SURFACE-OXIDIZED CARBON-FIBERS .1. SURFACE-STRUCTURE AND CHEMISTRY

The surface structure and chemistry of various surface oxidized HT car bon fibers, an IM and a HM carbon fiber were studied by SEM, STM, CAM (contact angle measurement), XPS and TPD with special reference to ads orbed oxidation products and adsorbed water. It is shown that a real i mage of surface structure and surface chemistry is only obtained after removal of adsorbed oxidation products by extraction with water and c areful drying of the fibers without changing the surface chemistry. A comparison on the usefulness of the various surface analytical methods will be given in Parts II-IV of this paper. Copyright (C) 1996 Elsevi er Science Ltd