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Cloud Point of Mixed Ionic-Nonionic Surfactant Solutions in the Presence of Inorganic Salts

  • Moussa Alibrahim
Published/Copyright: March 3, 2017
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Tenside Surfactants Detergents
From the journal Tenside Surfactants Detergents Volume 54 Issue 2

Abstract

Effects of various additives including inorganic salts, nonionic and ionic surfactants on the cloud point of the linear nonionic surfactant, Tergitol 15-S-7 were investigated. The cloud point of this surfactant is a function of its concentration, as well as the additive concentration. The cloud points of nonionic surfactant mixtures lay in between the cloud points of individual surfactant. The presence of two ionic surfactants, sodium dodecyl sulfate (SDS) and cetyl trimethyl ammonium bromide (CTAB) in the system leads to a substantial increase in the cloud point of a 1 wt% Tergitol 15-S-7 micellar solution. The inorganic salts (< 0.1 M) decrease the cloud point only slightly. However, when inorganic salts are added to the Tergitol 15-S-7 solution in the presence of SDS or CTAB, the cloud point decreases drastically. For SDS-Tergitol 15-S-7 mixed micellar solutions, the polyvalent cations of the added inorganic salts are more active than the univalent cation, the order of decreasing effect is LaCl3 > MgCl2 > KCl; while for CTAB-Tergitol 15-S-7 mixed micellar solutions, the polyvalent anions of the added inorganic salts are more effective than the univalent anion, the order of decreasing effect is Na3PO4 > Na2SO4 > NaNO3.

Kurzfassung

Es wurden die Effekte von verschiedenen Additiven wie anorganische Salze, nichtionische und ionische Tenside auf den Trübungspunkt des linearen nichtionischen Tensids Tergitol 15-S-7 untersucht. Der Trübungspunkt dieses Tensids ist eine Funktion sowohl seiner Konzentration als auch der Konzentration der Additive. Die Trübungspunkte der Mischungen nichtionischer Tenside lagen zwischen denen der reinen einzelnen Tenside. Die Anwesenheit der zwei ionischen Tenside Natriumdodecylsufat (SDS) und Cetyltrimethylammoniumbromid (CTAB) im System führt zu einem erheblichen Anstieg des Trübungspunkts einer 1 wt%igen mizellaren Tergitol 15-S-7-Lösung. Die anorganischen Salze (< 0.1 M) senken den Trübungspunkt nur geringfügig. Wenn jedoch die anorganischen Salze zu einer Tergitol 15-S-7-Lösung, die SDS oder CTAB enthält, gegeben werden, nimmt der Trübungspunkt deutlich ab. In den mizellaren Mischungen SDS-Tergitol 15-S-7 sind polyvalente Kationen der zugegebenen anorganischen Salze aktiver als die einwertigen Kationen, die folgende Reihenfolge ergibt sich dabei: LaCl3 > MgCl2 > KCl. Für die mizellaren Mischungen CTAB-Tergitol 15-S-7 sind die polyvalenten Anionen der zugegebenen Salze effektiver als die einwertigen Anionen. Die sich hier ergebene Reihenfolge ist Na3PO4 > Na2SO4 > NaNO3.

Key words: Cloud point; Tergitol 15-S-7; ionic surfactants; inorganic salts
Stichwörter: Trübungspunkt; Tergitol 15-S-7; ionische Tenside; anorganische Salze
* Correspondence address, Dr. Moussa Alibrahim, Atomic Energy Commission, Chemistry Department, P.O. Box 6091, Damascus, Syria, E-Mail:

Dr. Moussa Alibrahim is a Research Director at the Syrian Atomic Energy Commission, Department of Chemistry, his Ph.D specialist in the field of Chemistry and molecular physical chemistry (France-Nancy I University, 1988). His thesis was involved on the [SYSTEMES A BASE DE TENSIOACTIFS NONIONIQUES: INFLUENCE DE CO-TENSIOACTIFS IONIQUES ET STRUCTURE DES PHASES MESOMORPHES]. His research interests for the time being are focused on the Physical Chemistry of Surfactants, Solvent Extraction and Liquid Crystal.

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Received: 2015-09-08
Accepted: 2015-10-14
Published Online: 2017-03-03
Published in Print: 2017-03-15

© 2017, Carl Hanser Publisher, Munich

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  5. Novel Surfactants
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  11. Physical Chemistry
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  13. Micellar Parameters of Cationic Surfactant Cetylpyridinium Bromide in Aqueous Solutions of Amino Acids at Different Temperatures: Conductometric, Surface Tension, Volumetric and Viscosity Study
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  15. Surface/Interfacial Tension, Wettability and Foaming Properties of Bi-Component Nonylphenol Alkyl Sulfonates based on Linear Alpha Olefin
  16. Application
  17. Characterization and Surface Active Properties of Aliphatic Glycerol Acetal Disodium Sulfosuccinates
  18. A Comparative Study on the Cloud Point Extraction Behavior of Copper(II) from Sulphate Medium by N,N′-Bis(Salicylidene)Ethylenediamine using Triton X-100 and Tergitol 15-S-7 as Non-ionic Surfactants
https://doi.org/10.3139/113.110484
Keywords for this article
Cloud point; Tergitol 15-S-7; ionic surfactants; inorganic salts

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Review
  4. Origin, Properties, Production and Purification of Microbial Surfactants as Molecules with Immense Commercial Potential
  5. Novel Surfactants
  6. Determination of Surface-Active Characteristics of a Natural Surfactant Extracted from Sapindus Saponaria
  7. Environmental Chemistry
  8. Effect of Contaminated Water with Laundry Detergent on Foxtail Millet Root and Physiological Traits
  9. Washing Technology
  10. Influence of Water Circulation in Household Washing Machines on Cleaning Performance
  11. Physical Chemistry
  12. Approach of Different Properties of Alkylammonium Surfactants using Artificial Intelligence and Response Surface Methodology
  13. Micellar Parameters of Cationic Surfactant Cetylpyridinium Bromide in Aqueous Solutions of Amino Acids at Different Temperatures: Conductometric, Surface Tension, Volumetric and Viscosity Study
  14. Cloud Point of Mixed Ionic-Nonionic Surfactant Solutions in the Presence of Inorganic Salts
  15. Surface/Interfacial Tension, Wettability and Foaming Properties of Bi-Component Nonylphenol Alkyl Sulfonates based on Linear Alpha Olefin
  16. Application
  17. Characterization and Surface Active Properties of Aliphatic Glycerol Acetal Disodium Sulfosuccinates
  18. A Comparative Study on the Cloud Point Extraction Behavior of Copper(II) from Sulphate Medium by N,N′-Bis(Salicylidene)Ethylenediamine using Triton X-100 and Tergitol 15-S-7 as Non-ionic Surfactants
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