Aramid nanofiber-reinforced multilayer electromagnetic-interference (EMI) shielding composites with high interfacial durability

Dong-Jun Kwon; Il-Jun Kwon; JoAnna Milam-Guerrero; Seong Baek Yang; Jeong Hyun Yeum; Hyun Ho Choi

Materials & Design (Mar 2022)

Aramid nanofiber-reinforced multilayer electromagnetic-interference (EMI) shielding composites with high interfacial durability

Dong-Jun Kwon,
Il-Jun Kwon,
JoAnna Milam-Guerrero,
Seong Baek Yang,
Jeong Hyun Yeum,
Hyun Ho Choi

Affiliations

Dong-Jun Kwon: Research Institute for Green Energy Convergence Technology (RIGET), Gyeongsang National University, Jinju 52828, Republic of Korea
Il-Jun Kwon: Korea Dyeing and Finishing Technology Institute, DYETEC Institute, Daegu 41706, Republic of Korea
JoAnna Milam-Guerrero: Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame 46556, USA
Seong Baek Yang: Department of Bio-fibers and Bio-materials Science, Kyungpook National University, Daegu 41566, Republic of Korea
Jeong Hyun Yeum: Department of Bio-fibers and Bio-materials Science, Kyungpook National University, Daegu 41566, Republic of Korea; Corresponding authors at: Research Institute for Green Energy Convergence Technology (RIGET), Gyeongsang National University, Jinju 52828, Republic of Korea (H.H. Choi).
Hyun Ho Choi: Research Institute for Green Energy Convergence Technology (RIGET), Gyeongsang National University, Jinju 52828, Republic of Korea; Department of Materials Engineering and Convergence Technology, Gyeongsang National University, Jinju 52828, Republic of Korea; Corresponding authors at: Research Institute for Green Energy Convergence Technology (RIGET), Gyeongsang National University, Jinju 52828, Republic of Korea (H.H. Choi).

Journal volume & issue: Vol. 215
p. 110452

Abstract

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Structural composites for electric vehicles should have lightweight, mechanically strong, efficient electromagnetic shielding. Although thermoplastic composite material plays a structural role and aluminum thin film (Al foil) plays the role of electromagnetic wave shielding, poor interfacial adhesion and tear-resistance of Al foil need to be overcome. In this work, we demonstrated a novel, high-performance EMI-shielding multilayer structure based on an aluminum thin film (Al), glass fabric (GF), carbon fiber-reinforced thermoplastic (CFT), and thermoplastic adhesive. In particular, the interfacial adhesion at the mechanically weak interface has been significantly improved by a factor of 1.15 via the application of an aramid nanofiber-embedded (ANF) thermoplastic interlayer. We found that the distribution and entanglement of aramid nanofibers in the ANF adhesive layer precisely determine the mechanical properties of the entire structural composite. Efficient EMI shielding performance (an average of 94 dB at 0.2–1.0 GHz) of structural EMI shielding composites was possible using a uniform aramid nanofiber layer.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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