Miscibility of fluorocarbon and hydrocarbon surfactants in micelles and liquid mixtures. Basic studies of oil repellent and fire extinguishing agents

Shinoda, Kōzō; Nomura, Tsuyoshi

doi:10.1021/j100441a005

Cited by 231 publications

(178 citation statements)

References 1 publication

Supporting

Mentioning

167

Contrasting

Order By: Relevance

“…Mixtures of fluorocarbon and hydrocarbon surfactants have been extensively studied (47,48,50,56,(59)(60)(61)(62)(63)(64)(65)(66)(67)(68)(69)(70)(71)(72)(73) and are especially interesting because of the potential immisibility of the two types of hydrophobic groups in mixed micelles and the possibility of demixing. The different types of fluorocarbon-hydrocarbon mixed surfactant systems studied have included anionic-anionic (47,48,50,59,60,62,(64)(65)(66)(67)(68)(69), cationic-cationic (63), anionic-cationic (66,69), cationic-anionic (66), and anionicnonionic (56,60), and nonionic-nonionic (64,69) surfactant mixtures.…”

Section: Monomer Concentration and Micelle Compositionmentioning

confidence: 99%

“…The different types of fluorocarbon-hydrocarbon mixed surfactant systems studied have included anionic-anionic (47,48,50,59,60,62,(64)(65)(66)(67)(68)(69), cationic-cationic (63), anionic-cationic (66,69), cationic-anionic (66), and anionicnonionic (56,60), and nonionic-nonionic (64,69) surfactant mixtures.…”

Section: Monomer Concentration and Micelle Compositionmentioning

confidence: 99%

“…anionic-anionic, cationic-cationic or nonionic-nonionic) results often show evidence which suggests that demixing to fluorocarbon-rich and hydrocarbon-rich micelles is occuring. Evidence for this includes significant observed positive deviations from ideal mixing in the behavior of mixed CMCs determined from surface tension (62)(63)(64)(65)(67)(68)(69), ultra-filtration experiments (47,48), and the results of NMR studies of self-diffusion (50). However, the results of neutron scattering experiments on at least one anionic-anionic system indicate that mixed micelles do form (59).…”

Section: Monomer Concentration and Micelle Compositionmentioning

confidence: 99%

See 2 more Smart Citations

Mixed Surfactant Systems

Holland¹,

Rubingh

1992

Mixed Surfactant Systems

251

329

View full text Add to dashboard Cite

The properties and behavior of mixed surfactant systems are discussed in the context of experimental techniques and modeling. The overview begins with a general description of mixed surfactant solutions, followed by a more detailed examination of mixed micelles, surfactant mixtures at interfaces, and the phase behavior of mixed systems. Topics include experimental measurements, approaches to modeling, nonideality, unusual surfactant types, micellar demixing, adsorption at various interfaces, chemical reactions in micelles, precipitation, cloud point phenomena and perspectives on the direction of future research on mixed surfactant systems.Mixed surfactant systems are encountered in nearly all practical applications of surfactants. These mixtures arise from several sources. First is the natural polydispersity of commercial surfactants which results from impurities in starting materials and variability in reaction products during their manufacture. These are less expensive to produce than isomerically pure surfactants and often provide better performance. Second is the deliberate formulation of mixtures of different surfactant types to exploit synergistic behavior in mixed systems or to provide qualitatively different types of performance in a single formulation (e.g. cleaning plus fabric softening). Finally, practical formulations often require the addition of surfactant additives to help control the physical properties of the product or improve its stability.

show abstract

Section: Monomer Concentration and Micelle Compositionmentioning

confidence: 99%

Section: Monomer Concentration and Micelle Compositionmentioning

confidence: 99%

Section: Monomer Concentration and Micelle Compositionmentioning

confidence: 99%

See 1 more Smart Citation

Mixed Surfactant Systems

Holland¹,

Rubingh

1992

Mixed Surfactant Systems

251

329

View full text Add to dashboard Cite

show abstract

“…[2] Then regular solution model can be used to simulate the CMC of such a nonideal mixtures. [3] The variation of mixture CMC for many systems were simulated by the regular solution model using only the CMC of pure components and the interaction parameter. However, the method using the useful regular solution model cannot give the correct interaction parameter as well as a priori prediction of mixture CMC without experimental mixture CMC.…”

mentioning

confidence: 99%

Aqueous Solution Properties of Pyridinium-Type Perfluorinated Surfactants and Simulation of Mixture CMC

