Please use this identifier to cite or link to this item: doi:10.22028/D291-24704
Title: Antimicrobic low surface-free energy nanocomposite coatings
Author(s): Becker-Willinger, Carsten
Csögör, Zsuzsa
Gerwann, Jochen
Schmidt, Helmut K.
Language: English
Year of Publication: 2002
OPUS Source: Hygienic coatings : Brussels, Belgium, 8 - 9 July 2002 ; conference papers / [The First Global Conference Dedicated to Hygienic Coatings. The International Centre for Coatings Technology, Paint Research Association]. - Teddington, Middlesex : Paint Research Association, 2002, Paper 7
SWD key words: Nanopartikel
Organisch-anorganischer Hybridwerkstoff
DDC notations: 620 Engineering and machine engineering
Publikation type: Conference Paper
Abstract: A new type of silver nanoparticles containing coating based on inorganic-organic hybrid materials has been developed by the sol-gel technique to achieve antimicrobic properties. The formation of an inactive biofilm layer, which can block the antimicrobic effect, was reduced by decreasing the surface-free energy of the coating. Ag+ ions as effective oligodynamic components are generated by Ag nanoparticles with a size between 5-10nm. The Ag nanoparticles are produced during the drying and curing process. The investigation of the long-time release behavior of Ag+ ions show that the coating has oligodynamic properties for at least several month. The antimicrobic effect of the coating has been proved by inoculation with Gram negative bacterium E.coli. A low surface-free energy of about 19,5mN/m could be achieved by using side chain perfluorinated organo alkoxy silanes, which upconcentrate at the coating surface by thermodynamical reasons. Compared with uncoated samples the low surface-free energy of the coating lead to a reduction of biofilm adhesion of about 95%.
Link to this record: urn:nbn:de:bsz:291-scidok-30281
ISBN: 0-9543164-0-1
Date of registration: 11-Nov-2010
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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