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Dynamic Properties of Surfactants: Influence on Processes and Technologies

  • G. Oetter , R. Nörenberg und S. Hess
Veröffentlicht/Copyright: 8. Mai 2013
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Tenside Surfactants Detergents
Aus der Zeitschrift Tenside Surfactants Detergents Band 42 Heft 3

Abstract

Industrial processes become faster and faster. The corresponding formulations have to keep pace with new technical solutions like spray coating in paper production or the substitution of isopropanol in fountain solutions for offset printing. Fast diffusion of amphiphiles to interfaces and the formation of interfacial films to lower the interfacial energy are the fundamental molecular mechanisms which have to be optimised for all high speed spraying and wetting processes. Our results show that the interfacial tension at water/air and at water/solid interfaces primarily depends on the concentration of free surfactants. Micelles act as depots for free surfactants which adjust the concentration in solution as soon as surfactants disappear by interface adsorption. By using synergistic mixtures it is possible to extend the application range of dynamic surfactants towards detergency by combining fast adsorption at interfaces with micellar properties.

Kurzfassung

Industrielle Prozesse werden immer schneller. Neue technische Entwicklungen wie die Sprühbeschichtung in der Papierproduktion oder Isopropanol-freie Feuchtmittel für das Offset-Drucken stellen hohe Herausforderungen an die Dynamik entsprechender Formulierungen. Die Diffusion von amphiphilen Molekülen an die Grenzfläche und die Erniedrigung der Grenzflächenenergie durch Bildung von Grenzflächenfilmen sind die molekularen Mechanismen, die für alle schnellen Sprüh- und Benetzungsprozesse optimiert werden müssen. Unsere Ergebnisse zeigen, dass die Grenzflächenspannung an Wasser/Luft- und Wasser/Festkörper-Grenzflächen hauptsächlich von der Konzentration der monomeren Tenside abhängt. Mizellen dienen als Depots für freie Tenside und sorgen für eine Anpassung der Konzentration, sobald die Lösung an Monomeren durch Grenzflächenadsorption verarmt. Mit synergistischen Mischungen ist es möglich, schnelle Grenzflächenadsorption mit mizellaren Eigenschaften zu kombinieren und damit das Einsatzgebiet dynamischer Tenside auf Wasch- und Reinigungsanwendungen auszudehnen.

Keywords:: surfactants; surface tension; interfacial tension; contact angle; synergistic mixture
Schlüsselwörter: Tenside; Oberflächenspannung; Grenzflächenspannung; Kontaktwinkel; synergistische Mischungen
1Dr. Günter Oetter, BASF Aktiengesellschaft Specialty Chemicals Research GVC / F – J 550 67056 Ludwigshafen, Germany Telefon: +49 621 60–5 47 78 Telefax: +49 621 60–9 72 33 E-mail:

Presented at the 6th World Surfactant Congress CESIO 2004, Berlin 20–23 June 2004

Günter Oetter, born in 1960, studied chemistry at the university of Bayreuth, where he obtained his Ph.D. in 1989 for work on surfactant aggregation and solubilisation in highly concentrated systems. In the same year he joined BASF AG in Ludwigshafen, currently working on colloid science and formulation development in the central research of BASF AG.

Ralf Nörenberg, born in 1969, studied chemistry at the universities of Darmstadt and Göttingen. In 1996, he obtained his Ph.D. for work on dynamic and structural aspects of photoinduced unimolecular reactions done at MPI for biophysical Chemistry in Göttingen. In 1997, he joined BASF AG, in the physics laboratory working on discovering principles-of-action of the application of performance chemicals. In 2000, he joined the group for technical marketing of surfactants. Since 2003, he is responsible for the development group for performance chemicals for textile auxiliaries.

Stephan Hess, born in 1974, studied chemistry at Freiburg, the Massachussetts Institute of Technology and Göttingen. In 2002 he obtained his Ph.D. from the Technische Universität München for work on photoinduced charge transfer processes in DNA. From 2002 to 2003, he carried out postdoctoral work at Stanford University in the field of single-molecule spectroscopy. He joined the “Physical Chemistry & Informatics” Department in the central research of BASF AG, Ludwigshafen, in 2003. His current work focusses on colloid science and formulation development.

References

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Received: 2005-1-27
Published Online: 2013-05-08
Published in Print: 2005-06-01

© 2005, Carl Hanser Publisher, Munich

Artikel in diesem Heft

  1. Contents/Inhalt
  2. Contents
  3. Abstracts
  4. Abstracts
  5. Review Article
  6. Pulmonary Surfactant and its in vitro Assessment Using Axisymmetric Drop Shape Analysis (ADSA): A Review
  7. Application
  8. Cleanability of Plastic Flooring Materials Related to their Surface Properties
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  10. New Hydroxylated Cationic Gemini Surfactants as Effective Corrosion Inhibitors for Mild Steel in Hydrochloric Acid Medium
  11. Physical Chemistry
  12. Dynamic Properties of Surfactants: Influence on Processes and Technologies
  13. Effect of Alcohols on the cmc and Micelle Ionization Degree of Alkanediyl-α,ω-bis(Dimethyldodecylammonium Bromide) Surfactants
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https://doi.org/10.3139/113.100251
Schlagwörter für diesen Artikel
surfactants; surface tension; interfacial tension; contact angle; synergistic mixture

Artikel in diesem Heft

  1. Contents/Inhalt
  2. Contents
  3. Abstracts
  4. Abstracts
  5. Review Article
  6. Pulmonary Surfactant and its in vitro Assessment Using Axisymmetric Drop Shape Analysis (ADSA): A Review
  7. Application
  8. Cleanability of Plastic Flooring Materials Related to their Surface Properties
  9. Soiling Tendency of Worn, Plastic Flooring Materials Related to their Surface Topography
  10. New Hydroxylated Cationic Gemini Surfactants as Effective Corrosion Inhibitors for Mild Steel in Hydrochloric Acid Medium
  11. Physical Chemistry
  12. Dynamic Properties of Surfactants: Influence on Processes and Technologies
  13. Effect of Alcohols on the cmc and Micelle Ionization Degree of Alkanediyl-α,ω-bis(Dimethyldodecylammonium Bromide) Surfactants
  14. Molecular Dynamics
  15. The Self-Assembly of an Amphiphilic Block Copolymer: A Dissipative Particle Dynamics Study
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