Startseite Microemulsions Using Hexaethylene Glycol Mono-n-dodecyl Ether Nonionic Surfactant and Small Amount of Ionic Surfactants
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Microemulsions Using Hexaethylene Glycol Mono-n-dodecyl Ether Nonionic Surfactant and Small Amount of Ionic Surfactants

  • M. Alibrahim
Veröffentlicht/Copyright: 31. März 2013
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Tenside Surfactants Detergents
Aus der Zeitschrift Tenside Surfactants Detergents Band 43 Heft 4

Abstract

The influence of small addition of ionic surfactant such as sodium dodecyl sulfate (SDS) and carboxylate ethoxyle (TDC) to nonionic surfactant hexaethylene glycol mono-n-dodecyl ether (C12E6) on the microemulsions formed in the system water/decane/surfactant was studied. An empirical description of the phase behaviour is presented that permits to determine the PIT, and what efficiency of the surfactants to expect. The investigation showed an expected rise in the temperature at which maximum solubility was observed (PIT), and a pronounced extension of the solubility area was also observed. In addition, the temperature stability of these microemulsions was improved. The structural study of the system water/(C12E6+1% TDC) shows that the liquid crystal phase is lamellar at 45°C. It's structural parameters are determined by small angle X-ray scattering. The study of lamellar phase allows the description of the evolution of the surfactant chains conformation.

Kurzfassung

Der Einfluss geringer Zugaben eines ionischen Tensids, wie Natriumdodecylsulfat (SDS) und carboxyliertes Ethoxylat (TDC) zum nichtionisches Tensid Hexaethylenglykolmono-n-dodecylether (C12E6) auf die ausgebildeten Mikroemulsionen im Wasser/Dekan/Wasser-System wurde untersucht. Es wird eine empirische Beschreibung des Phasenverhaltens vorgestellt, die eine Bestimmung der PIT und die zu erwartende Effizienz der Tenside erlaubt. Die Untersuchung zeigte einen zu erwartenden Anstieg der Temperatur, bei der die maximale Löslichkeit beobachtet wird. Eine ausgeprägte Ausdehnung des Löslichkeitsbereich wurde ebenfalls beobachtet. Zusätzlich wurde die Temperaturstabilität dieser Mikroemulsionen verbessert. Die strukturelle Untersuchung des Systems Wasser/(C12E6+1% TDC) zeigt, dass die Flüssigkristallphase bei 45°C lamellar ist. Ihre strukturellen Parameter wurden mittels Roentgenkleinwinkelstreuung bestimmt. Die Untersuchung der lamellaren Phase erlaubt die Beschreibung zur Entwicklung der Tensidkettenkonformation.

Key words:: Microemulsion; nonionic surfactant; ionic surfactant; cloud point; PIT; lamellar liquid crystal
Stichwörter:: Mikroemulsion; ionisches Tensid; Trübungspunkt; PIT; lamellare Flüssigkristalle
∗ Dr. M. Alibrahim, Atomic Energy Commission, Chemistry Departement, P.O. Box: 6091, Damascus, Syria. E-mail:

Moussa Alibrahim was born in 1955 and obtained his B.Sc. in the field of chemistry from Damascus university in 1979 and his Ph.D. in the field of Chemistry and molecular physical chemistry (France-Nancy university I, 1988). In 1980he started working in the Syrian Atomic Energy Commission in chemistry department. He has been awarded to prepare his Ph.D. in France (Nancy university I) from 1982 to 1988, under the supervision of Prof. J. C. Ravey; Prof. C. Tondre; Prof. M. J. Stebe and J. J. Delpuech. His theses presented subject is [SYSTEMES A BASE DE TENSIOACTIFS NONIONIQUES: INFLUENCE DE CO-TENSIOACTIFS IONIQUES ET STRUCTURE DES PHASES MESOMORPHES]. He restarted working in the chemistry department of the Syrian Atomic Energy Commission again from 1989 until now, in the field of Physical Chemistry and Solvent Extraction.

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Received: 2006-03-23
Published Online: 2013-03-31
Published in Print: 2006-09-01

© 2006, Carl Hanser Publisher, Munich

Artikel in diesem Heft

  1. Contents/Inhalt
  2. Contents
  3. Abstracts
  4. Abstracts
  5. Analysis
  6. Analysis of the Sucrose Fatty Acid Esters by Atmospheric-pressure Ionization MS with Electrospray Ionization Spectrometry
  7. Application
  8. Influence of Natural and Synthetic Additives on Calcium Carbonate Precipitation and Crystal Morphology
  9. Physical Chemistry
  10. Effect of Micelles on the Dynamic Surface Tension of Zwitterionic Surfactants
  11. Microemulsions Using Hexaethylene Glycol Mono-n-dodecyl Ether Nonionic Surfactant and Small Amount of Ionic Surfactants
  12. Synthesis
  13. Synthesis and Properties of Sugar-Based Gemini Surfactants
  14. Synthesis and Properties of Al-δ Layered Sodium Disilicate with High Framework Stability
https://doi.org/10.3139/113.100308
Schlagwörter für diesen Artikel
Microemulsion; nonionic surfactant; ionic surfactant; cloud point; PIT; lamellar liquid crystal

Artikel in diesem Heft

  1. Contents/Inhalt
  2. Contents
  3. Abstracts
  4. Abstracts
  5. Analysis
  6. Analysis of the Sucrose Fatty Acid Esters by Atmospheric-pressure Ionization MS with Electrospray Ionization Spectrometry
  7. Application
  8. Influence of Natural and Synthetic Additives on Calcium Carbonate Precipitation and Crystal Morphology
  9. Physical Chemistry
  10. Effect of Micelles on the Dynamic Surface Tension of Zwitterionic Surfactants
  11. Microemulsions Using Hexaethylene Glycol Mono-n-dodecyl Ether Nonionic Surfactant and Small Amount of Ionic Surfactants
  12. Synthesis
  13. Synthesis and Properties of Sugar-Based Gemini Surfactants
  14. Synthesis and Properties of Al-δ Layered Sodium Disilicate with High Framework Stability
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