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Self-Organized Nano-Particles for Enhanced Wetting of Hard Surfaces∗∗

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Published/Copyright: May 5, 2013
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Abstract

Nano-particles or nanometer-thin layers are well established for permanent modification of hard surfaces. Depending on the physical and chemical properties, such films can lead to anti-scratch, anti-reflective and “self-cleaning” properties. The use of nano-particles and nanometer-thin polymeric films is also of interest for temporary applications. In this work it is shown that application of particle dispersions or polymers on hard ceramic surfaces can lead to distinct self-organization of the nano-particles due to electrostatic repulsion and surface free energy minimization. Some of the resulting semi-permanent surface modifications show reduced contact angles for hydrophilic liquids, which results in long-lasting effects of enhanced drainage, increased drying speed and reduced re-soiling. The self-organization of hydrophilic nano-sized particles with different size and surface characteristics is evaluated compared to polymeric surface modifiers.

Kurzfassung

Nanopartikel und Nanometer-dünne Beschichtungen werden bereits erfolgreich zur dauerhaften Modifizierung harter Oberflächen eingesetzt. Abhängig von den physikalischen und chemischen Partikeleigenschaften lassen sich auf diese Weise kratzfeste, anti-reflektive und „selbstreinigende“ Oberflächen verwirklichen. Nanopartikel und Nanometer-dünne Polymerschichten sind aber auch von Interesse für temporäre Applikationen. In dieser Arbeit wird gezeigt, dass die Behandlung keramischer Oberflächen mit Partikeldispersionen und Polymeren aufgrund elektrostatischer Abstoßung und Minimierung der freien Oberflächenenergie zu unterschiedlichen Arten von Selbstorganisation führen kann. Einige der resultierenden Oberflächen zeigen langanhaltend niedrige Kontaktwinkel gegenüber hydrophilen Flüssigkeiten, was während und nach der Reinigungsanwendung zum schnelleren Trocknen und zu verringerter Wiederanschmutzung beitragen kann. Die Wirkung von Nanopartikeln mit verschiedenen Oberflächeneigenschaften wird der polymerer Additive gegenübergestellt.


Correspondence to Dr. Michael Dreja Henkel KGaA R&D/Technology Home Care Henkelstrasse 67 D-40191 Düsseldorf Germany E-mail:
∗∗

This paper is part of a presentation given at the 18. Vortragstagung der GDCh-Fachgruppe, „Waschmittelchemie“, 29.–30. April 2004, Königswinter, Germany

Dr. Michael Dreja (born in 1970) studied chemistry at the University of Cologne from 1990 to 1995. His first-degree thesis on the rheology of gelatin dispersions was carried out at Agfa-Gevaert AG, Leverkusen. In 1998, he obtained his PhD in physical chemistry from the University of Cologne with a thesis on polymerization in microemulsions. After postdoctoral research at the University of Washington, Seattle, he joined Henkel in 1999. He spent 3 years in the corporate research department working on colloids and interfaces. In 2002, he took over a position in product development, where he now is responsible for the international R&D of all purpose, glass and speciality cleaners.

Jürgen Noglich (born in 1952) is a senior research technician in the international R&D hard surface cleaners at Henkel, Düsseldorf, Germany. He joined Henkel in 1970 and has since then worked in nearly all areas of hard surface cleaner product development. His current focus is the performance characterization and improvement of glass cleaner formulations.

Dr. Jaume Josa (born in 1956) graduated with a PhD in organic chemistry from University of Barcelona in 1989. He started his professional career in Kao Corporation in 1988. After joining Henkel Iberica in 1991, he worked in several different areas in the product development, focussing on bleach products and floor care. In 1998, he spent 1 year with The Clorox Company in Oakland, California. Since 2001, he leads the international R&D hard surface cleaners at the Henkel headquarter in Düsseldorf, Germany.


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Received: 2004-7-12
Published Online: 2013-05-05
Published in Print: 2004-09-01

© 2004, Carl Hanser Publisher, Munich

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