Issue

Vol. 16 (2024)

Layered Structural PBAT Composite Foams for Efficient Electromagnetic Interference Shielding

https://doi.org/10.1007/s40820-023-01246-8
Jianming Yang
School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma’anshan, Anhui 243032, People’s Republic of China
Hu Wang
School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma’anshan, Anhui 243032, People’s Republic of China
Yali Zhang
Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, People’s Republic of China
Hexin Zhang
School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma’anshan, Anhui 243032, People’s Republic of China
Junwei Gu
Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, People’s Republic of China

Corresponding Author: Junwei Gu

nwpugjw@163.com

Nano-Micro Letters, Vol. 16 (2024), Article Number: 31

Abstract

The utilization of eco-friendly, lightweight, high-efficiency and high-absorbing electromagnetic interference (EMI) shielding composites is imperative in light of the worldwide promotion of sustainable manufacturing. In this work, magnetic poly (butyleneadipate-co-terephthalate) (PBAT) microspheres were firstly synthesized via phase separation method, then PBAT composite foams with layered structure was constructed through the supercritical carbon dioxide foaming and scraping techniques. The merits of integrating ferroferric oxide-loaded multi-walled carbon nanotubes (Fe3O4@MWCNTs) nanoparticles, a microcellular framework, and a highly conductive silver layer have been judiciously orchestrated within this distinctive layered configuration. Microwaves are consumed throughout the process of “absorption-reflection-reabsorption” as much as possible, which greatly declines the secondary radiation pollution. The biodegradable PBAT composite foams achieved an EMI shielding effectiveness of up to 68 dB and an absorptivity of 77%, and authenticated favorable stabilization after the tape adhesion experiment.


Highlights:
1 A layered segregated shielding network was organized in porous PBAT/Fe3O4@MWCNTs/Ag composite by scCO2 foaming and scraping techniques.
2 The composite foam achieved an electromagnetic interference (EMI) shielding effectiveness (SE) of up to 68.0 dB and a reflectivity of as low as 23% due to the “absorption-reflection-re-absorption” shielding mechanism.
3 The solid and foamed PBAT/Fe3O4@MWCNTs/Ag composites displayed superior retention (> 92%) of EMI SE even after peeling experiment of 500 times under 100 g weight pressure.

Keywords

Electromagnetic interference shielding Layered structure Supercritical carbon dioxide foaming Poly (butyleneadipate-co-terephthalate) Microcellular
Yang, Jianming, Hu Wang, Yali Zhang, Hexin Zhang, and Junwei Gu. 2023. “Layered Structural PBAT Composite Foams for Efficient Electromagnetic Interference Shielding”. Nano-Micro Letters 16 (November):31. https://doi.org/10.1007/s40820-023-01246-8.
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