Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/138199
Title: Engineering of high-density thin-layer graphite foam-based composite architectures with superior compressibility and excellent electromagnetic interference shielding performance
Authors: Li, Hongling
Jing, Lin
Ngoh, Zhi Lin
Tay, Roland Yingjie
Lin, Jinjun
Wang, Hong
Tsang, Siu Hon
Teo, Edwin Hang Tong
Keywords: Engineering::Materials
Issue Date: 2018
Source: 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
Journal: ACS Applied Materials & Interfaces
Abstract: 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.
URI: https://hdl.handle.net/10356/138199
ISSN: 1944-8244
DOI: 10.1021/acsami.8b15240
Rights: 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
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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