Engineering of high-density thin-layer graphite foam-based composite architectures with superior compressibility and excellent electromagnetic interference shielding performance

Three-dimensional (3D) graphene architectures with well-controlled structure and excellent physiochemical properties have attracted considerable interest due to their potential applications in flexible electronic devices. However, the majority of the existing 3D graphene still encounters several dra...

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Main Authors: Li, Hongling, Jing, Lin, Ngoh, Zhi Lin, Tay, Roland Yingjie, Lin, Jinjun, Wang, Hong, Tsang, Siu Hon, Teo, Edwin Hang Tong
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/138199
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1381992021-05-01T20:12:59Z Engineering of high-density thin-layer graphite foam-based composite architectures with superior compressibility and excellent electromagnetic interference shielding performance Li, Hongling Jing, Lin Ngoh, Zhi Lin Tay, Roland Yingjie Lin, Jinjun Wang, Hong Tsang, Siu Hon Teo, Edwin Hang Tong School of Electrical and Electronic Engineering School of Materials Science & Engineering CNRS International-NTU-Thales Research Alliance Temasek Laboratories Engineering::Materials Thin-layer Graphite Foam GF@PDMS Three-dimensional (3D) graphene architectures with well-controlled structure and excellent physiochemical properties have attracted considerable interest due to their potential applications in flexible electronic devices. However, the majority of the existing 3D graphene still encounters several drawbacks such as brittleness, non-uniform building units, and limited scale (millimeter or even micrometer), which severely limits its practical applications. Herein, we demonstrate a new scalable technique for the preparation of thin-layer graphite foam (GF) with controllable densities (27.2-69.2 mg cm-3) by carbonization of polyacrylonitrile using a template-directed thermal annealing approach. By integrating the GF with poly(dimethylsiloxane) (PDMS), macroscopic porous GF@PDMS with variable thin-layer GF contents ranging from 15.9 to 31.7% was further fabricated. Owing to the robust interconnected porous network of the GF and the synergistic effect between GF and PDMS, GF@PDMS with a 15.9% thin-layer GF content exhibited an impressive 254% increase in compressive strength over the bare GF. In addition, such 15.9% GF@PDMS can totally recover after the first compression cycle at a 95% strain and maintain ∼88% recovery even after 1000 compression cycles at an 80% strain, demonstrating its superior compressibility. Moreover, all of the as-prepared GF@PDMS samples possessed high electrical conductivity (up to 34.3 S m-1), relatively low thermal conductivity (0.062-0.076 W m-1 K-1), and excellent electromagnetic interference shielding effectiveness (up to 36.1 dB) over a broad frequency range of 8.2-18 GHz, indicating their great potential as promising candidates for high-performance electromagnetic wave absorption in flexible electronic devices. Accepted version 2020-04-29T01:50:30Z 2020-04-29T01:50:30Z 2018 Journal Article Li, H., Lin, J., Ngoh, Z. L., Tay, R. Y., Lin, J., Wang, H., . . . Teo, E. H. T. (2018). Engineering of high-density thin-layer graphite foam-based composite architectures with superior compressibility and excellent electromagnetic interference shielding performance. ACS Applied Materials & Interfaces, 10(48), 41707-41716. doi:10.1021/acsami.8b15240 1944-8244 https://hdl.handle.net/10356/138199 10.1021/acsami.8b15240 30403340 2-s2.0-85056907715 48 10 41707 41716 en ACS Applied Materials & Interfaces This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsami.8b15240 application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials
Thin-layer Graphite Foam
GF@PDMS
spellingShingle Engineering::Materials
Thin-layer Graphite Foam
GF@PDMS
Li, Hongling
Jing, Lin
Ngoh, Zhi Lin
Tay, Roland Yingjie
Lin, Jinjun
Wang, Hong
Tsang, Siu Hon
Teo, Edwin Hang Tong
Engineering of high-density thin-layer graphite foam-based composite architectures with superior compressibility and excellent electromagnetic interference shielding performance
description Three-dimensional (3D) graphene architectures with well-controlled structure and excellent physiochemical properties have attracted considerable interest due to their potential applications in flexible electronic devices. However, the majority of the existing 3D graphene still encounters several drawbacks such as brittleness, non-uniform building units, and limited scale (millimeter or even micrometer), which severely limits its practical applications. Herein, we demonstrate a new scalable technique for the preparation of thin-layer graphite foam (GF) with controllable densities (27.2-69.2 mg cm-3) by carbonization of polyacrylonitrile using a template-directed thermal annealing approach. By integrating the GF with poly(dimethylsiloxane) (PDMS), macroscopic porous GF@PDMS with variable thin-layer GF contents ranging from 15.9 to 31.7% was further fabricated. Owing to the robust interconnected porous network of the GF and the synergistic effect between GF and PDMS, GF@PDMS with a 15.9% thin-layer GF content exhibited an impressive 254% increase in compressive strength over the bare GF. In addition, such 15.9% GF@PDMS can totally recover after the first compression cycle at a 95% strain and maintain ∼88% recovery even after 1000 compression cycles at an 80% strain, demonstrating its superior compressibility. Moreover, all of the as-prepared GF@PDMS samples possessed high electrical conductivity (up to 34.3 S m-1), relatively low thermal conductivity (0.062-0.076 W m-1 K-1), and excellent electromagnetic interference shielding effectiveness (up to 36.1 dB) over a broad frequency range of 8.2-18 GHz, indicating their great potential as promising candidates for high-performance electromagnetic wave absorption in flexible electronic devices.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Li, Hongling
Jing, Lin
Ngoh, Zhi Lin
Tay, Roland Yingjie
Lin, Jinjun
Wang, Hong
Tsang, Siu Hon
Teo, Edwin Hang Tong
format Article
author Li, Hongling
Jing, Lin
Ngoh, Zhi Lin
Tay, Roland Yingjie
Lin, Jinjun
Wang, Hong
Tsang, Siu Hon
Teo, Edwin Hang Tong
author_sort Li, Hongling
title Engineering of high-density thin-layer graphite foam-based composite architectures with superior compressibility and excellent electromagnetic interference shielding performance
title_short Engineering of high-density thin-layer graphite foam-based composite architectures with superior compressibility and excellent electromagnetic interference shielding performance
title_full Engineering of high-density thin-layer graphite foam-based composite architectures with superior compressibility and excellent electromagnetic interference shielding performance
title_fullStr Engineering of high-density thin-layer graphite foam-based composite architectures with superior compressibility and excellent electromagnetic interference shielding performance
title_full_unstemmed Engineering of high-density thin-layer graphite foam-based composite architectures with superior compressibility and excellent electromagnetic interference shielding performance
title_sort engineering of high-density thin-layer graphite foam-based composite architectures with superior compressibility and excellent electromagnetic interference shielding performance
publishDate 2020
url https://hdl.handle.net/10356/138199
_version_ 1699245882804797440