A simple strategy to improve surface activity and wettability of anionic hydrocarbon and tri-block nonionic short-chain fluorocarbon surfactant mixtures

Abstract Mixing hydrocarbon surfactants with fluorocarbon surfactants is still an important strategy to improve the economic benefits and performances of fluorocarbon surfactants and expand their range of application. Herein, we prepared a novel kind of hydrocarbon-fluorocarbon surfactant mixtures via mixing a cationic surfactant, cetyltrimethylammonium bromide (CTAB), with a tri-block nonionic short-chain fluorocarbon surfactant (F9EG13F9) in aqueous solution. The results showed that adding a small CTAB amount to F9EG13F9 (the molar fraction of CTAB in the mixture (x1) was 0.2) could greatly reduce its critical micelle concentrations (cmc) from 0.408 mmol/L to 0.191 mmol/L. At this x1, the contact angle of the mixture was the minimum (57.7 °) at 100 s on polytetrafluoroethylene film, which was even lower than that of F9EG13F9. Besides, CTAB/F9EG13F9 mixtures possessed better colloidal stability and solubilization ability toward hydrophobic dye (Sudan І) than F9EG13F9. The outstanding performances of binary surfactant mixtures benefited from the non-ideal mixing and strong synergistic effect evidence that CTAB/F9EG13F9 surfactant mixtures could be used in practical applications instead of individual F9EG13F9, thereby reducing the used cost of F9EG13F9. Graphical abstract

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Effect of Organic Ammonium Salts on the Surface Activity and Solubility of Fluorocarbon Surfactant

Acta Physico-Chimica Sinica ◽

10.3866/pku.whxb19961104 ◽

1996 ◽

Vol 12 (11) ◽

pp. 976-980

Author(s):

He Shao-Guang ◽

◽

Zhao Guo-Xi

Keyword(s):

Surface Activity ◽

Ammonium Salts ◽

Fluorocarbon Surfactant

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Solubilization of pada in Hydrocarbon Fluorocarbon Surfactant Mixtures

Australian Journal of Chemistry ◽

10.1071/ch9920769 ◽

1992 ◽

Vol 45 (4) ◽

pp. 769 ◽

Cited By ~ 2

Author(s):

TJ Connolly ◽

VC Reinsborough ◽

XY Xiang

Keyword(s):

Mixed Micelle ◽

Mixed Micelles ◽

Surfactant Mixtures ◽

Critical Micelle Concentrations ◽

Fluorocarbon Surfactant ◽

Surfactant Systems ◽

Sodium Decyl Sulfate ◽

Sodium Perfluorooctanoate

Solubilities of pyridine-2-azo-p-dimethylaniline ( pada ) were determined at 25�C in four mixed fluorocarbon/hydrocarbon short-chained surfactant systems: ( i ) sodium decyl sulfate/sodium perfluoroheptanoate; (ii) sodium octanesulfonate /sodium perfluorooctanoate ; (iii) sodium octanesulfonate /sodium perfluoroheptanoate ; (iv) sodium nonanesulfonate /sodium perfluoroheptanoate. Systems ( i ), (iii) and (iv) showed micellar miscibility (one mixed micelle) and synergistic solubilization effects. System (ii) had two critical micelle concentrations pointing to two micellar forms in solution, and no synergism could be detected. From these four examples, it is deduced that single mixed micelles are formed when the critical micelle concentrations of the pure surfactants are within a factor of 3 of each other.

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Regarding the Effect that Different Hydrocarbon/Fluorocarbon Surfactant Mixtures Have on Their Complexation with HSA

The Journal of Physical Chemistry B ◽

10.1021/jp060795h ◽

2006 ◽

Vol 110 (23) ◽

pp. 11369-11376 ◽

Cited By ~ 25

Author(s):

Elena Blanco ◽

Paula Messina ◽

Juan M. Ruso ◽

Gerardo Prieto ◽

Félix Sarmiento

Keyword(s):

Surfactant Mixtures ◽

Fluorocarbon Surfactant

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Surface Activity and Efficiency of Cat-Anionic Surfactant Mixtures

Frontiers in Chemistry ◽

10.3389/fchem.2021.790873 ◽

2021 ◽

Vol 9 ◽

Author(s):

Camillo La Mesa ◽

Gianfranco Risuleo

Keyword(s):

Surface Tension ◽

Surface Activity ◽

Micelle Formation ◽

Ionic Species ◽

Regular Solution Theory ◽

Solution Theory ◽

Surfactant Mixtures ◽

Pure Species ◽

Head Groups ◽

Moderate Effect

The surface activity of surfactant mixtures is critically analyzed. Cat-anionic systems, in which two ionic species are mixed in non-stoichiometric ratios, are considered. With respect to the solution behavior, where a substantial decrease of cmc is met compared to the pure components, a moderate effect on surface tension, γ, occurs. Compared to the pure species, the decrease of surface tension for such mixtures is not significant, and no clear dependence on the mole fraction anionic/cationic is met. The surface tension is grossly constant in the whole concentration range. Conversely, the interaction parameter for surfaces, βsurf (calculated by the regular solution theory), is more negative than that for micelle formation, βmic. This fact suggests that the desolvation of polar heads of the two species at interfaces is largely different. Very presumably, the underlying rationale finds origin in the sizes and solvation of both polar head groups.

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