Spectrophotometric studies on surfactants. I. Interactions between cationic and anionic surfactants

1967 ◽  
Vol 45 (22) ◽  
pp. 2821-2827 ◽  
Author(s):  
R. V. Scowen ◽  
J. Leja
Keyword(s):  
Aqueous Solutions ◽  
Cationic Surfactants ◽  
Mixed Micelles ◽  
Anionic Surfactants ◽  
Ultraviolet Spectra ◽  
Dodecyl Sulfate ◽  
Cationic And Anionic Surfactants

Interactions taking place in aqueous solutions when cationic surfactants, alkyl trimethyl ammonium bromides (CnTABs, dodecyl or octadecyl), are added to solutions of anionic surfactants, like alkyl dithiocarbonates (xanthates, hexyl or nonyl) and dodecyl sulfate or laurate ions, result either in the formation of 1:1 complexes or in mixed micelles. Infrared and ultraviolet spectra show that complexes are largely ionic, with some perturbations of bonds in anions and a limited hydrolysis in the case of laurate ions.

Temperature-Dependent Vesicle Formation of Aqueous Solutions of Mixed Cationic and Anionic Surfactants

Langmuir ◽  
2004 ◽  
Vol 20 (6) ◽  
pp. 2117-2122 ◽  
Author(s):  
Koji Tsuchiya ◽  
Hisanori Nakanishi ◽  
Hideki Sakai ◽  
Masahiko Abe
Keyword(s):  
Aqueous Solutions ◽  
Anionic Surfactants ◽  
Vesicle Formation ◽  
Temperature Dependent ◽  
Cationic And Anionic Surfactants

scholarly journals FLUORESCENCE CHARACTERISTICS OF RHODAMINE 6G AND RHODAMINE C IN WATER-MICELLAR SURFACTANT ENVIRONMENTS

2019 ◽  
Vol 85 (12) ◽  
pp. 84-95
Author(s):  
Olga Zaporozhets ◽  
Sergey Kulichenko ◽  
Sergey Lelyushok ◽  
Viktoriia Klovak
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Aqueous Solutions ◽  
Fluorescence Intensity ◽  
Cationic Surfactants ◽  
Rhodamine 6G ◽  
Sodium Dodecyl ◽  
Hydrocarbon Radical ◽  
Fluorescence Characteristics ◽  
Dodecyl Sulfate ◽  
Triton X

The influence of cationic, anionic, nonionic surfactants and their mixtures on the fluorescence characteristics of rhodamine 6G and Rho-damine C solutions has been investigated. The fluorescence intensity of aqueous solutions of rhodamine 6G and in the presence of cetylpyridinium chloride and sodium dodecyl sulfate has almost unchanged throughout the pH range. The fluorescence intensity of aqueous and water-micellar rhodamine C solutions has been increased in the pH 1-4 range; the signal has been remained unchanged at high pH values. The studies have been carried out at pH 4 for rhodamine 6G and at pH 10 for rhodamine C. The fluorescence characteristics of water-micellar dye - surfactant - non-ionic surfactant systems have been performed at a concentration of Triton X-100 of 3.4·10‑2 mol/l. The interaction with cationic surfactants has shown differences character between the I=f(n) dependences for aqueous solutions of highly hydrophobic rhodamine 6G and more hydrophilic rhodamine C. The study of the effect of the hydrocarbon radical length on the intensity of the fluorescence of rhodamine 6G and rhodamine C has been carried out at two concentrations of cationic surfactants: under the condition of the formation of stoichiometric associates dye with cationic surfactant and in the region of the micellar concentrations of cationic surfactants. The character of the influence of the length of the hydrocarbon radical cationic surfactants on the fluorescence intensity of the dyes can be explained by the increasing role of hydrophobic interactions and the enhancement of solubilization in systems involving long-chain surfactants. The difference in the nature of the associates of rhodamine 6G and rhodamine C with hydrophobic and moderately hydrophobic cationic surfactants has been counterbalanced in the presence of Triton X-100. Reduction of fluorescence intensity of rhodamine 6G in domicile solutions of anionic sodium dodecyl sulfate has been established. The method of fluorescence detection of sodium dodecyl sulfate in reaction with rhodamine 6G has been proposed. The method has been tested in determining of anionic surfactants in the waters after washing clothes.

