Inverse Gas Chromatography Characterization of Carbon Fiber Surfaces-Effects of Applied Surface Treatment

摘要

Inverse gas chromatography(IGC)is used to characterize the surfaces of carbon fibers subjected to electrolytic surface treatment at a range of treatment levels.Surface area analysis via BET shows only small differences in specific surface area as a function of treatment level.IGC data yield dispersive surface energies and the acid-base character of the fiber surfaces and show that surface treatment up to the standard level causes a reduction in the dispersive surface energy,consistent with surface oxidation and the corresponding X-ray photoelectron spectroscopy(XPS)results.Surface treatment also has a major effect on the acid-base characteristics of the fiber,its initially basic nature being replaced by acidic character and then amphoteric behavior at higher treatment levels.