Flexible and excellent electromagnetic interference shielding film with porous alternating PVA-derived carbon and graphene layers

Jiatong Li; Jinzhe Li; Tian Li; Zhengkang Xu; Yao Chen; Likui Zhang; Qing Qi; Benliang Liang; Fanbin Meng

iScience (Oct 2023)

Flexible and excellent electromagnetic interference shielding film with porous alternating PVA-derived carbon and graphene layers

Jiatong Li,
Jinzhe Li,
Tian Li,
Zhengkang Xu,
Yao Chen,
Likui Zhang,
Qing Qi,
Benliang Liang,
Fanbin Meng

Affiliations

Jiatong Li: Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P.R. China
Jinzhe Li: Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P.R. China
Tian Li: Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P.R. China
Zhengkang Xu: Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P.R. China
Yao Chen: Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P.R. China
Likui Zhang: Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P.R. China
Qing Qi: Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P.R. China; Corresponding author
Benliang Liang: School of Physical Science and Engineering, Beijing Jiaotong University, Beijing 100044, China; Corresponding author
Fanbin Meng: Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P.R. China; Shenzhen Institute of Southwest Jiaotong University, Shenzhen 518000, China; Corresponding author

Journal volume & issue: Vol. 26, no. 10
p. 107975

Abstract

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Summary: Recently, the design of graphene-based films with elaborately controlled microstructures and optimized electromagnetic interference shielding (EMI) properties can effectively improve EM energy attenuation and conversion. Herein, inspired by the structure of multi-layer steamed bread, an alternating multilayered structure with polyvinyl alcohol (PVA)-derived carbon layers and graphene/electrospun carbon nanofibers layers was designed through alternating vacuum-assisted filtration method. The composite film exhibited favorable impedance matching, abundant loss mechanism, and excellent EMI shielding ability, resulting in absorption dominated shielding characteristic. Thus, the resultant 7-layer alternating composite films with a thickness of 160 μm achieved an EMI shielding effectiveness (EMI SE) of up to 80 dB in the X-band. Specially, finite element analysis was applied to demonstrate the importance of seven-layer film alternations and detailed analysis of electromagnetic shielding mechanisms. Taken together, this effort opens a creative avenue for designing and constructing flexible composite films with excellent EMI shielding performance.

Published in iScience

ISSN: 2589-0042 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Science
Website: http://www.cell.com/iscience/home

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