Surface Modification of Pitch Based Carbon Fibers by Direct Fluorination Comparison with Anodic Oxidation.

Abstract

Abstract:We investigated the hydrophilicity of fluorinated carbon fibers at room temperature, that is a new method of surface treatment, and found that through this treatment, wettabillity of the surface of car bon fibers increased dramatically without decrease of tensile strength. Observation by scanning electron microscope (SEM) showed the same surface morphology of fluorinated carbon fibers as that of original fiber.On the other hand, of anodic oxidated fibers. In the case of anodic oxidation as the wettabillity of oxidated fibers increased, the surface roughness increased and resulted in the decrease of tensile strength.

Effects of fluorination on carbon molecular sieves for CH4/CO2 gas separation behavior

“…As shown in Table 2, covalent and semi-covalent C F bonds were present on the surface of the CMSs. In general, carbon materials form many semicovalent bonds during fluorination at room temperature (Chong et al, 1993).…”