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Water-in-CO2 Microemulsions Stabilized by Fluorinated Cation-Anion Surfactant Pairs

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Water-in-CO2 Microemulsions Stabilized by Fluorinated Cation-Anion Surfactant Pairs. / Sagisaka, Masanobu; Saito, Tatsuya; Yoshizawa, Atsushi; Rogers, Sarah E.; Guittard, Frédéric; Hill, Christopher; Eastoe, Julian; Blesic, Marijana.

In: Langmuir, Vol. 35, No. 9, 05.03.2019, p. 3445-3454.

Research output: Contribution to journalArticle

Harvard

Sagisaka, M, Saito, T, Yoshizawa, A, Rogers, SE, Guittard, F, Hill, C, Eastoe, J & Blesic, M 2019, 'Water-in-CO2 Microemulsions Stabilized by Fluorinated Cation-Anion Surfactant Pairs', Langmuir, vol. 35, no. 9, pp. 3445-3454. https://doi.org/10.1021/acs.langmuir.8b03942

APA

Sagisaka, M., Saito, T., Yoshizawa, A., Rogers, S. E., Guittard, F., Hill, C., ... Blesic, M. (2019). Water-in-CO2 Microemulsions Stabilized by Fluorinated Cation-Anion Surfactant Pairs. Langmuir, 35(9), 3445-3454. https://doi.org/10.1021/acs.langmuir.8b03942

Vancouver

Sagisaka M, Saito T, Yoshizawa A, Rogers SE, Guittard F, Hill C et al. Water-in-CO2 Microemulsions Stabilized by Fluorinated Cation-Anion Surfactant Pairs. Langmuir. 2019 Mar 5;35(9):3445-3454. https://doi.org/10.1021/acs.langmuir.8b03942

Author

Sagisaka, Masanobu ; Saito, Tatsuya ; Yoshizawa, Atsushi ; Rogers, Sarah E. ; Guittard, Frédéric ; Hill, Christopher ; Eastoe, Julian ; Blesic, Marijana. / Water-in-CO2 Microemulsions Stabilized by Fluorinated Cation-Anion Surfactant Pairs. In: Langmuir. 2019 ; Vol. 35, No. 9. pp. 3445-3454.

Bibtex

@article{8cd1b632d5524829a409a2d8954db453,
title = "Water-in-CO2 Microemulsions Stabilized by Fluorinated Cation-Anion Surfactant Pairs",
abstract = "High-water-content water-in-supercritical CO2 (W/CO2) microemulsions are considered to be green, universal solvents, having both polar and nonpolar domains. Unfortunately, these systems generally require environmentally unacceptable stabilizers like long and/or multifluorocarbon-tail surfactants. Here, a series of catanionic surfactants having more environmentally friendly fluorinated C4-C6 tails have been studied in terms of interfacial properties, aggregation behavior, and solubilizing power in water and/or CO2. Surface tensions and critical micelle concentrations of these catanionic surfactants are, respectively, lowered by ∼9 mN/m and 100 times than those of the constituent single fluorocarbon-tail surfactants. Disklike micelles in water were observed above the respective critical micelle concentrations, implying the catanionic surfactants have a high critical packing parameter, which should be suitable for the formation of reverse micelles. Based on visual observation of phase behavior and Fourier transform infrared spectroscopic and small-angle neutron scattering studies, one of the three catanionic surfactants tested was found to form transparent single-phase W/CO2 microemulsions with a water-to-surfactant molar ratio of up to ∼50. This is the first successful demonstration of the formation of W/CO2 microemulsions by synergistic ion-pairing of anionic and cationic single-tail surfactants. This indicates that catanionic surfactants offer a promising approach to generate high-water-content W/CO2 microemulsions.",
author = "Masanobu Sagisaka and Tatsuya Saito and Atsushi Yoshizawa and Rogers, {Sarah E.} and Fr{\'e}d{\'e}ric Guittard and Christopher Hill and Julian Eastoe and Marijana Blesic",
year = "2019",
month = "3",
day = "5",
doi = "10.1021/acs.langmuir.8b03942",
language = "English",
volume = "35",
pages = "3445--3454",
journal = "Langmuir",
issn = "0743-7463",
publisher = "American Chemical Society",
number = "9",

