| 초록 |
To develop high-quality electromagnetic interference shielding efficiency (EMI SE) materials, nickel-carbon fiber papers (Ni-CPs) were prepared using an electroless nickel-plating method and a wet-laid process to obtain Ni-CP/epoxy composites with enhanced EMI SE. The morphologies and structural properties of Ni-CPs were determined using scanning electron microscopy (SEM) and X-ray diffraction (XRD). It was found that the intensity of the metallic Ni peak increased with increasing Ni-plating time. In the frequency range of the electromagnetic waves from electrical appliances (0.5–1.0 GHz), the 5Ni-CP/epoxy composites of 0.25 mm thickness exhibited high EMI SE. The EMI SE of the composites was measured according to ASTM D4935-99 and increased in proportion to the current density because of the role of Ni particles. This result implies that the presence of Ni on the pitch-based carbon fibers can lead to good EMI SE, owing to the EMI adsorption behaviors of the metal particles. |
