Transferred plasma jet from a dielectric barrier discharge for processing of poly(dimethylsiloxane) surfaces

摘要

In this work we studied processing of poly(dimethylsiloxane) (PDMS) surfacesusing dielectric barrier discharge (DBD) plasma in two different assemblies,one using the primary plasma jet obtained from a conventional DBD and the otherusing a DBD plasma jet transfer. The evolution of water contact angle (WCA) infunction of plasma processing time and in function of aging time as well as thechanges in the surface roughness of PDMS samples for both plasma treatmentshave been studied. We also compared vibrational and rotational temperatures forboth plasmas and for the first time the vibrational temperature (T_vib) for thetransferred plasma jet has been shown to be higher as compared with the primaryjet. The increment in the T_vib value seems to be the main reason for theimprovements in adhesion properties and surface wettability for the transferredplasma jet. Possible explanations for the increase in the vibrationaltemperature are presented.