Construction of interconnected and oriented graphene nanosheets networks in cellulose aerogel film for high-efficiency electromagnetic interference shielding

Guo, Zhengzheng; Ren, Penggang; Dai, Zhong; Zong, Ze; Zhang, Fudong; Jin, Yanling; Ren, Fangfang

doi:10.1007/s10570-021-03722-z

Cited by 33 publications

(22 citation statements)

References 58 publications

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“…This is because the Fe 3 O 4 particles cause the composites to have more magnetic field interactions with natural resonance, exchange resonance, and eddy currents [ 41 , 42 ]. Additionally, the addition of Fe 3 O 4 can enhance the interface polarization relaxation between the fillers and the rubber matrix, which increases the transmission path of electromagnetic waves between composite materials, consequently increasing the possibility of the attenuation of incident waves [ 43 , 44 , 45 ]. In terms of the EMI shielding mechanism, it is the absorption efficiency, not the reflection efficiency, that contributes more to the EMI SE of the MGNR composites, absorbing most of the electromagnetic radiation that is then dissipated in the form of heat [ 17 ].…”

Section: Resultsmentioning

confidence: 99%

Constructing a Segregated Magnetic Graphene Network in Rubber Composites for Integrating Electromagnetic Interference Shielding Stability and Multi-Sensing Performance

et al. 2021

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A flexible, wearable electronic device composed of magnetic iron oxide (Fe3O4)/reduced graphene oxide/natural rubber (MGNR) composites with a segregated network was prepared by electrostatic self-assembly, latex mixing, and in situ reduction. The segregated network offers the composites higher electrical conductivity and more reliable sensing properties. Moreover, the addi-tion of Fe3O4 provides the composites with better electromagnetic interference shielding effectiveness (EMI SE). The EMI shielding property of MGNR composites is more stable under tensile deformation and long-term cycling conditions and has a higher sensitivity to stretch strain compared with the same structure made from reduced graphene oxide/natural rubber (GNR) composites. The EMI SE value of MGNR composites reduces by no more than 2.9% under different tensile permanent deformation, cyclic stretching, and cyclic bending conditions, while that of GNR composites reduces by approximately 16% in the worst case. Additionally, the MGNR composites have a better sensing performance and can maintain stable signals, even in the case of cyclic stretching with a very small strain (0.05%). Furthermore, they can steadily monitor the changes in resistance signals in various human motions such as finger bending, wrist bending, speaking, smiling, and blinking, indicating that the MGNR composites can be used in future wearable electronic flexibility devices.

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Section: Resultsmentioning

confidence: 99%

Constructing a Segregated Magnetic Graphene Network in Rubber Composites for Integrating Electromagnetic Interference Shielding Stability and Multi-Sensing Performance

et al. 2021

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“…Another study showed enhanced conductivity and electromagnetic shielding performance by the deposition of MXene on cellulose filter paper via vacuum‐assisted filtration. [ 84 ] Due to the formation of oriented MXene layers on the cellulose filter paper, maximum conductivity and electromagnetic shielding of 240.1 S m −1 and 29.3 dB, respectively, were observed for 0.192 mm material thickness at MXene content of 0.72 vol%. Guo et al.…”

Section: Applicationsmentioning

confidence: 99%

Cellulose‐Based Sustainable Composites: A Review of Systems for Applications in EMI Shielding and Sensors

Gebrekrstos

Orasugh

Muzata

et al. 2022

Macro Materials & Eng

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Advanced functional materials that are highly efficient in shielding electromagnetic radiation and sensing applications are primarily lightweight polymeric materials. In recent years, several research works on the development of polymer‐based sensors and electromagnetic interference (EMI) shielding materials have been reported. Cellulosic materials are extensively investigated for fabricating EMI shielding gadgets and sensors. Cellulose is a naturally abundant renewable polymeric material, and the EMI shielding, and sensing performances of cellulose‐based materials depend on their conductive network architecture. Incorporating conducting nanofillers can improve the conductivity of the cellulose matrix in composites. However, a comprehensive understanding of the electrical response of nanofillers in cellulose‐based composites is necessary for the design of EMI shielding materials and sensor devices. Therefore, this work provides a critical overview of the types of processing methods used, an insight into the effects of incorporating conductive nanofillers on the architectural structure of cellulose, and the obtained shielding and sensing properties of the cellulose‐based composites. This article is expected to provide guidelines for developing sustainable polymer materials for advanced applications in the future.

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“…13,17 As an EMI shielding material, interestingly, few studies have reported on the EMI shielding properties of pure graphene or rGO films with 100 wt % graphene with the minimum value of EMI SE for practical applications (20−40 dB). 16,25,26 An ultrathin flexible graphene film with an EMI SE of 73.7 dB was recently reported, 27 the best result so far, but its preparation includes the mechanical compression of four layers of porous graphene films, after their thermal reduction, to achieve such a performance. As such, with our work, we intend to demonstrate that with a single step of reduction of GO, it is possible to obtain an rGO freestanding film with an exceptional EMI shielding performance, and no additional procedures consisting of mechanical compression, 28,29 chemical strategies like etching 30 or doping, 31,32 or metal-coating 33 are needed.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Interference Shielding by Reduced Graphene Oxide Foils

Oliveira

Bouša

Sofer

et al. 2022

ACS Appl. Nano Mater.

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The pursuit of materials to avoid problems associated with electromagnetic pollution has become a relevant research topic. Here, we report the exceptional electromagnetic interference (EMI) shielding performance of freestanding reduced graphene oxide (rGO) foil produced by thermal reduction of graphene oxide (GO). The rGO foil with a thickness of 93.1 ± 12.4 μm reaches an efficient EMI shielding effectiveness (SE) value of 61.6 dB at 12.4 GHz. The excellent performance of the rGO foil is attributed to the thermal reduction of the GO foil, which restores the electrically conductive network, resulting in the electrical conductivity of 1.17 × 104 S m–1. To obtain a more complete profile of the EMI shielding performance of the rGO foil, measurements are performed in G- and C-bands, thus becoming the first study on the EMI shielding performance of an rGO film on a broad frequency range beyond the so-called X-band. The material sustains an EMI shielding efficiency higher than 99.999% over the frequency bands investigated, greatly desired in a wide range of commercial applications in this field.

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Construction of interconnected and oriented graphene nanosheets networks in cellulose aerogel film for high-efficiency electromagnetic interference shielding

Cited by 33 publications

References 58 publications

Constructing a Segregated Magnetic Graphene Network in Rubber Composites for Integrating Electromagnetic Interference Shielding Stability and Multi-Sensing Performance

Constructing a Segregated Magnetic Graphene Network in Rubber Composites for Integrating Electromagnetic Interference Shielding Stability and Multi-Sensing Performance

Cellulose‐Based Sustainable Composites: A Review of Systems for Applications in EMI Shielding and Sensors

Electromagnetic Interference Shielding by Reduced Graphene Oxide Foils

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