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arXiv · 1611.03876

PTFE surface etching in the post-discharge of a RF scanning plasma torch: evidence of ejected fluorinated species

Thierry Dufour·Julie Hubert·Pascal Viville·Corinne Y. Duluard·Simon Desbief·Roberto Lazzaroni·François Reniers
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Abstract

The texturization of poly(tetrafluoroethylene) (PTFE) surfaces is achieved at atmospheric pressure by using the post-discharge of a radio-frequency plasma torch supplied in helium and oxygen gases. The surface properties are characterized by contact angle measurement, X-ray photoelectron spectroscopy and atomic force microscopy. We show that the plasma treatment increases the surface hydrophobicity (with water contact angles increasing from 115 to 155°) only by modifying the PTFE surface morphology and not the stoichiometry. Measurements of sample mass losses correlated to the ejection of CF$_2$ fragments from the PTFE surface evidenced an etching mechanism at atmospheric pressure.

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Thierry Dufour, Julie Hubert, Pascal Viville, Corinne Y. Duluard, Simon Desbief, Roberto Lazzaroni, François Reniers. 2016-05-02. PTFE surface etching in the post-discharge of a RF scanning plasma torch: evidence of ejected fluorinated species. https://doi.org/10.1002/ppap.201100209

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