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      High-Efficiency Electromagnetic Interference Shielding of rGO@FeNi/Epoxy Composites with Regular Honeycomb Structures

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          Highlights

          • The rGH@FeNi/epoxy electromagnetic interference (EMI) shielding composites with regular 3D honeycomb structures were prepared by sacrificial template, freeze-drying and vacuum-assisted impregnation of epoxy resin.

          • The construction of 3D honeycomb structure and electromagnetic synergistic effect significantly increase the EMI shielding effectiveness and reduce the secondary contamination.

          • The rGH@FeNi/epoxy composites possess excellent thermal stability and mechanical properties.

          Supplementary Information

          The online version contains supplementary material available at 10.1007/s40820-022-00798-5.

          Abstract

          With the rapid development of fifth-generation mobile communication technology and wearable electronic devices, electromagnetic interference and radiation pollution caused by electromagnetic waves have attracted worldwide attention. Therefore, the design and development of highly efficient EMI shielding materials are of great importance. In this work, the three-dimensional graphene oxide (GO) with regular honeycomb structure (GH) is firstly constructed by sacrificial template and freeze-drying methods. Then, the amino functionalized FeNi alloy particles ( f-FeNi) are loaded on the GH skeleton followed by in-situ reduction to prepare rGH@FeNi aerogel. Finally, the rGH@FeNi/epoxy EMI shielding composites with regular honeycomb structure is obtained by vacuum-assisted impregnation of epoxy resin. Benefitting from the construction of regular honeycomb structure and electromagnetic synergistic effect, the rGH@FeNi/epoxy composites with a low rGH@FeNi mass fraction of 2.1 wt% (rGH and f-FeNi are 1.2 and 0.9 wt%, respectively) exhibit a high EMI shielding effectiveness (EMI SE) of 46 dB, which is 5.8 times of that (8 dB) for rGO/FeNi/epoxy composites with the same rGO/FeNi mass fraction. At the same time, the rGH@FeNi/epoxy composites also possess excellent thermal stability (heat-resistance index and temperature at the maximum decomposition rate are 179.1 and 389.0 °C respectively) and mechanical properties (storage modulus is 8296.2 MPa).

          Supplementary Information

          The online version contains supplementary material available at 10.1007/s40820-022-00798-5.

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          2D metal carbides and nitrides (MXenes) for energy storage

          Babak Anasori, Maria R. Lukatskaya, Yury Gogotsi (2017)
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            Three-dimensional flexible and conductive interconnected graphene networks grown by chemical vapour deposition.

            Zongping Chen, Wencai Ren, Libo Gao … (2011)
            Integration of individual two-dimensional graphene sheets into macroscopic structures is essential for the application of graphene. A series of graphene-based composites and macroscopic structures have been recently fabricated using chemically derived graphene sheets. However, these composites and structures suffer from poor electrical conductivity because of the low quality and/or high inter-sheet junction contact resistance of the chemically derived graphene sheets. Here we report the direct synthesis of three-dimensional foam-like graphene macrostructures, which we call graphene foams (GFs), by template-directed chemical vapour deposition. A GF consists of an interconnected flexible network of graphene as the fast transport channel of charge carriers for high electrical conductivity. Even with a GF loading as low as ∼0.5 wt%, GF/poly(dimethyl siloxane) composites show a very high electrical conductivity of ∼10 S cm(-1), which is ∼6 orders of magnitude higher than chemically derived graphene-based composites. Using this unique network structure and the outstanding electrical and mechanical properties of GFs, as an example, we demonstrate the great potential of GF/poly(dimethyl siloxane) composites for flexible, foldable and stretchable conductors. © 2011 Macmillan Publishers Limited. All rights reserved
            Article 0 comments Cited 1018 times – based on 0 reviews     Review now
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              Structured Reduced Graphene Oxide/Polymer Composites for Ultra-Efficient Electromagnetic Interference Shielding

              Ding-Xiang Yan, Bo Li, Robert Vajtai … (2015)
              Article 0 comments Cited 279 times – based on 0 reviews     Review now
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                Author and article information

                Contributors
                Zhonglei Ma: mazl@nwpu.edu.cn
                Junwei Gu: gjw@nwpu.edu.cn , nwpugjw@163.com
                Journal
                Journal ID (nlm-ta): Nanomicro Lett
                Journal ID (iso-abbrev): Nanomicro Lett
                Title: Nano-Micro Letters
                Publisher: Springer Singapore (Singapore )
                ISSN (Print): 2311-6706
                ISSN (Electronic): 2150-5551
                Publication date (Electronic): 27 January 2022
                Publication date PMC-release: 27 January 2022
                Publication date Collection: December 2022
                Volume: 14
                Electronic Location Identifier: 51
                Affiliations
                [1 ]GRID grid.440588.5, ISNI 0000 0001 0307 1240, Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, , Northwestern Polytechnical University, ; Xi’an, 710072 People’s Republic of China
                [2 ]GRID grid.440588.5, ISNI 0000 0001 0307 1240, Queen Mary University of London Engineering School, Northwestern Polytechnical University, ; Xi’an, 710072 People’s Republic of China
                Article
                Publisher ID: 798
                DOI: 10.1007/s40820-022-00798-5
                PMC ID: 8795265
                PubMed ID: 35084576
                SO-VID: 95504377-1ded-4398-a0a5-daf1f8d5d3e9
                Copyright © © The Author(s) 2022
                License:

                Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

                History
                Date received : 6 December 2021
                Date accepted : 30 December 2021
                Funding
                Funded by: Shanghai Jiao Tong University
                Open Access :

                Open access funding provided by Shanghai Jiao Tong University.

                Categories
                Subject: Article
                Custom metadata
                issue-copyright-statement © The Author(s) 2022

                Keywords: electromagnetic interference shielding,rgo@feni,epoxy resins,honeycomb structures
                Data availability:
                Keywords: electromagnetic interference shielding, rgo@feni, epoxy resins, honeycomb structures

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