Electrically Conductive Ti3C2Tx MXene/Polypropylene Nanocomposites with an Ultralow Percolation Threshold for Efficient Electromagnetic Interference Shielding

• DOI: 10.1021/acs.iecr.1c00320
• Publication Date: 2021-03-16T11:49:23Z
• Authors: Ming-Ke Xu; Ji Liu; Hao-Bin Zhang; Yu Zhang; Xinyu Wu; Zhiming Deng; Zhong-Zhen Yu
• Keywords: Polypropylene; Polymer nanocomposite; MXenes; Percolation (cognitive psychology); Compression molding

Electrically conductive polymer nanocomposites are highly required for efficient electromagnetic interference (EMI) shielding applications. Although two-dimensional transition metal carbide/carbonitride (MXene) nanosheets with metallic electrical conductivity and layered structure show great potential the construction of interconnected conductance networks in matrices, their preferred stacking feature intrinsic hydrophilicity inevitably cause poor dispersion organic polymers, making it challenging to prepare MXene/polymer high satisfactory EMI performances at low MXene contents. Herein, we demonstrate an methodology MXene/polypropylene (PP) ultralow percolation threshold application. By dip-coating onto a polyethyleneimine-grafted PP textile, followed by vacuum-assisted compression molding, network matrix is constructed facilely efficiently. The resultant MXene/PP nanocomposite exhibits 0.027 vol %, 437.5 S m–1 loading 2.12 outstanding performance more than 60 dB within X-band, superior most other electrically nanocomposites. This work provides new approach fabricating high-performance