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Microemulsions with Mixed Nonionic Surfactants and Isopropylmyristate

  • M. Fanun
Veröffentlicht/Copyright: 5. April 2013
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Tenside Surfactants Detergents
Aus der Zeitschrift Tenside Surfactants Detergents Band 47 Heft 5

Abstract

Water/propylene glycol/sucrose laurate/ethoxylated mono-di-glyceride/isopropylmyristate microemulsion systems were formulated and investigated using electrical conductivity and small angle X-ray scattering. The solubilization capacity of water in oil is dependent on the surfactants mixing ratio (w/w). The free energy of solubilization (ΔGos) values for water-in-oil microemulsions were calculated and found to decrease with water content in the water-in-oil microemulsions, they decreased with increasing ethoxylated mono-di-glyceride content in the mixed surfactants. The activation energy of conductive flow was estimated and a percolation phenomenon was revealed in these systems. Small angle X-ray scattering results indicate that the periodicity increases linearly with the increase in the water volume fraction in these microemulsions. The correlation length increases with the increase in the water volume fraction to a certain value then decreases.

Kurzfassung

Mikroemulsionen aus Wasser, Propylenglykol, Sucroselaurat, ethoxilierte Mono-diglyceride und Isopropylmyristat wurden hergestellt. An diesen Systemen wurden Messungen der elektrischen Leitfähigkeit und der Kleinwinkelröntgenstreuung durchgeführt. Das Lösevermögen von Wasser in Öl ist abhängig vom Tensidmischungsverhältnis (w/w). Die freie Löseenergie (ΔGos) der Wasser-in-Öl-Mikroemulsionen wurde berechnet. Die Ergebnisse zeigen, dass die ΔGos-Werte mit dem Wassergehalt in den Wasser-in-Öl-Mikroemulsionen und ebenfalls mit steigendem Gehalt an ethoxylierten Mono-diglyceriden in der Tensidmischung abnehmen. Die Aktivierungsenergie für den Ladungsfluss wurde abgeschätzt und ein Perkolationsphänomen in dem System entdeckt. Die Messergebnisse der Kleinwinkelröntgenstreuung zeigen, dass die Periodizität linear mit dem Volumenbruch des Wassers in der Mikroemulsion ansteigt. Auch die Korrelationslänge steigt zunächst mit dem Volumenbruch des Wassers bis zu einem bestimmten Wert an, nimmt dann aber ab.

Key words:: Surfactants mixing ratio; activation energy of conductive flow; scattering intensity; periodicity; correlation length
Stichwörter:: Tensidmischungsverhältnis; Aktivierungsenergie für den Ladungsfluss; Streuintensität; Periodizität; Korrelationslänge
∗ Dr. Monzer Fanun, Colloids and Surfaces Research Laboratory, Faculty of Science and Technology, Al-Quds University, East-Jerusalem, Palestine, Tel.: +97022799753, Fax: +97022796960. E-Mail: ,

Dr. Monzer Fanun was born in November 1966, he is a professor and head of the colloids and surfaces research laboratory at Al-Quds University, East Jerusalem, Palestine. In 2003, he received his PhD in applied chemistry from the Casali Institute of Applied Chemistry a part of the Institute of Chemistry at the Hebrew University of Jerusalem, Israel. His research focuses on colloidal systems for health care products, surfactant-based alternatives to organic solvents.

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Received: 2010-03-24
Published Online: 2013-04-05
Published in Print: 2010-09-01

© 2010, Carl Hanser Publisher, Munich

Artikel in diesem Heft

  1. Contents/Inhalt
  2. Contents
  3. Abstracts
  4. Abstracts
  5. Environmental/Technical Chemistry
  6. Alkyl Polyglycoside-Sorbitan Ester Formulations for Improved Oil Recovery
  7. Novel Surfactants
  8. Photosynthesis-inhibiting Effects of Cationic Biodegradable Gemini Surfactants
  9. Synthesis and Characterization of a New Cationic Galactolipid with Carbamate for Gene Delivery
  10. Physical Chemistry
  11. Dynamics of Formation of Vesicles Studied by Highly Time-resolved Stopped-flow Experiments
  12. Ion Extractant as Cosurfactant at the Water-Oil Interface in Microemulsions
  13. Microemulsions with Mixed Nonionic Surfactants and Isopropylmyristate
  14. Micellization and Interfacial Behaviour of Amitriptyline-Nonionic Surfactant Systems in Aqueous Medium
  15. Synthesis
  16. Ordered Ferrocene-containing Mesoporous Materials with Tailor-made Pore Size
  17. Cleaning Technology
  18. Comparison of Standards for Testing Electrical Dishwashers or Dishwashing Detergents
  19. Manual Dishwashing – How can it be Optimized?
https://doi.org/10.3139/113.110083
Schlagwörter für diesen Artikel
Surfactants mixing ratio; activation energy of conductive flow; scattering intensity; periodicity; correlation length

Artikel in diesem Heft

  1. Contents/Inhalt
  2. Contents
  3. Abstracts
  4. Abstracts
  5. Environmental/Technical Chemistry
  6. Alkyl Polyglycoside-Sorbitan Ester Formulations for Improved Oil Recovery
  7. Novel Surfactants
  8. Photosynthesis-inhibiting Effects of Cationic Biodegradable Gemini Surfactants
  9. Synthesis and Characterization of a New Cationic Galactolipid with Carbamate for Gene Delivery
  10. Physical Chemistry
  11. Dynamics of Formation of Vesicles Studied by Highly Time-resolved Stopped-flow Experiments
  12. Ion Extractant as Cosurfactant at the Water-Oil Interface in Microemulsions
  13. Microemulsions with Mixed Nonionic Surfactants and Isopropylmyristate
  14. Micellization and Interfacial Behaviour of Amitriptyline-Nonionic Surfactant Systems in Aqueous Medium
  15. Synthesis
  16. Ordered Ferrocene-containing Mesoporous Materials with Tailor-made Pore Size
  17. Cleaning Technology
  18. Comparison of Standards for Testing Electrical Dishwashers or Dishwashing Detergents
  19. Manual Dishwashing – How can it be Optimized?
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