| 초록 |
The effects of oxygen plasma treatment on surface and mechanical interfacial properties of carbon fibers and mechanical interfacial properties of their composites were studied. As experimental results, FT-IR of the carbon fibers showed that the carboxyl/ester groups (C=O) at 1632 cm-1 and hydroxyl group (O-H) at 3450 cm-1 were observed in the plasma treated carbon fibers, and the plasma treated carbon fibers had a higher O-H peak intensity than that of the untreated ones. The XPS results also indicated that the O1S/C1S ratio of the carbon fiber surfaces treated by the oxygen plasma was increased compared to that of untreated ones, possibly due to the development of oxygen-containing functional groups. Mechanical interfacial properties of the composites, including KIC and GIIC, were also improved in the oxygen plasma-treated carbon fibers-reinforced composites. |
