Improvement of aerospace thermoplastic composite adhesion to coating with dielectric barrier discharge atmospheric pressure plasma surface treatment

Atmospheric pressure plasma with dielectric barrier discharge is used to improve the adhesion of novel composite carbon fiber reinforced low melting poly (aryl ether ketone) (CF/LMPAEK) to aerospace coatings under ambient and gas flow (Ar‐O2). The surface activation is evaluated by contact angle mea...

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Bibliographic Details
Published in:Plasma processes and polymers 2023-01, Vol.20 (1), p.n/a
Main Authors: Lapena, Mauro H., Lopes, Cristina Moniz Araujo
Format: Article
Language:English
Subjects:
Abrasion
Adhesion
aging
Atmospheric pressure
atmospheric pressure plasma
carbon fiber reinforced polymer (CFRP)
Carbon fibers
coating
Contact angle
Dielectric barrier discharge
Fiber composites
Gas flow
Ketones
Oxygen plasma
Photoelectrons
Primers (coatings)
Surface activation
Surface treatment
X ray photoelectron spectroscopy
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Summary:Atmospheric pressure plasma with dielectric barrier discharge is used to improve the adhesion of novel composite carbon fiber reinforced low melting poly (aryl ether ketone) (CF/LMPAEK) to aerospace coatings under ambient and gas flow (Ar‐O2). The surface activation is evaluated by contact angle measurement and X‐ray photoelectron spectroscopy (XPS). Different atmospheres are used to prevent aging of the treated surface. The water contact angle is considerably reduced after plasma treatment, and the formation of oxygen and nitrogen polar groups is confirmed by XPS analysis. Plasma treatment improves the adhesion of CF/LMPAEK to the topcoat on the primer coating system to the traditional abrasion treatment level. This effect even is intensified with Ar‐O2 plasma. The topcoat alone presents a higher adherence, which provides a reduced coating usage option. Atmospheric pressure plasma dielectric barrier discharge plasma treatment increases the adhesion of CF/LMPAEK composite to polyurethane coating system up to 200% compared to traditional abrasion pretreatment. Ar‐O2 plasma enhances adherence while the increase in the number of passes has no substantial effect. Considering adhesion characteristics only, plasma treatment suppresses the need for primer allowing direct coating with topcoat
ISSN:1612-8850
1612-8869
DOI:10.1002/ppap.202200081