Accessible Requires Authentication Published by De Gruyter April 2, 2013

New Vesicle Gels in Household Applications

Neue Vesikelgele in Hauhaltsanwendungen
F. Müller, J. Peggau, J. Meyer and R. Scheuermann

Abstract

Stable dispersions of either gas bubbles or solid particles like abrasives become increasingly attractive for the home care market. The property to yield a stable dispersion is not necessarily linked to a high viscosity in general but requires a highly viscous, solid-like behaviour under rest as well as a liquid-like flow behaviour under shear. A gel comprising such a yield zone can be obtained by creating multi-lamellar vesicles with a rather stiff shell. Due to the repulsion forces of opposite electric charges the combination of suitable anionic and cationic surfactants yields vesicles that are inflexible enough to comprise a yield zone. Surfactants which are appropriate to yield suitable vesicle gels can be chosen according to their spatial dimensions since the geometry of the molecules determines their aggregation behaviour. With this, new formulation possibilities for bathroom cleaners or scouring liquids are available.

Kurzfassung

Für eine Vielzahl von Anwendungen im Home Care Bereich kommen Dispersionen zum Einsatz, die durch rheologische Additive stabilisiert werden müssen. Eine stabile Dispersion bedingt nicht unbedingt eine hohe Viskosität, die hier vorgestellten Systeme zeigen unter Scherung eher ein leicht fließendes Verhalten, jedoch in der Ruhe ein Feststoffverhalten. Ein neuer Weg zu Vesikeln mit relativ starrer Hülle entsteht durch geeignete Kombination von anionischen und kationischen Tensiden. Durch die entgegengesetzten Ladungen bilden sich vergleichsweise steife Schichten, welche die Ausbildung einer Fließgrenze zur Folge haben. Voraussetzung ist eine hinreichend hohe Konzentration an Vesikeln. Für die Formulierung vesikelhaltiger Systeme ist die Zusammensetzung, insbesondere das Verhältnis von anionischen zu kationischen Tensiden, von immanenter Bedeutung, da die geometrische Gestalt der Tensidmoleküle auch die Geometrie der resultierenden Aggregate bestimmt. Mit diesem neuen Konzept sind im Folgenden spezielle Badreiniger und Scheuerreiniger formuliert worden.


Jörg Peggau, Degussa AG Care Specialties Goldschmidtstrasse 100 D-45127 Essen, Germany.

Felix Müller (1964) obtained a Ph.D. in Organic Chemistry from the University of Münster in 1992. After working as a management consultant he joined Th. Goldschmidt AG, Essen, now part of Degussa AG, in 1993. There he started in the applied research department of the Surfactants business unit and currently is the head of the applied technology department of the product line Home Care. His scientific interest is in novel surfactant systems, silicone surfactants, performance additives in home care applications and the Lotus Effect.

Jörg Peggau, born 1962 in Gelsenkirchen. Joining Goldschmidt AG in 1978. Until 1984 research and development for disinfectant raw materials, 1984–1995 development and application techniques for hygiene products with the focus on food industry. Graduation as Chemotechniker in 1987. Since 1995 development and application techniques of raw materials and performance additives for the field of Care Specialities of Degussa – Goldschmidt AG.

Dr. Jürgen Meyer was born in 1971. After studying chemistry at the University of Bayreuth, he did his PhD-thesis in the field of colloid science in the group of Prof. Heinz Hoffmann at the University of Bayreuth. He joined Degussa in 2001 as part of the “Interfacial Chemistry Management” within R&D Care Specialties, supporting application research with interfacial know how. Since 2003he is responsible for the application laboratory Personal Care Leave-On, focussing on the development of new raw materials (e.g. emulsifiers, emollients) and formulation concepts for cosmetic leave-on applications.

Dr. Ralph Scheuermann, born 1972 in Lippstadt. 1993–1998 chemistry studies at TU Clausthal with focus on physical chemistry. Dissertation at TU Clausthal on (Swelling behaviour of selected polymer-solvent-systems during vitrification). Graduation as Dr. rer. nat. in 2002. Joining Goldschmidt GmbH in R&D in 2003. 2003–2006 R&D manager (Formulation Fundamentals) at BU Care Specialties of Degussa AG. Since 2006 research in (Interfacial Technology) at BU Care & Surface Specialties.


References

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Received: 2006-06-08
Published Online: 2013-04-02
Published in Print: 2006-11-01

© 2006, Carl Hanser Publisher, Munich