Berlin 2001 – scientific programme

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P: Plasmaphysik

P 8: Magnetic Confinement and Plasma Technology (Poster Session)

P 8.19: Poster

Monday, April 2, 2001, 12:30–15:00, AT2

Plasma treatment of vapor grown carbon fibers — •Ekkehard Pasch, Moritz Heintze, and Karsten Schröder — INP-Greifswald

Vapor-grown carbon fibers (VGCF) are produced catalytically on metallic surfaces from gaseous hydrocarbons. VGCF have excellent values of tensile strength and modulus. Therfore, there has been a recent interest in investigating the potential of VGCF as a reinforcement for composite materials. To improve the covalent linking of the VGCF to the polymer matrix, some surface treatment of the VGCF is needed. Methods normally used are oxidation in air or more recently by plasma treatment. The latter has the advantage of a controlled chemical influence without changing the fiber structure. The type and density of functional groups depend on the plasma process conditions. Commonly oxygen or nitrogen plasmas are used.

Chemical surface analysis results of VGCF after treatment in oxygen or nitrogen containing plasmas are presented. For treating larger amounts of fibers a low-pressure fluidized bed reactor was developed.