Enhanced electromagnetic shielding properties of Ti3(C1−yNy)2Tx/CNT:PANI films

Abstract

MXenes (M_x) exhibit excellent electromagnetic interference (EMI) shielding properties. However, the inherent restacking tendency and oxidation susceptibility of MXenes pose challenges for their practical application. In this study, Ti₃(C_1−yN_y)₂T_x (y = 0.3, 0.5) MXene nanosheets were introduced into multi-walled carbon nanotube:polyaniline (C:P), and M_x/C:P composite films were fabricated via a self-assembly technique. The optimized M_x/C:P20 composite films containing 80 wt% MXene loading exhibited the highest EMI shielding effectiveness (SE_T), reaching 45.03 dB and 41.93 dB. Due to the synergistic interaction between MXenes and C:P, the absorption contribution increased significantly, thereby enhancing the electromagnetic shielding performance of M_x/C:P composites. These findings highlight the potential of carbonitride MXene-based composites as lightweight and efficient candidates for next-generation EMI shielding applications.