MXene/polyurethane auxetic composite foam for electromagnetic interference shielding and impact attenuation

Eunyoung Kim; Hongming Zhang; Jeng Hun Lee; Haomin Chen; Heng Zhang; Muhammad Humza Javed; Xi Shen; Jang Kyo Kim

doi:10.1016/j.compositesa.2021.106430

MXene/polyurethane auxetic composite foam for electromagnetic interference shielding and impact attenuation

Eunyoung Kim, Hongming Zhang, Jeng Hun Lee, Haomin Chen, Heng Zhang, Muhammad Humza Javed, Xi Shen, Jang Kyo Kim

Mechanical & Nuclear Engineering

The Hong Kong University of Science and Technology

Research output: Contribution to journal › Article › peer-review

82 Scopus citations

Abstract

Lightweight electromagnetic interference (EMI) shielding and impact attenuating materials are vital to protect delicate components in portable electronics. While conductive foams are intriguing for lightweight EMI shielding, their impact attenuating properties remain unexplored. Herein, a MXene/auxetic polyurethane (MX/APU) composite foam is developed for multifunctional EMI shielding and impact attenuation. The MX/APU composite presents a superior EMI shielding effectiveness (SE) of 76.2 dB, 31.2% higher than its non-auxetic counterpart at the same density owing to the larger specific surface area arising from the auxetic structure. Given its ultralow density of 0.063 g cm⁻³, it yields a specific SE of 1210 dB cm³ g⁻¹, placing it among the best candidates for lightweight applications. The negative Poisson's ratio of MX/APU composite foam also delivers multifunctionalities of impact attenuation, reducing the peak force by 51.4% compared to a non-auxetic foam. This work provides a conceptually new approach to design lightweight multifunctional materials using auxetic structures.

Original language	British English
Article number	106430
Journal	Composites Part A: Applied Science and Manufacturing
Volume	147
DOIs	https://doi.org/10.1016/j.compositesa.2021.106430
State	Published - Aug 2021

Keywords

Auxetic composite
Electromagnetic interference shielding
Impact attenuation
MXene

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10.1016/j.compositesa.2021.106430

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title = "MXene/polyurethane auxetic composite foam for electromagnetic interference shielding and impact attenuation",

abstract = "Lightweight electromagnetic interference (EMI) shielding and impact attenuating materials are vital to protect delicate components in portable electronics. While conductive foams are intriguing for lightweight EMI shielding, their impact attenuating properties remain unexplored. Herein, a MXene/auxetic polyurethane (MX/APU) composite foam is developed for multifunctional EMI shielding and impact attenuation. The MX/APU composite presents a superior EMI shielding effectiveness (SE) of 76.2 dB, 31.2% higher than its non-auxetic counterpart at the same density owing to the larger specific surface area arising from the auxetic structure. Given its ultralow density of 0.063 g cm−3, it yields a specific SE of 1210 dB cm3 g−1, placing it among the best candidates for lightweight applications. The negative Poisson's ratio of MX/APU composite foam also delivers multifunctionalities of impact attenuation, reducing the peak force by 51.4% compared to a non-auxetic foam. This work provides a conceptually new approach to design lightweight multifunctional materials using auxetic structures.",

keywords = "Auxetic composite, Electromagnetic interference shielding, Impact attenuation, MXene",

author = "Eunyoung Kim and Hongming Zhang and Lee, {Jeng Hun} and Haomin Chen and Heng Zhang and Javed, {Muhammad Humza} and Xi Shen and Kim, {Jang Kyo}",

note = "Funding Information: This project was financially supported by the Research Grants Council (GRF projects: 16209917, 16205517, and 16200720) and Innovation and Technology Commission (ITS/012/19) of Hong Kong SAR. EK is a recipient of the Asian Future Leaders Scholarship. Technical assistance from the Advanced Engineering Materials facilities (AEMF) and the Materials Characterization and Preparation Facilities (MCPF) is appreciated. Funding Information: This project was financially supported by the Research Grants Council (GRF projects: 16209917, 16205517, and 16200720) and Innovation and Technology Commission (ITS/012/19) of Hong Kong SAR. EK is a recipient of the Asian Future Leaders Scholarship. Technical assistance from the Advanced Engineering Materials facilities (AEMF) and the Materials Characterization and Preparation Facilities (MCPF) is appreciated. Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

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doi = "10.1016/j.compositesa.2021.106430",

language = "British English",

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journal = "Composites Part A: Applied Science and Manufacturing",

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AU - Kim, Eunyoung

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AU - Lee, Jeng Hun

AU - Chen, Haomin

AU - Zhang, Heng

AU - Javed, Muhammad Humza

AU - Shen, Xi

AU - Kim, Jang Kyo

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PY - 2021/8

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N2 - Lightweight electromagnetic interference (EMI) shielding and impact attenuating materials are vital to protect delicate components in portable electronics. While conductive foams are intriguing for lightweight EMI shielding, their impact attenuating properties remain unexplored. Herein, a MXene/auxetic polyurethane (MX/APU) composite foam is developed for multifunctional EMI shielding and impact attenuation. The MX/APU composite presents a superior EMI shielding effectiveness (SE) of 76.2 dB, 31.2% higher than its non-auxetic counterpart at the same density owing to the larger specific surface area arising from the auxetic structure. Given its ultralow density of 0.063 g cm−3, it yields a specific SE of 1210 dB cm3 g−1, placing it among the best candidates for lightweight applications. The negative Poisson's ratio of MX/APU composite foam also delivers multifunctionalities of impact attenuation, reducing the peak force by 51.4% compared to a non-auxetic foam. This work provides a conceptually new approach to design lightweight multifunctional materials using auxetic structures.

AB - Lightweight electromagnetic interference (EMI) shielding and impact attenuating materials are vital to protect delicate components in portable electronics. While conductive foams are intriguing for lightweight EMI shielding, their impact attenuating properties remain unexplored. Herein, a MXene/auxetic polyurethane (MX/APU) composite foam is developed for multifunctional EMI shielding and impact attenuation. The MX/APU composite presents a superior EMI shielding effectiveness (SE) of 76.2 dB, 31.2% higher than its non-auxetic counterpart at the same density owing to the larger specific surface area arising from the auxetic structure. Given its ultralow density of 0.063 g cm−3, it yields a specific SE of 1210 dB cm3 g−1, placing it among the best candidates for lightweight applications. The negative Poisson's ratio of MX/APU composite foam also delivers multifunctionalities of impact attenuation, reducing the peak force by 51.4% compared to a non-auxetic foam. This work provides a conceptually new approach to design lightweight multifunctional materials using auxetic structures.

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M3 - Article

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SN - 1359-835X

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JO - Composites Part A: Applied Science and Manufacturing

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M1 - 106430

ER -

MXene/polyurethane auxetic composite foam for electromagnetic interference shielding and impact attenuation

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Keywords

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