Properties of Decylammonium Chloride and Cesium Perfluorooctanoate at Interfaces and Standard Free Energy of Their Adsorption

Jańczuk, Bronisław; Sierra, Juan Antonio Méndez; González-Martı́n, M.L.; Bruque, J.M.; Wójcik, Wiesław

doi:10.1006/jcis.1997.5054

Cited by 53 publications

(57 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5) permits us to determine max and G respectively by [12] where n = 4 for nFHD and n = 6 for tFOD. (20,21), it is in good accordance with that estimated from the model proposed by Janczúk et al (22). This model is based upon the assumption that in the adsorbed state, the hydrophobic tail of the surfactant is localized in the air phase and the hydrophilic head remains in the liquid phase.…”

Section: Influence Of Methanol On the Adsorption Of Nfhd And Tfodsupporting

confidence: 80%

“…Hence for perfluoroalkanes from perfluoropentane to perfluorononane γ F = 12 ± 2 mN · m −1 and γ water/F = 51.3 ± 0.1 mN · m −1 at 20 • C. A least-squares analysis of the volume of hydrocarbon and fluorocarbon molecules in the liquid phase has shown a good accordance between the experimental values and the values calculated by assuming that the molecule is included in a parallelepiped defined by the length l + 2δ and the width ω + 2δ where l and ω are respectively the length and the width of the molecule, and 2δ corresponds to the intermolecular distance (22). Hence it enables the evaluation of the contactable area of the molecule from the equation…”

Section: Influence Of Methanol On the Adsorption Of Nfhd And Tfodsupporting

confidence: 53%

See 1 more Smart Citation

Thermodynamic Investigation of the Micellization and the Adsorption of Short Perfluoroalkylated Diols via Fluorescence Spectroscopy and Tensiometry

Damas

Frochot

Naejus

et al. 2001

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Section: Influence Of Methanol On the Adsorption Of Nfhd And Tfodsupporting

confidence: 80%

Section: Influence Of Methanol On the Adsorption Of Nfhd And Tfodsupporting

confidence: 53%

Thermodynamic Investigation of the Micellization and the Adsorption of Short Perfluoroalkylated Diols via Fluorescence Spectroscopy and Tensiometry

Damas

Frochot

Naejus

et al. 2001

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

“…The minimal values of the surface tension of aqueous solutions of SDDS and SHS mixtures with alcohols practically do not depend on the kind of surfactant and alcohol and composition of the mixtures and are achieved at nearly the same activity of alcohol in the bulk phase. The minimal values are close to the surface tension of hexadecane (26.35 mN/m) [34].…”

Section: Surface Tension Isothermsmentioning

confidence: 89%

Behavior of Anionic Surfactants and Short Chain Alcohols Mixtures in the Monolayer at the Water–Air Interface

Zdziennicka

Jańczuk

2010

J Surfact & Detergents

View full text Add to dashboard Cite

Measurements of the surface tension of aqueous solution of mixtures of sodium dodecyl sulfate (SDDS) with methanol and ethanol in SDDS concentration range from 10 -5 to 10 -2 M and mixtures of sodium hexadecyl sulfonate (SHS) with methanol and ethanol at SHS concentration from 10 -5 to 8 9 10 -4 M and for methanol and ethanol from 0 to 21.1 and, 11.97 M, respectively, were carried out at 293 K. Moreover, the surface tension of aqueous solution mixtures of SDDS with propanol in the concentration range from 0 to 6.67 M taken from the literature was also considered. The results obtained indicate that it is possible to describe the relationship between the surface tension and molar concentration or molar fraction of alcohol by Szyszkowski and Connors equations. However, the Fainerman and Miller equation allows us to predict the isotherm of the surfactant tension at constant anionic surfactants concentration at which their molecules are present in the solution in the monomeric form if the molar area of surfactants and alcohols can be determined. Based on the surface tension isotherms, the Gibbs surface excess of anionic surfactants and alcohols concentration at water-air interface was determined and then recalculated for Guggenheim-Adam surface excess concentration of these substrates, and next the molar fraction of alcohols and surfactants in the surface layer was determined. These molar fractions were discussed with regard to surfactant and alcohol standard free energy of adsorption at the water-air interface determined from Langmuir and Aronson and Rosen equations. The standard free energy of adsorption determined in these ways was compared to that deduced on the basis of pC 20 and Lifshitz van der Waalscomponents of the anionic surfactant and alcohol tails.

show abstract

“…Knowing the length of the surfactants calculated by using the Mercury 1.4 programme (21.8 Å and 26.2 Å for C 12 (EDMAB) and BDDAB, respectively) or their thickness (2.7 Å) [18], it is also possible to calculate the total concentration of the surfactant in the monolayer at water-air interface (C s ) [1]:…”

Section: Surfactants Concentration In Surface Layermentioning

confidence: 99%

Surface and volume properties of dodecylethyldimethylammonium bromide and benzyldimethyldodecylammonium bromide

Harkot

Jańczuk

2009

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Surface tension measurements were carried out for aqueous solutions of two cationic surfactants: dodecylethyldimethylammonium bromide (C(12)(EDMAB)) and benzyldimethyldodecylammonium bromide (BDDAB). Isotherms and thermodynamic adsorption parameters were determined from the surface tension data. Firstly, the surface excess concentration in the adsorbed monolayer and the total concentration of the surfactants were determined, then the standard free energy of adsorption was calculated by different methods. In the calculations, different orientations of the surfactants at the adsorbed monolayer were also taken into account. From the experimental and calculated data it results that the difference in the structure of the two cationic surfactants by changing the methyl group for aryl one in their heads causes an increase of the efficiency and a decrease of the effectiveness of adsorption at water-air interface, and that the standard free energy of adsorption can be predicted from the surface tension of the surfactants assuming the aryl group to be equivalent to 3.5 methylene groups. The experimentally obtained difference between the standard free energy of adsorption of the C(12)(EDMAB) and BDDAB was in good agreement with that theoretically accounted, corresponding to the standard free energy of adsorption of the aryl group. However, the best correlation between the values was obtained when a parallel orientation of the surfactant molecules at the adsorbed monolayer was taken into account.

show abstract

Properties of Decylammonium Chloride and Cesium Perfluorooctanoate at Interfaces and Standard Free Energy of Their Adsorption

Cited by 53 publications

References 17 publications

Thermodynamic Investigation of the Micellization and the Adsorption of Short Perfluoroalkylated Diols via Fluorescence Spectroscopy and Tensiometry

Thermodynamic Investigation of the Micellization and the Adsorption of Short Perfluoroalkylated Diols via Fluorescence Spectroscopy and Tensiometry

Behavior of Anionic Surfactants and Short Chain Alcohols Mixtures in the Monolayer at the Water–Air Interface

Surface and volume properties of dodecylethyldimethylammonium bromide and benzyldimethyldodecylammonium bromide

Contact Info

Product

Resources

About