Lightweight and Anisotropic Porous MWCNT/WPU Composites for Ultrahigh Performance Electromagnetic Interference Shielding

Zhihui Zeng; Hao Jin; Mingji Chen; Weiwei Li; Licheng Zhou; Zhong Zhang

doi:10.1002/adfm.201503579

Lightweight and Anisotropic Porous MWCNT/WPU Composites for Ultrahigh Performance Electromagnetic Interference Shielding

Zhihui Zeng
, Hao Jin^*
, Mingji Chen
, Weiwei Li
, Licheng Zhou
, Zhong Zhang

^*Corresponding author for this work

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

800 Citations (Scopus)

Abstract

Lightweight, flexible and anisotropic porous multiwalled carbon nanotube (MWCNT)/water-borne polyurethane (WPU) composites are assembled by a facile freeze-drying method. The composites contain extremely wide range of MWCNT mass ratios and show giant electromagnetic interference (EMI) shielding effectiveness (SE) which exceeds 50 or 20 dB in the X-band while the density is merely 126 or 20 mg cm^-3, respectively. The relevant specific SE is up to 1148 dB cm³ g^-1, greater than those of other shielding materials ever reported. The ultrahigh EMI shielding performance is attributed to the conductivity of the cell walls caused by MWCNT content, the anisotropic porous structures, and the polarization between MWCNT and WPU matrix. In addition to the enhanced electrical properties, the composites also indicate enhanced mechanical properties compared with porous WPU and CNT architectures.

Original language	English
Pages (from-to)	303-310
Number of pages	8
Journal	Advanced Functional Materials
Volume	26
Issue number	2
DOIs	https://doi.org/10.1002/adfm.201503579
Publication status	Published - 13 Jan 2016
Externally published	Yes

Keywords

anisotropic porous
electromagnetic interference (EMI) shielding
lightweight
multiwalled carbon nanotube (MWCNT)
nanocomposites

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10.1002/adfm.201503579

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title = "Lightweight and Anisotropic Porous MWCNT/WPU Composites for Ultrahigh Performance Electromagnetic Interference Shielding",

abstract = "Lightweight, flexible and anisotropic porous multiwalled carbon nanotube (MWCNT)/water-borne polyurethane (WPU) composites are assembled by a facile freeze-drying method. The composites contain extremely wide range of MWCNT mass ratios and show giant electromagnetic interference (EMI) shielding effectiveness (SE) which exceeds 50 or 20 dB in the X-band while the density is merely 126 or 20 mg cm-3, respectively. The relevant specific SE is up to 1148 dB cm3 g-1, greater than those of other shielding materials ever reported. The ultrahigh EMI shielding performance is attributed to the conductivity of the cell walls caused by MWCNT content, the anisotropic porous structures, and the polarization between MWCNT and WPU matrix. In addition to the enhanced electrical properties, the composites also indicate enhanced mechanical properties compared with porous WPU and CNT architectures.",

keywords = "anisotropic porous, electromagnetic interference (EMI) shielding, lightweight, multiwalled carbon nanotube (MWCNT), nanocomposites",

author = "Zhihui Zeng and Hao Jin and Mingji Chen and Weiwei Li and Licheng Zhou and Zhong Zhang",

note = "Publisher Copyright: {\textcopyright} 2015 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim.",

year = "2016",

month = jan,

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doi = "10.1002/adfm.201503579",

language = "English",

volume = "26",

pages = "303--310",

journal = "Advanced Functional Materials",

issn = "1616-301X",

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TY - JOUR

T1 - Lightweight and Anisotropic Porous MWCNT/WPU Composites for Ultrahigh Performance Electromagnetic Interference Shielding

AU - Zeng, Zhihui

AU - Jin, Hao

AU - Chen, Mingji

AU - Li, Weiwei

AU - Zhou, Licheng

AU - Zhang, Zhong

PY - 2016/1/13

Y1 - 2016/1/13

N2 - Lightweight, flexible and anisotropic porous multiwalled carbon nanotube (MWCNT)/water-borne polyurethane (WPU) composites are assembled by a facile freeze-drying method. The composites contain extremely wide range of MWCNT mass ratios and show giant electromagnetic interference (EMI) shielding effectiveness (SE) which exceeds 50 or 20 dB in the X-band while the density is merely 126 or 20 mg cm-3, respectively. The relevant specific SE is up to 1148 dB cm3 g-1, greater than those of other shielding materials ever reported. The ultrahigh EMI shielding performance is attributed to the conductivity of the cell walls caused by MWCNT content, the anisotropic porous structures, and the polarization between MWCNT and WPU matrix. In addition to the enhanced electrical properties, the composites also indicate enhanced mechanical properties compared with porous WPU and CNT architectures.

AB - Lightweight, flexible and anisotropic porous multiwalled carbon nanotube (MWCNT)/water-borne polyurethane (WPU) composites are assembled by a facile freeze-drying method. The composites contain extremely wide range of MWCNT mass ratios and show giant electromagnetic interference (EMI) shielding effectiveness (SE) which exceeds 50 or 20 dB in the X-band while the density is merely 126 or 20 mg cm-3, respectively. The relevant specific SE is up to 1148 dB cm3 g-1, greater than those of other shielding materials ever reported. The ultrahigh EMI shielding performance is attributed to the conductivity of the cell walls caused by MWCNT content, the anisotropic porous structures, and the polarization between MWCNT and WPU matrix. In addition to the enhanced electrical properties, the composites also indicate enhanced mechanical properties compared with porous WPU and CNT architectures.

KW - anisotropic porous

KW - electromagnetic interference (EMI) shielding

KW - lightweight

KW - multiwalled carbon nanotube (MWCNT)

KW - nanocomposites

UR - https://www.scopus.com/pages/publications/84954077787

U2 - 10.1002/adfm.201503579

DO - 10.1002/adfm.201503579

M3 - Article

AN - SCOPUS:84954077787

SN - 1616-301X

VL - 26

SP - 303

EP - 310

JO - Advanced Functional Materials

JF - Advanced Functional Materials

IS - 2

ER -

Lightweight and Anisotropic Porous MWCNT/WPU Composites for Ultrahigh Performance Electromagnetic Interference Shielding

Abstract

Keywords

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