LDPE surface modifications induced by atmospheric plasma torches with linear and showerhead configurations

Sami Abou Rich, Thierry Dufour, Perrine Leroy, François Reniers, Laurent Nittler, Jean Jacques Pireaux

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    Résumé

    Low density polyethylene (LDPE) surfaces have been plasma modified to improve their nanostructural and wettability properties. These modifications can significantly improve the deposition of subsequent layers such as films with specific barrier properties. For this purpose, we compare the treatments induced by two atmospheric plasma torches with different configurations (showerhead vs. linear). The modifications of LDPE films in terms of chemical surface composition and surface morphology are evidenced by X-ray photoelectron spectroscopy, water contact angles measurements, and atomic force microscopy. A comparison between the two post-discharge treatments is achieved for several torch-to-substrate distances (gaps), treatment times, and oxygen flow rates in terms of etching rate, roughening rate, diffusion of oxygen into the subsurface and hydrophilicity. By correlating these results with the chemical composition of the post-discharges, we identify and compare the species which are responsible for the chemical surface functionalization, the surface roughening, and etching.

    langue originaleAnglais
    Pages (de - à)771-785
    Nombre de pages15
    journalPlasma Processes and Polymers
    Volume12
    Numéro de publication8
    Les DOIs
    Etat de la publicationPublié - 1 août 2015

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