Gliding arc surface treatment of glass-fiber-reinforced polyester enhanced by ultrasonic irradiation

Yukihiro Kusano, Kion Norrman, Joanna Maria Drews, Frank Leipold, Shailendra Vikram Singh, Per Morgen, Alexander Bardenshtein, Niels Krebs

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    A gliding arc is a plasma generated between diverging electrodes and extended by a high speed gas flow. It can be operated in air at atmospheric pressure. It potentially enables selective chemical processing with high productivity, and is useful for adhesion improvement of material surfaces. The efficiency of such a plasma treatment at atmospheric pressure can be further improved by ultrasonic irradiation onto the surface during the treatment. In the present work glass fiber reinforced polyester (GFRP) plates are treated using an atmospheric pressure gliding arc with and without ultrasonic irradiation to study adhesion improvement. The airflow at the arc ignition directed the GFRP surface at a grazing angle of approximately 30°. The ultrasonic waves of the frequency range between 20 and 40 kHz were introduced vertically to the GFRP surface through a cylindrical waveguide. It is found that ultrasonic irradiation reduced the OH rotational temperature of the gliding arc. The wettability of the GFRP surface was significantly improved by the plasma treatment without ultrasonic irradiation, and tended to improve furthermore at higher power to the plasma. Ultrasonic irradiation during the plasma treatment consistently improved the wettability. It is seen that polar functional groups were introduced at the surface by the gliding arc treatment, and that the treatment efficiency was enhanced by the ultrasonic irradiation, indicating that the adhesive property would be improved. TOF-SIMS ion images indicate that oxygen and nitrogen are uniformly attached at the treated surfaces with and without ultrasonic irradiation. The principal effect of the ultrasonic irradiation is attributed to enhanced oxidation during the plasma treatment.
    Original languageEnglish
    JournalSurface and Coatings Technology
    Volume205
    Pages (from-to)S490-S494
    ISSN0257-8972
    DOIs
    Publication statusPublished - 2011
    Event12th International Conference on Plasma Surface Engineering - Garmish-Partenkirchen, Germany
    Duration: 13 Sep 201017 Sep 2010
    http://www.pse2010.net/

    Conference

    Conference12th International Conference on Plasma Surface Engineering
    Country/TerritoryGermany
    CityGarmish-Partenkirchen
    Period13/09/201017/09/2010
    Internet address

    Keywords

    • Plasma processing

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