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Locally Resolved Analysis of Polymer Surface Functionalization by an Atmospheric Pressure Argon Microplasma Jet with Air Entrainment
Author(s) -
Vogelsang Andreas,
Ohl Andreas,
Steffen Hartmut,
Foest Rüdiger,
Schröder Karsten,
Weltmann KlausDieter
Publication year - 2010
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.200900091
Subject(s) - microplasma , contact angle , jet (fluid) , surface modification , afterglow , argon , x ray photoelectron spectroscopy , atmospheric pressure , materials science , analytical chemistry (journal) , oxygen , nitrogen , entrainment (biomusicology) , chemistry , plasma , chemical engineering , composite material , thermodynamics , chromatography , organic chemistry , meteorology , physics , quantum mechanics , astronomy , engineering , gamma ray burst , rhythm , acoustics
Abstract Local analysis was performed of the chemical modification of polymeric surfaces induced by an atmospheric pressure microplasma jet operated with argon and small additions of air (1%). In particular, radial profiles were determined of water contact angle measurements and of the chemical surface composition using X‐ray photoelectron spectroscopy. Special emphasis was given to the effects of air entrainment. Contact angle profiles significantly vary with treatment time. For longer treatment, the narrow primary profiles are superimposed by much wider secondary profiles of different shapes. That indicates the existence of different modification mechanisms. One possible reason for that is additional oxygen admixture to the radial afterglow. According to the analysis of nitrogen incorporation, substantial radial variations are found for the portion of gas phase oxygen and alkyl surface radicals, respectively.