Preparation, Performance and Analysis of Carbon Fibers with Dielectric Barrier Discharges Plasma Surface Treatment

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Abstract:

The deposition of coatings on the surface of carbon fiber will be helpful to their appli-cations. However, they are unsuitable to be deposited due to their low surface free energies, poor wettability and poor adhesions. The objective of this work is to modify carbon fibers by Dielect-ric barrier discharges (DBD) in ambient argon. The chemical and physical changes induced by the treatments on carbon fibers surface are examined using contact angle measurements and X-ray photoelectron spectroscopy (XPS). The interfacial adhesion of CF/EP composites are analysised by a single filament pull-out test. The contact angles of the plasma-treated samples are visibly reduced than the untreated samples. XPS results reveal that the carbon fibers modified with the DBD at an atmospheric pressure show a significant increase in oxygen-containing groups, such as C–O,C=O and O–C=O. The results of IFSS tests show that the treated carbon fibers composit-es could possess excellent interfacial properties with mixed resins. These results demonstrate that the surfaces of the carbon fibers samples are more active, hydrophilic and rough after plasma treatments using a DBD operating in ambient argon.

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Advanced Materials Research (Volumes 391-392)

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8-12

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December 2011

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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