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Surface modification of polymers at atmospheric pressure in expanding RF plasmas generated by planar dielectric barrier discharges

M. D. IONITA1, M. TEODORESCU1, C. STANCU1, E. C. STANCU1, E. R. IONITA1, A. MOLDOVAN1, T. ACSENTE1, M. BAZAVAN2, G. DINESCU1

Affiliation

  1. National Institute for Laser, Plasma and Radiation Physics, PO Box MG 36, 077125, Magurele, Bucharest, Romania
  2. University of Bucharest, Faculty of Physics PO Box MG 11, 077125 Magurele, Romania

Abstract

We present a small dielectric barrier discharge radiofrequency plasma source, operating at 13.56 MHz, having a rectangular configuration. The source generates a knife-like cold expanding plasma jet, suitable for polymer surface modification. The planar jet was characterized by thermocouple measurements and Optical Emission Spectroscopy which show low thermal loading at substrate and the presence of active plasma species. Polyethylene terephthalate, polyvinyl chloride for medical usage, polyethylene, polytetrafluoroethylene foils were treated in open atmosphere with the source working in argon. The modification of the treated surfaces was investigated by contact angle measurements, Atomic Force Microscopy and adhesion measurements. A substantial improvement of wettability and adhesion was obtained..

Keywords

Plasma treatment of polymers, Atmospheric plasma sources, Dielectric barrier discharges, Surface modification.

Submitted at: June 22, 2009
Accepted at: Feb. 27, 2010

Citation

M. D. IONITA, M. TEODORESCU, C. STANCU, E. C. STANCU, E. R. IONITA, A. MOLDOVAN, T. ACSENTE, M. BAZAVAN, G. DINESCU, Surface modification of polymers at atmospheric pressure in expanding RF plasmas generated by planar dielectric barrier discharges, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 3, pp. 777-782 (2010)