Surface Energy Analysis of Carbon Fibers and Films

Abstract

Abstract Amorphous and graphitic carbon fibers and film surfaces are characterized by wettability measurements and surface energy analysis which isolate the (London-d) dispersion γd svand (Keesom-p) polar γp sv contribution to solid-vapor surface tension γsv =γd sv + γp sv Graphitized carbon fibers which are surface treated to provide strong bonding to polar matrix resins show consistent strong polar contributions to total surface tension with γd sv|γsv ≃ γp sv|γsv ≃ 0.50. Amorphous carbon films prepared for biological implant applications display dominant dispersion character in surface energy with γd sv|γsv ≃ 0-74 to 0.95 and γp sv|γsv ≃ 0.05 to 0.24.