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  • Articles  (2)
  • Ternary aqueous micellar system  (1)
  • alcohol-water mixture  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Role of alcohol in microemulsions as determined from volume and heat capacity data for the water-sodium dodecylsulfate -n-butanol system at 25°C (1982)
    Springer
    Journal of solution chemistry 11 (1982), S. 357-375 
    Details
    ISSN: 1572-8927
    Keywords: Ternary aqueous micellar system ; ionic surfactant ; sodium dodecylsulfate ; n-butanol ; density ; apparent molar volumes ; volumetric and apparent molar heat capacities ; mixed micelles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Densities and heat capacities of the ternary system water-sodium dodecylsulfate — n-butanol were measured at 25°C over the complete alcohol mole-fraction or solubility range. Apparent and partial molar volumes and heat capacities of n-butanol were derived and have been analyzed as a function of the concentration of both the surfactant and the alcohol. Characteristic changes suggest that, at low concentrations, n-butanol is partially solubilized in mixed micelles but, in concentrated alcohol solutions, n-butanol largely exists in the form of microaggregates stabilized by the surfactant. Results would also suggest that at low concentrations of n-butanol another transition zone occurs in the micellar structure around 0.2–0.3 mol-kg−1 in sodium dodecylsulfate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00649294
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  • 2
    Electronic Resource
    Electronic Resource
    Chemical equilibrium model for the thermodynamic properties of mixed aqueous micellar systems: Application to thermodynamic functions of transfer (1984)
    Springer
    Journal of solution chemistry 13 (1984), S. 1-25 
    Details
    ISSN: 1572-8927
    Keywords: Mixed micelles ; surfactant ; alcohol-water mixture ; solubilization ; thermodynamic function of transfer ; volume ; enthalpy ; hydrophobic solutes ; heat capacity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Mixed micelles can be formed in water between various pairs of hydrophobic solutes such as surfactants, alcohols and hydrocarbons. These systems can often be studied through the thermodynamic functions of transfer of one of the solutes, usually kept near infinite dilution, from water to an aqueous solution of the other solute. When mixed micelles are formed, these functions change significantly, and often go through extrema, in the region where the binary system micellizes or undergoes some microphase transition.Three main effects are responsible for the observed trends: pair-wise interactions between both solutes in the monomeric form, a distribution of the reference solute between the aqueous and micellar phases and a shift in the monomer-micelle equilibrium in the vicinity of the reference solute. Simple equations can be derived for these three effects which can account for the sign and magnitude of the observed trends using parameters which are derived for the most part from the two binary systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00648588
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    Paper (German National Licenses)
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