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  • Nichtionische Tenside  (1)
  • ternary systems  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 264 (1986), S. 936-942 
    ISSN: 1435-1536
    Keywords: Microemulsions ; phase behavior ; polar polymers ; ternary systems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper reports on studies of the phase behavior of systems of the type H2O-oil-amphiphilue-electrolyte with a simple polar polymer as nonionic amphiphile. It turns out that the system behaves similar to systems with monomeric nonionic amphiphiles which is due to the fact that both the binary system H2O-polar polymer and oil-polar polymer show the same characteristic features as the corresponding systems with monomeric amphiphiles. The results suggest the tailoring of polydetergents by varying both their amphiphilicity and their degree of polymerization in order to obtain highly efficient amphiphiles for the preparation of socalled microemulsions.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 261 (1983), S. 954-964 
    ISSN: 1435-1536
    Keywords: Mikroemulsionen ; Nichtionische Tenside ; Phasendiagramme ; Phaseninversion ; Ternäre Systeme
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Abstract This paper deals with the change of the phase diagram of ternary systems of the type H2O-oil-nonionic surfactant with temperature, in particular, with the question regarding the reasons for the separation of such mixtures into three phases. It is shown that the phase behavior is mainly determined by the interplay between the lower miscibility gap between oil and surfactant with the upper miscibility gap between H2O and surfactant. From systematic investigations with dodecane, octane, cyclohexane and toluene as oils with „simple“ alkylpolyethyleneglycolethers CiEj as surfactants, ten qualitative rules are derived concerning the dependence of the position and the width of the three-phase temperature interval on the hydrophobicity of the oil and the amphiphilicity of the surfactant. The rules permit the choice of the appropriate surfactant for application in chemical engineering. Finally, the phase behavior with mixtures of oils and mixtures of surfactants, resp., is studied.
    Notes: Zusammenfassung Die Arbeit behandelt die Veränderung des Phasendiagramms ternärer Systeme des Typs H2O-Öl-Nichtionisches Tensid mit der Temperatur, insbesondere die Frage nach den Ursachen für den Zerfall solcher Mischungen in drei Phasen. Es wird gezeigt, daß das Phasenverhalten im wesentlichen durch das Zusammenspiel zwischen der unteren Mischungslücke zwischen Öl und Tensid mit der oberen Mischungslücke zwischen H2O und Tensid bestimmt wird. Aus systematischen Untersuchungen mit Dodekan, Oktan, Cyclohexan und Toluol als Ölen und „einfachen“ Alkylpolyäthylenglykoläthern CiEj als Tensiden werden zehn qualitative Regeln über die Abhängigkeit der Lage und Breite des Temperaturintervalls des Dreiphasengebietes von der Hydrophobie des Öls und der Amphiphilität des Tensids hergeleitet. Die Regeln erleichtern die Auswahl des geeigneten Tensids für verfahrenstechnische Anwendungen. Schließlich wird das Phasenverhalten mit Ölmischungen bzw. Tensidmischungen behandelt.
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