Plasma Surface Modification of Glass-Fibre-Reinforced Polyester Enhanced by Ultrasonic Irradiation

Publication: Research - peer-reviewConference article – Annual report year: 2010

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During atmospheric pressure plasma treatment, reactive species generated in the plasma diffuse through a boundary gas layer which is adsorbed at the material surface. Many of the reactive species become inactivated before reaching the surface due to their short lifetime. The efficiency of plasma treatment can be highly enhanced by simultaneous high-power ultrasonic irradiation of the treating surface, because the delivered acoustic energy can reduce the thickness of the boundary gas layer. Here surfaces of glass-fibre-reinforced polyester (GFRP) plates were treated using an atmospheric pressure dielectric barrier discharge in helium with ultrasonic irradiation, particularly for the adhesion improvement. The ultrasound was irradiated through a powered mesh electrode using a high-power gas-jet ultrasonic generator. The discharge mode changed from glow to filamentary by the ultrasonic irradiation. The surface characterizations were performed using contact angle measurements, X-ray photoelectron spectroscopy (XPS) and atomic force mictroscopy (AFM). O/C ratios at the GFRP surfaces before the treatments, after 30-s plasma treatment, and after 30-s plasma treatment with ultrasonic irradiation were 0.295, 0.385 and 0.447, respectively. This indicated that the plasma treatment oxidized and roughened the GFRP surface, and the ultrasonic irradiation further enhanced the oxidation. It is concluded that plasma treatment efficiency for adhesion improvement of GFRPs is enhanced by the ultrasonic irradiation.
Original languageEnglish
JournalJournal of Adhesion Science and Technology
Issue number11-12
Pages (from-to)1831-1839
StatePublished - 2010
Event3rd International conference of adhesion science and technology on advanced computational engineering and experimenting - Rome (IT), 22-23 Jun


Conference3rd International conference of adhesion science and technology on advanced computational engineering and experimenting
CityRome (IT), 22-23 Jun
Period01/01/2009 → …
CitationsWeb of Science® Times Cited: 14


  • Plasma processing
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