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Open AccessArticle

Highly Conductive PDMS Composite Mechanically Enhanced with 3D-Graphene Network for High-Performance EMI Shielding Application

1
School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
2
School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China
3
School of Materials Science and Engineering, University of New South Wales, Sydney 2052, Australia
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(4), 768; https://doi.org/10.3390/nano10040768
Received: 3 March 2020 / Revised: 31 March 2020 / Accepted: 2 April 2020 / Published: 16 April 2020
(This article belongs to the Section Nanocomposite Thin Films and 2D Materials)
A highly conductive three-dimensional (3D) graphene network (GN) was fabricated by chemical vapor deposition on a 3D nickel fiber network and subsequent etching process. Then a lightweight and flexible polydimethylsiloxane (PDMS)/GN composite was prepared by a vacuum infiltration method by using the graphene network as a template. The composite showed the superior electrical conductivity of 6100 S/m even at a very low loading level of graphene (1.2 wt %). As a result, an outstanding electromagnetic interference (EMI) shielding effectiveness (SE) of around 40 and 90 dB can be achieved in the X-band at thicknesses of 0.25 and 0.75 mm, respectively, which are much higher than most of the conductive polymers filled with carbon. The 3D graphene network can also act as a mechanical enhancer for PDMS. With a loading level of 1.2 wt %, the composite shows a significant increase by 256% in tensile strength. View Full-Text
Keywords: 3D graphene network; high electrical conductivity; PDMS composite; EMI SE 3D graphene network; high electrical conductivity; PDMS composite; EMI SE
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MDPI and ACS Style

Ao, D.; Tang, Y.; Xu, X.; Xiang, X.; Yu, J.; Li, S.; Zu, X. Highly Conductive PDMS Composite Mechanically Enhanced with 3D-Graphene Network for High-Performance EMI Shielding Application. Nanomaterials 2020, 10, 768.

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