| 초록 |
In this work, single-walled carbon nanotubes (SWCNTs) surface was successfully modified using the ozone treatment for use as the reinforcement for multi-scale composites. We focused on the fracture toughness, crack resistance, dispersion and interfacial adhesion synergistic effects of ozone-treated SWCNTs (O-SWCNTs) in epoxy matrix and carbon fibers, mechanical properties of the prepared composites were investigated according to weight ratio of O-SWCNTs. The mechanical properties were calculated by the critical stress intensity factor (KIC), critical strain energy release rate (GIC) and interlaminar shear strength (ILSS). The morphology was observed by scanning electron microscope (SEM) and field emission transmission electron microscopy (FE-TEM). Ozone treatment, an environmentally friendly and simple method, suggests a way to improve the mechanical properties of multi-scale composites and modify the surface properties of O-SWCNTs. |
