresenta maior influência neste processo continua sendo os grupos oxietileno. Tais estruturas também podem se apresentar na forma do íon oxônio, em menor proporção, mas em ambos os casos interagem com as proteínas via ligações de hidrogênio [117]. Outros grupamentos que também estão presentes e que podem contribuir para aumentar a eficiência de extração consistem em carbonilas e elétrons localizados em sistemas π, também presentes na molécula de Tween ® 80 [117].…”

Section: Mistura De Surfactantesunclassified

Avaliação e caracterização de sistemas baseados em ponto nuvem visando a remoção de albumina do plasma sanguineo

Silva¹,

Arruda²

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Normal micelles and oil-in-water microemulsions in a water-toluene-Tween 80 ternary system

Cited by 7 publications

References 8 publications

Ultrasound-Induced CO₂/H₂O Emulsions as a Medium for Clean Product Formation and Separation: The Barbier Reaction as a Synthetic Example

Ultrasound-Induced CO₂/H₂O Emulsions as a Medium for Clean Product Formation and Separation: The Barbier Reaction as a Synthetic Example

Winsor Phase Diagram of a Colloidal System from the Mixture of Water, Eugenol, and Tween 20

Avaliação e caracterização de sistemas baseados em ponto nuvem visando a remoção de albumina do plasma sanguineo

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Normal micelles and oil-in-water microemulsions in a water-toluene-Tween 80 ternary system

Cited by 7 publications

References 8 publications

Ultrasound-Induced CO2/H2O Emulsions as a Medium for Clean Product Formation and Separation: The Barbier Reaction as a Synthetic Example

Ultrasound-Induced CO2/H2O Emulsions as a Medium for Clean Product Formation and Separation: The Barbier Reaction as a Synthetic Example

Winsor Phase Diagram of a Colloidal System from the Mixture of Water, Eugenol, and Tween 20

Avaliação e caracterização de sistemas baseados em ponto nuvem visando a remoção de albumina do plasma sanguineo

Contact Info

Product

Resources

About

Ultrasound-Induced CO₂/H₂O Emulsions as a Medium for Clean Product Formation and Separation: The Barbier Reaction as a Synthetic Example

Ultrasound-Induced CO₂/H₂O Emulsions as a Medium for Clean Product Formation and Separation: The Barbier Reaction as a Synthetic Example