Issue

Vol. 14 (2022)

Porous and Ultra-Flexible Crosslinked MXene/Polyimide Composites for Multifunctional Electromagnetic Interference Shielding

https://doi.org/10.1007/s40820-022-00800-0
Zhi‑Hui Zeng
Key Laboratory for Liquid‑Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan 250061, People’s Republic of China
Na Wu
Department of Chemistry and Applied Biosciences, ETH Zurich, CH‑8093 Zurich, Switzerland
Jing‑Jiang Wei
Laboratory for Cellulose and Wood Materials, Swiss Federal Laboratories for Materials Science and Technology (Empa), 8600 Dübendorf, Switzerland
Yun‑Fei Yang
Key Laboratory for Liquid‑Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan 250061, People’s Republic of China
Ting‑Ting Wu
Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology (Empa), 8600 Dübendorf, Switzerland
Bin Li
Key Laboratory for Liquid‑Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan 250061, People’s Republic of China
Stefanie Beatrice Hauser
Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology (Empa), 8600 Dübendorf, Switzerland
Wei‑Dong Yang
School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, People’s Republic of China
Jiu‑Rong Liu
Key Laboratory for Liquid‑Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan 250061, People’s Republic of China
Shan‑Yu Zhao
Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology (Empa), 8600 Dübendorf, Switzerland

Corresponding Author: Shan‑Yu Zhao

shanyu.zhao@empa.ch

Nano-Micro Letters, Vol. 14 (2022), Article Number: 59

Abstract

Lightweight, ultra-flexible, and robust crosslinked transition metal carbide (Ti3C2 MXene) coated polyimide (PI) (C-MXene@PI) porous composites are manufactured via a scalable dip-coating followed by chemical crosslinking approach. In addition to the hydrophobicity, anti-oxidation and extreme-temperature stability, efficient utilization of the intrinsic conductivity of MXene, the interfacial polarization between MXene and PI, and the micrometer-sized pores of the composite foams are achieved. Consequently, the composites show a satisfactory X-band electromagnetic interference (EMI) shielding effectiveness of 22.5 to 62.5 dB at a density of 28.7 to 48.7 mg cm−3, leading to an excellent surface-specific SE of 21,317 dB cm2 g−1. Moreover, the composite foams exhibit excellent electrothermal performance as flexible heaters in terms of a prominent, rapid reproducible, and stable electrothermal effect at low voltages and superior heat performance and more uniform heat distribution compared with the commercial heaters composed of alloy plates. Furthermore, the composite foams are well attached on a human body to check their electromechanical sensing performance, demonstrating the sensitive and reliable detection of human motions as wearable sensors. The excellent EMI shielding performance and multifunctionalities, along with the facile and easy-to-scalable manufacturing techniques, imply promising perspectives of the porous C-MXene@PI composites in next-generation flexible electronics, aerospace, and smart devices.


Highlights:


1 Large-area, lightweight, ultra-flexible, and robust crosslinked MXene-coated PI porous composites were manufactured via a scalable and facile approach.
2 In addition to the hydrophobicity, anti-oxidation and extreme-temperature stability, excellent electromagnetic interference shielding performance was achieved because of the high-efficiency utilization of the building units and microstructure.
3 Moreover, the highly flexible composite foams exhibited excellent electrothermal and electromechanical sensing performance, demonstrating promising perspectives in next-generation flexible electronics, aerospace, and smart devices.

Keywords

MXene Polyimide Electromagnetic interference shielding Heater Sensor
Zeng, Zhi‑Hui, Na Wu, Jing‑Jiang Wei, Yun‑Fei Yang, Ting‑Ting Wu, Bin Li, Stefanie Beatrice Hauser, Wei‑Dong Yang, Jiu‑Rong Liu, and Shan‑Yu Zhao. 2022. “Porous and Ultra-Flexible Crosslinked MXene/Polyimide Composites for Multifunctional Electromagnetic Interference Shielding”. Nano-Micro Letters 14 (February):59. https://doi.org/10.1007/s40820-022-00800-0.
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