Asakawa

Ishikawa²,

Miyagishi³

2001

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

“…Our results indicate that a ratio in CMC values of the two pure shortchained surfactants of about five or greater is required for two types of micelles to be formed, whereas below five one mixed micelle is to be expected. Shinoda and Nomura state that micellar incompatibility or two micelles will be the case when the chain lengths of both surfactants are sufficiently long (20). For short-chained surfactant mixtures such as we are concerned with here, our work shows that a further condition for a single micellar form in solution is that the CMC's of the pure surfactants be close together.…”

Section: Snsispfh Systemmentioning

confidence: 66%

Micellar rate enhancement studies in mixed sodium fluorocarbon/hydrocarbon surfactant solutions

Connolly¹,

Reinsborough²

1992

Can. J. Chem.

View full text Add to dashboard Cite

. Can. J. Chem. 70, 1581Chem. 70, (1992. Stopped-flow kinetic studies were conducted in mixed micellar solutions of fluorocarbon and hydrocarbon anionic surfactants to determine the prevalent micellar form. The probe reaction was the ~i,~~/~~ridine-2-azo-~-dimeth~lani-line (PADA) complexation, which is many times accelerated in the presence of anionic micelles. Binding constants for Ni,;+ and PADA partitioning between bulk solution and micelles were determined through the murexide technique and solubility measurements respectively and the molar reaction volume was obtained from the Robinson equation. The three binary surfactant systems investigated had sodium perfluoroheptanoate as the fluorocarbon surfactant while the hydrocarbon surfactants were sodium decylsulfate, sodium nonanesulfonate, and sodium octanesulfonate. The kinetic results were consistent with unimicellar composition in all three systems which was not the behaviour previously found with the sodium octane sulfonate / sodium perfluoroctanoate system. The difference was attributed to closer similarity in the surfactant pair hydrophobicities as revealed through their critical micelle concentrations. Another finding was that mixed micelles synergistically can lead to a much greater solubilization of PADA than is possible through either of the pure surfactants.TERRENCE J. CONNOLLY et VINCENT C. REINSBOROUGH. Can. J. Chem. 70, 158 1 (1992). Dans le but de determiner la forme micellaire prevalante, on a realis6 des Ctudes cinetiques a flux stoppC sur des solutions micellaires d'agents de surface anioniques fluoro-et hydro-carbonCs. La rCaction indicatrice utilisCe est la complexation ~i,~+/~~ridine-2-azo-~-dim~th~laniline (PADA) qui est fortement accC1CrCe en prCsence de micelles anioniques. Les constantes de fixation du Ni$+ et de partition du PADA entre la masse de la solution et les micelles ont Ct C dCterminCes respectivement B l'aide de la technique du murexide et de mesures de solubilitC et on a CvaluC le volume molaire de la reaction grdce B 1'Cquation de Robinson. Les trois systkmes binaires d'agents de surface Ctudies contenaient du perfluoroheptanoate de sodium comme agent de surface fluorocarbonC alors que les agents de surface hydrocarbonCs Ctaient le dCcylsulfate de sodium, nonanesulfonate de sodium et octanesulfonate de sodium. Dans les trois systbmes, les rCsultats cinetiques sont en accord avec la composition unirnicellaire; ce comportement est diffCrent de celui observe antkrieurement avec le systbme octanesulfonate de sodium / perfluorooctanoate de.sodium. On attribue la difference B la plus grande similarit6 dans les hydrophobicites des paires d'agents de surface qui sont rCvClCes par leurs concentrations micellaires critiques. Une autre observation a trait au fait que les micelles mixtes peuvent agir par synergie pour conduire i une solubilisation beaucoup plus grande du PADA que celle possible par chacun des agents de surface agissant seuls.[Traduit par la rCdaction]

show abstract

Miscibility of fluorocarbon and hydrocarbon surfactants in micelles and liquid mixtures. Basic studies of oil repellent and fire extinguishing agents

Cited by 231 publications

References 1 publication

Mixed Surfactant Systems

Mixed Surfactant Systems

Aqueous Solution Properties of Pyridinium-Type Perfluorinated Surfactants and Simulation of Mixture CMC

Micellar rate enhancement studies in mixed sodium fluorocarbon/hydrocarbon surfactant solutions

Contact Info

Product

Resources

About