}

RIS - suitable for import to EndNote

TY - JOUR

T1 - Water-in-CO2 Microemulsions Stabilized by Fluorinated Cation-Anion Surfactant Pairs

AU - Sagisaka, Masanobu

AU - Saito, Tatsuya

AU - Yoshizawa, Atsushi

AU - Rogers, Sarah E.

AU - Guittard, Frédéric

AU - Hill, Christopher

AU - Eastoe, Julian

AU - Blesic, Marijana

PY - 2019/3/5

Y1 - 2019/3/5

N2 - High-water-content water-in-supercritical CO2 (W/CO2) microemulsions are considered to be green, universal solvents, having both polar and nonpolar domains. Unfortunately, these systems generally require environmentally unacceptable stabilizers like long and/or multifluorocarbon-tail surfactants. Here, a series of catanionic surfactants having more environmentally friendly fluorinated C4-C6 tails have been studied in terms of interfacial properties, aggregation behavior, and solubilizing power in water and/or CO2. Surface tensions and critical micelle concentrations of these catanionic surfactants are, respectively, lowered by ∼9 mN/m and 100 times than those of the constituent single fluorocarbon-tail surfactants. Disklike micelles in water were observed above the respective critical micelle concentrations, implying the catanionic surfactants have a high critical packing parameter, which should be suitable for the formation of reverse micelles. Based on visual observation of phase behavior and Fourier transform infrared spectroscopic and small-angle neutron scattering studies, one of the three catanionic surfactants tested was found to form transparent single-phase W/CO2 microemulsions with a water-to-surfactant molar ratio of up to ∼50. This is the first successful demonstration of the formation of W/CO2 microemulsions by synergistic ion-pairing of anionic and cationic single-tail surfactants. This indicates that catanionic surfactants offer a promising approach to generate high-water-content W/CO2 microemulsions.

AB - High-water-content water-in-supercritical CO2 (W/CO2) microemulsions are considered to be green, universal solvents, having both polar and nonpolar domains. Unfortunately, these systems generally require environmentally unacceptable stabilizers like long and/or multifluorocarbon-tail surfactants. Here, a series of catanionic surfactants having more environmentally friendly fluorinated C4-C6 tails have been studied in terms of interfacial properties, aggregation behavior, and solubilizing power in water and/or CO2. Surface tensions and critical micelle concentrations of these catanionic surfactants are, respectively, lowered by ∼9 mN/m and 100 times than those of the constituent single fluorocarbon-tail surfactants. Disklike micelles in water were observed above the respective critical micelle concentrations, implying the catanionic surfactants have a high critical packing parameter, which should be suitable for the formation of reverse micelles. Based on visual observation of phase behavior and Fourier transform infrared spectroscopic and small-angle neutron scattering studies, one of the three catanionic surfactants tested was found to form transparent single-phase W/CO2 microemulsions with a water-to-surfactant molar ratio of up to ∼50. This is the first successful demonstration of the formation of W/CO2 microemulsions by synergistic ion-pairing of anionic and cationic single-tail surfactants. This indicates that catanionic surfactants offer a promising approach to generate high-water-content W/CO2 microemulsions.

UR - http://www.scopus.com/inward/record.url?scp=85062392478&partnerID=8YFLogxK

U2 - 10.1021/acs.langmuir.8b03942

DO - 10.1021/acs.langmuir.8b03942

M3 - Article

VL - 35

SP - 3445

EP - 3454

JO - Langmuir

JF - Langmuir

SN - 0743-7463

IS - 9

ER -