| 초록 |
A surface-treatment was conducted for functionalization of powdered carbon fiber (PCF) via oxyfluorination in order to improve the interaction between the PCF and epoxy resin. The surface properties of surface-treated PCF were investigated, which are surface-composition change and wettability using X-ray photoelectron microscopy (XPS) and contact angle (CA). Then, the fracture surface of epoxy composites with PCF and CNT is observed by scanning electron spectroscope (SEM). The mechanical properties of the composites are evaluated by tensile and impact test, with the result that the composites reinforced POF37 and CNT are most enhanced by 38%, 21% respectively, in tensile and impact strength than those of PCF/CNT/epoxy composites. These results ascribed to improved interfacial adhesion between PCF and epoxy resin by increasing polarity of the surface due to oxyfluorination and higher partial pressure of fluorine gas. |
