| 초록 |
Carbon nanotube and powdered-carbon fiber (PCF) were used as reinforcements to improve the mechanical properties of epoxy composites. Also, the surface of PCF was treated by oxyfluorination which effect on interfacial adhesion of epoxy resins with PCF. The surface properties of oxyfluorinated PCF were investigated, which are surface-composition change and wettability using X-ray photoelectron microscopy (XPS) and contact angle (CA). Then, the cross-sectional of epoxy composites was observed by scanning electron microscope (SEM). The tensile and impact test were performed to evaluate the mechanical properties of epoxy composites. As the results, the epoxy composites reinforced POF 37 and CNT were most enhanced by 112% , 35% in tensile and impact strength, respectively than those of raw-epoxy. This result was attributed to improved interfacial adhesion between PCF and epoxy resin by increasing polarity of the surface by oxyfluorination and higher partial pressure of fluorine gas. |
