Jin‐Wook ShinJoon‐Pyo JeunPhil‐Hyun Kang
In this study, the electromagnetic interference shielding properties of multi-walled carbon nanotubes/epoxy composites were investigated in the frequency region from 1 approximately 8 GHz (L, S and C bands). Electromagnetic shielding samples were fabricated using an electron beam. The electromagnetic shielding properties of these absorber specimens were measured by a network analyzer (Agilent, 4901A), and their fracture behavior was analyzed by scanning electron microscopy. It was found that the saturation conductance depends on the fraction of the multi-walled carbon nanotubes in the composite, which affects the initial permittivity. These results show that the dielectric loss is a dominant factor in the L, S, and C bands, and the resonance frequency of the composite increased with the increasing fraction of multi-walled carbon nanotubes. Finally, the reflection loss was calculated from the permeability and permittivity of these composites. Composite with 10 wt% multi-walled carbon nanotubes and 1.5 mm thickness showed a reflection loss below -20 dB in the L, S, and C bands. Therefore, it is believed that thin multi-walled carbon nanotubes/epoxy composites may be good candidates for microwave absorption applications.
Yanyan LuHua LiMingjiang LinWeihua NgHezhou Liu
Meng‐Kao YehNyan‐Hwa TaiD. X. Lin
Meng Kao YehNyan Hwa TaiGuo LingChi Yuan Huang
Jianguo WangZhengping FangAijuan Gu
Rizwan Ul HassanFaisal ShahzadNadir AbbasSajjad Hussain