Formation of Mixed Micelles in Salt-Free Aqueous Solutions of Sodium Dodecyl Sulfate and C12E6

Langmuir ◽  
2003 ◽  
Vol 19 (18) ◽  
pp. 7214-7218 ◽  
Author(s):  
Vasil M. Garamus
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Aqueous Solutions ◽  
Mixed Micelles ◽  
Sodium Dodecyl ◽  
Dodecyl Sulfate

Phase behavior in mixtures of cationic and anionic surfactants in aqueous solutions

1995 ◽  
Vol 273 (2) ◽  
pp. 182-188 ◽  
Author(s):  
N. Filipović-Vinceković ◽  
M. Bujan ◽  
Đ. Dragčević ◽  
N. Nekić
Keyword(s):  
Aqueous Solutions ◽  
Phase Behavior ◽  
Anionic Surfactants ◽  
Cationic And Anionic Surfactants

Test methods for determining cationic and anionic surfactants in disinfecting and technological solutions

2021 ◽  
Vol 87 (2) ◽  
pp. 13-18
Author(s):  
Z.A. C. Shogah ◽  
V. G. Amelin ◽  
D. S. Bolshakov
Keyword(s):  
Quantitative Determination ◽  
Polymer Film ◽  
Cationic Surfactants ◽  
Anionic Surfactants ◽  
Cetylpyridinium Chloride ◽  
Test Strip ◽  
Bromphenol Blue ◽  
Test Strips ◽  
Cationic And Anionic Surfactants

The purpose of the work was to develop Express methods for determining cationic and anionic surfactants in disinfectants and process solutions. The surfactant concentration was determined visually and colorimetrically by the intensity of color of the indicator zones of paper test strips or by the length of the colored (discolored) zones of test strips laminated in a polymer film. Semi-quantitative determination of surfactants in solutions was carried out by the intensity of color of the zones of indicator test strips pasted on the substrate (test titration on paper). Bromphenol blue was used as an indicator. The titrant was sodium dodecyl sulfate for cationic surfactants and cetylpyridinium chloride for anionic surfactants. Test strips were used for the determination of surfactants in the disinfectant solutions. The concentration in the range of 0.1 – 1.2% was determined by comparing the color with the standard color scale. The duration of the analysis was 3 – 5 min. Quantitative determination of surfactants was carried out by the length of the colored (discolored) zones of test strips glued in a polymer film. As an indicator for cationic surfactants, bromphenol blue (blue zone on the test strip) was used, and for anionic surfactants, an associate of bromphenol blue with cetylpyridinium chloride (discolored zone on the test strip). The determination range of the surfactant made up 16 – 1000 mg/liter. The concentration was determined according to a calibration graph representing the dependence of the length of the blue/discolored zone of the test strips on the concentration of surfactants in the solution. The relative standard deviation of the analysis results does not exceed 0.3; the analysis duration was 20 – 30 min.

Comicellization of Polystyrene-block-Poly(ethylene oxide) with Cationic and Anionic Surfactants in Aqueous Solutions:  Indications and Limits

2001 ◽  
Vol 105 (38) ◽  
pp. 9077-9082 ◽  
Author(s):  
Lyudmila M. Bronstein ◽  
Dmitrii M. Chernyshov ◽  
Evgenii Vorontsov ◽  
Galina I. Timofeeva ◽  
Lydia V. Dubrovina ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Aqueous Solutions ◽  
Anionic Surfactants ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Cationic And Anionic Surfactants

Phase behavior of cationic and anionic surfactants at low concentrations

1992 ◽  
Vol 50 (1) ◽  
pp. 694-695
Author(s):  
E. Naranjo
Keyword(s):  
Phase Behavior ◽  
Structural Characterization ◽  
Dynamic Systems ◽  
Anionic Surfactants ◽  
Intermolecular Forces ◽  
Stable Form ◽  
Surfactant Mixtures ◽  
Low Concentrations ◽  
Cationic And Anionic Surfactants ◽  
General Method

Equilibrium vesicles, those which are the stable form of aggregation and form spontaneously on mixing surfactant with water, have never been demonstrated in single component bilayers and only rarely in lipid or surfactant mixtures. Designing a simple and general method for producing spontaneous and stable vesicles depends on a better understanding of the thermodynamics of aggregation, the interplay of intermolecular forces in surfactants, and an efficient way of doing structural characterization in dynamic systems.

Molecular dynamics study of solubilization of cyclohexane, benzene, and phenol into mixed micelles composed of sodium dodecyl sulfate and octaethylene glycol monododecyl ether

2019 ◽  
Vol 40 (31) ◽  
pp. 2722-2729 ◽  
Author(s):  
Kosuke Takeda ◽  
Kazushi Fujimoto ◽  
Noriyuki Yoshii ◽  
Susumu Okazaki
Keyword(s):  
Molecular Dynamics ◽  
Sodium Dodecyl Sulfate ◽  
Mixed Micelles ◽  
Sodium Dodecyl ◽  
Dodecyl Sulfate
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