Surface characterization and radical decay studies of oxygen plasma‐treated PMMA films

• DOI: 10.1002/sia.5181
• Publication Date: 2012-11-21T17:06:19Z
• Authors: Ozge Ozgen; Eda Ayse Aksoy; Vasif Hasirci; Nesrin Hasirci
• Keywords: 0103 physical sciences; 01 natural sciences

Polymethylmethacrylate (PMMA) films were modified by RF oxygen plasma with various powers applied for different periods, and the effects of these parameters on surface properties such as hydrophilicity, free energy (SFE), chemistry, topography investigated water contact angle, goniometer, X‐ray photoelectron spectroscopy (XPS), atomic force microscopy, types created radicals their decay detected electron spin resonance (ESR). SFE angle results varied depending parameters. Oxygen treatment (100 W–30 min) enhanced hydrophilicity PMMA shown decreasing from 70° to 26°. XPS analysis showed change in amounts present functionalities well formation new groups carbonyl carbonate groups. The roughness increased considerably ~2 nm ~75 after 100 min treatment. ESR indicated introduction peroxy treatment, intensity increasing power. Significant decrease radical concentration was observed especially samples treated higher when kept under atmospheric conditions. As a conclusion, plasma, causes changes chemical physical materials parameters, can be used creation specific or link immobilize active molecules onto material. Copyright © 2012 John Wiley & Sons, Ltd.