Self-Organized Nano-Particles for Enhanced Wetting of Hard Surfaces∗∗
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, and
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.
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© 2004, Carl Hanser Publisher, Munich
Articles in the same Issue
- Contents/Inhalt
- Contents
- Abstracts
- Abstracts
- Application
- A Protocol to Examine the Colour Damage Profile of Bleach Containing Detergents
- Testing of the Fabric Damage Properties of Bleach Containing Detergents
- Process Management Based on Analysis of Surfactant Properties
- GDCH Special Group Meeting
- Comparison between Interaction Forces at Air/Liquid and Solid/Liquid Interfaces in the Presence of Non-Ionic Surfactants
- Self-Organized Nano-Particles for Enhanced Wetting of Hard Surfaces∗∗
- Environmental Care and Consumer Protection – Example for the Official Survey of Laundry Detergents and Cleansing Agents
- Physical Chemistry
- Microemulsions Formed by a Catanionic Surfactant or by an Ionic Surfactant with an Organic Counterion
Articles in the same Issue
- Contents/Inhalt
- Contents
- Abstracts
- Abstracts
- Application
- A Protocol to Examine the Colour Damage Profile of Bleach Containing Detergents
- Testing of the Fabric Damage Properties of Bleach Containing Detergents
- Process Management Based on Analysis of Surfactant Properties
- GDCH Special Group Meeting
- Comparison between Interaction Forces at Air/Liquid and Solid/Liquid Interfaces in the Presence of Non-Ionic Surfactants
- Self-Organized Nano-Particles for Enhanced Wetting of Hard Surfaces∗∗
- Environmental Care and Consumer Protection – Example for the Official Survey of Laundry Detergents and Cleansing Agents
- Physical Chemistry
- Microemulsions Formed by a Catanionic Surfactant or by an Ionic Surfactant with an Organic Counterion