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Generation of stable coatings with carboxylic groups by copolymerization of MAA and VTMS using DBD at atmospheric pressure

: Thomas, M.; Hausen, M. von; Klages, C.-P.; Baumhof, P.


Cavaleiro, A.:
Plasma surface engineering, PSE 2006 : Proceedings of the Tenth International Conference on Plasma Surface Engineering; Garmisch-Partenkirchen, Germany, September 10-15, 2006
Weinheim: Wiley-VCH, 2007 (Plasma processes and polymers 4.2007, Nr.S1)
ISBN: 978-3-527-32016-5
International Conference on Plasma Surface Engineering (PSE) <10, 2006, Garmisch-Partenkirchen>
Conference Paper, Journal Article
Fraunhofer IST ()
AC barrier discharge; copolymerization; FT-IR; PCR; PECVD

The present paper reports on a new approach for the DBD-based plasma-enhanced chemical vapor deposition of MAA coatings at atmospheric pressure, using a plasma-copolymerization with VTMS in order to render the deposits water-stable. The aim of this work is the optimization of the conditions for generating a highly stable surface with a maximum number of functional carboxylic groups. Therefore, the concentrations of the monomers in the process gas have been varied as well as the plasma conditions. The MAA/VTMS plasma-copolymer layers were characterized by ATR FT-IR spectroscopy directly after the preparation as well as after exposure to aqueous solutions and the influence of annealing the layers has been investigated. The amount of carbon present within carboxylic groups was quantified by XPS measurements. As one of the applications of the new type of coatings, its reversible binding properties for gDNA out of blood lysates have been evaluated using a PCR reaction.