MXene-Based Electromagnetic Interference Shielding Composites with Hierarchical Porous Architecture

James Okonkwo; Lin Huang; Isabella Rossi

doi:10.55001/jams.v1i2.51

摘要

Ti₃C₂Tₓ MXene nanosheets are integrated with carbon nanotube (CNT) scaffolds and polydimethylsiloxane (PDMS) matrix to fabricate flexible EMI shielding composites with a hierarchical porous architecture. The optimized composite (70 wt% MXene, 5 wt% CNT, 25 wt% PDMS) achieves an EMI shielding effectiveness (SE) of 62.8 dB at 12.4 GHz (X-band) with a thickness of only 0.3 mm, corresponding to a specific SE of 20,933 dB·cm²/g — among the highest reported for polymer-based shielding materials. The shielding mechanism analysis reveals that absorption contributes 78% of total attenuation, attributed to multiple internal reflections within the porous MXene network and interfacial polarization at MXene-CNT junctions. The composites maintain SE > 55 dB after 5,000 bending cycles at 5 mm radius, demonstrating excellent mechanical durability for flexible electronics and aerospace applications.

作者简介

James Okonkwo Department of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA

James Okonkwo is a senior researcher at Department of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA. Their research focuses on data analytics, with over 69 publications in peer-reviewed journals.
Lin Huang College of Materials Science and Engineering, Hunan University, Changsha 410082, China

Lin Huang is a professor at College of Materials Science and Engineering, Hunan University, Changsha 410082, China. Their research focuses on social sciences, with over 54 publications in peer-reviewed journals.
Isabella Rossi Department of Industrial Engineering, Politecnico di Milano, 20133 Milano, Italy

Isabella Rossi is a research fellow at Department of Industrial Engineering, Politecnico di Milano, 20133 Milano, Italy. Their research focuses on machine learning, with over 31 publications in peer-reviewed journals.