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Title: Permanent hydrophilization of outer and inner surfaces of polytetrafluoroethylene tubes using ambient air plasma generated by surface dielectric barrier discharges

We present an atmospheric pressure ambient air plasma technique developed for technically simple treatment of inner and/or outer surfaces of plastic tubes and other hollow dielectric bodies. It is based on surface dielectric barrier discharge generating visually diffuse plasma layers along the treated dielectric surfaces using water-solution electrodes. The observed visual uniformity and measured plasma rotational and vibrational temperatures of 333 K and 2350 K indicate that the discharge can be readily applied to material surface treatment without significant thermal effect. This is exemplified by the obtained permanent surface hydrophilization of polytetrafluoroethylene tubes related to the replacement of a high fraction (more than 80%) of the surface fluorine determined by X-ray photoelectron spectroscopy. A tentative explanation of the discharge mechanism based on high-speed camera observations and the discharge current and voltage of measurements is outlined.
Authors:
; ; ; ; ;  [1]
  1. Department of Physical Electronics, Masaryk University, Kotlarska 2, Brno 60200 (Czech Republic)
Publication Date:
OSTI Identifier:
22350932
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 15; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AQUEOUS SOLUTIONS; ATMOSPHERIC PRESSURE; CURRENTS; DIELECTRIC MATERIALS; ELECTRIC POTENTIAL; FLUORINE; LAYERS; PLASMA; PLASTICS; POLYTETRAFLUOROETHYLENE; SURFACE TREATMENTS; SURFACES; X-RAY PHOTOELECTRON SPECTROSCOPY