High-Performance Electromagnetic Interference Shielding of Acid-Doped Single-Walled Carbon Nanotubes = High-Performance Electromagnetic Interference Shielding of Acid-Doped Single-Walled Carbon Nanotubes

다국어 초록 (Multilingual Abstract)

The increasing demand for lightweight electromagnetic interference (EMI) shielding materials has made single-walled carbon nanotubes (SWCNTs) attractive candidates due to their intrinsically high electrical conductivity. In this study, we investigate the effect of acid doping on the EMI shielding (EMI SH) performance of SWCNT films. The films were fabricated via a simple vacuum filtration process and doped using camphor sulfonic acid (CaSA) and chlorosulfonic acid (CSA). A systematic investigation of CaSA concentration revealed only minimal changes in the overall EMI shielding effectiveness. In contrast, increasing the maceration time during CSA post-treatment resulted in a modest enhancement in shielding effectiveness (≈2-3 dB). However, prolonged maceration led to noticeable structural degradation of the SWCNT films. These results indicate that acid doping primarily influences the shielding behavior rather than significantly improving the total shielding effectiveness, highlighting the importance of optimizing acid strength and processing conditions for SWCNT-based EMI shielding materials.