Surface functionalization by RF plasma deposition of ethylene diamine, acrylonitrile, and acetonitrile

• Published in: Journal of applied polymer science Vol. 107; no. 3; pp. 1686 - 1695
• Main Authors: Jampala, Soujanya N, Sarmadi, M, Manolache, S, Denes, F.S
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 05.02.2008; Wiley
• Subjects: amines; Applied sciences; Exact sciences and technology; Physicochemistry of polymers; plasma polymerization; Polymerization; Polymers and radiations; surface modification; thin films; Acrylonitrile; Molecular structure; surface modification; amines; Experimental study; Functional polymer; Glow discharge polymerization; thin films; Structure processing relationship; Diamine; Cold plasma; plasma polymerization; Acrylonitrile polymer; Amine polymer; Stainless steel; Acetonitrile; Crosslinked polymer; Olefin polymer; Plasma deposition
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.27189

Surface rich in covalently-bonded amine groups have wide end use applications in biomaterials. This article describes functionalization of stainless steel (SS) surface with reactive chemical groups using RF-cold-plasma polymerization of ethylene diamine (ED), acrylonitrile (AN), and acetonitrile (AcN). The effect of RF plasma power and frequency (40 kHz and 13.56 MHz) on surface chemistry was investigated by electron spectroscopy for chemical analysis (ESCA) and FTIR. It was demonstrated that all the plasma-deposited films consist of secondary and tertiary amines, imines, and amides with a small concentration of nitrile groups present in AN plasma. Significant changes in ED, and AN plasma-induced molecular fragmentation occur as the plasma conditions are varied. However, AcN plasma polymer chemistry is observed to be independent of RF frequency. Films deposited at 13.56 MHz RF power in continuous mode have higher concentrations of C---N linkages, with maximum in ED plasma-polymerized films. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008