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Published in: Journal of Materials Science 13/2024

23-03-2024 | Polymers & biopolymers

Flexible regenerated cellulose composite films with sandwich structures for high-performance electromagnetic interference shielding

Authors: Ting Zhang, Cuiling Wu, Binghan Ji, Bin Li, Xueyan Du

Published in: Journal of Materials Science | Issue 13/2024

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Abstract

Electromagnetic radiation pollution has become increasingly serious in the electronic, industrial, civil, and military fields. Lightweight, flexible, and high-performance electromagnetic shielding films have recently become popular research topics. Herein, regenerated cellulose (RC) was used as the matrix, multi-walled carbon nanotube (MWCNTs) and Fe3O4 nanoparticles were used as fillers, the sandwich-structured composite films (SCFs) containing MWCNTs/RC film as the surface layer and Fe3O4/RC film as the interlayer were successfully prepared via immersion phase conversion and mechanical pressing methods. SCFs exhibited a conductivity of 2.0 S m−1 and an excellent electromagnetic interference shielding effectiveness of 25.6 dB, which were 147% and 32% higher than those of the monolayer composite films at the same filler contents, respectively. The shielding mechanism was mainly attributed to electromagnetic dual energy dissipation and a “reflection–absorption–reflection” effect of the sandwich structure on electromagnetic waves. In addition, the maximum tensile strength of SCFs reached 18.0 MPa, which was attributed to the addition of MWCNTs and the construction of the sandwich structure.

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Appendix
Available only for authorised users
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Metadata
Title
Flexible regenerated cellulose composite films with sandwich structures for high-performance electromagnetic interference shielding
Authors
Ting Zhang
Cuiling Wu
Binghan Ji
Bin Li
Xueyan Du
Publication date
23-03-2024
Publisher
Springer US
Published in
Journal of Materials Science / Issue 13/2024
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-024-09543-2

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