Advances in Graphene–Polymer Nanocomposite Foams for Electromagnetic Interference Shielding

Sun, Jiaotong; Zhou, Dan

doi:10.3390/polym15153235

Cited by 9 publications

(2 citation statements)

References 64 publications

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“…Using modified polymer and nanocomposite can improve the overall material performance. Furthermore, the performances of polymer/graphene nanomaterials in EMI devices can be improved through altering the design and processing parameters of these materials [165].…”

Section: Value Of Graphene Nanocomposites In Emi Shieldingmentioning

confidence: 99%

Graphene Nanocomposites for Electromagnetic Interference Shielding—Trends and Advancements

Kausar,

Ahmad,

Zhao

et al. 2023

J. Compos. Sci.

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Electromagnetic interference is considered a serious threat to electrical devices, the environment, and human beings. In this regard, various shielding materials have been developed and investigated. Graphene is a two-dimensional, one-atom-thick nanocarbon nanomaterial. It possesses several remarkable structural and physical features, including transparency, electron conductivity, heat stability, mechanical properties, etc. Consequently, it has been used as an effective reinforcement to enhance electrical conductivity, dielectric properties, permittivity, and electromagnetic interference shielding characteristics. This is an overview of the utilization and efficacy of state-of-the-art graphene-derived nanocomposites for radiation shielding. The polymeric matrices discussed here include conducting polymers, thermoplastic polymers, as well as thermosets, for which the physical and electromagnetic interference shielding characteristics depend upon polymer/graphene interactions and interface formation. Improved graphene dispersion has been observed due to electrostatic, van der Waals, π-π stacking, or covalent interactions in the matrix nanofiller. Accordingly, low percolation thresholds and excellent electrical conductivity have been achieved with nanocomposites, offering enhanced shielding performance. Graphene has been filled in matrices like polyaniline, polythiophene, poly(methyl methacrylate), polyethylene, epoxy, and other polymers for the formation of radiation shielding nanocomposites. This process has been shown to improve the electromagnetic radiation shielding effectiveness. The future of graphene-based nanocomposites in this field relies on the design and facile processing of novel nanocomposites, as well as overcoming the remaining challenges in this field.

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Section: Value Of Graphene Nanocomposites In Emi Shieldingmentioning

confidence: 99%

Graphene Nanocomposites for Electromagnetic Interference Shielding—Trends and Advancements

Kausar,

Ahmad,

Zhao

et al. 2023

J. Compos. Sci.

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“…With an increase in the thickness of carbon fiber paper, there is a corresponding increase in the number of carbon fibers per unit area, resulting in the construction of more conductive paths within the material and ultimately enhancing its conductivity. The electromagnetic shielding performance of the material is determined by its three-dimensional conductive network [ 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbon Fiber Paper with Thickness Gradient on Electromagnetic Shielding Performance of X-Band

Liu,

Song,

Liang

et al. 2024

Materials

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Flexible paper-based materials play a crucial role in the field of flexible electromagnetic shielding due to their thinness and controllable shape. In this study, we employed the wet paper forming technique to prepare carbon fiber paper with a thickness gradient. The electromagnetic shielding performance of the carbon fiber paper varies with the ladder-like thickness distribution. Specifically, an increase in thickness gradient leads to higher reflectance of the carbon fiber paper. Within the X-band frequency range (8.2–12.4 GHz), reflectivity decreases as electromagnetic wave frequency increases, indicating enhanced penetration of electromagnetic waves into the interior of the carbon fiber paper. This enhancement is attributed to an increased fiber content per unit area resulting from a greater thickness gradient, which further enhances reflection loss and promotes internal multiple reflections and scattering effects, leading to increased absorption loss. Notably, at a 5 mm thickness, our carbon fiber paper exhibits an impressive average overall shielding performance, reaching 63.46 dB. Moreover, it exhibits notable air permeability and mechanical properties, thereby assuming a pivotal role in the realm of flexible wearable devices in the foreseeable future.

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Electrical behavior and water phase transformation in multi‐walled carbon nanotube/polytetrafluoroethylene composite films

Eom,

Shin,

Hong

et al. 2024

Polymer Composites

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Multi‐walled carbon nanotubes (MWCNTs) with excellent physiochemical properties have been recently applied to energy/power generation and storage systems encompassing polymer electrolyte membrane fuel cells (PEMFCs). However, there is a lack of investigations of the properties of MWCNT composites themselves under the actual operating conditions of systems. In this paper, MWCNTs/polytetrafluoroethylene (PTFE) composites were fabricated as electric and hydrophobic components for energy/power systems. The electrical properties, heating behavior, hydrophobicity, and water evaporation behavior of the composites are characterized within the operating voltage ranges of PEMFC. With 50% MWCNT content, the conductivity and the contact angle were 11.83 S/cm, and the contact angle 128.1°, respectively. The MWCNT/PTFE composite film showed a linear temperature rise with voltages and rapid temperature saturation within 40 s. The rate in the initial heating range was measured at 0.5°C/s for the voltage of 0.5 V. The voltage increase induced an exponential decrease in the height of water droplets on the composite surface. The evaporation rate increased almost 10‐fold, from 0.013 mm/min at 0.0 V to 0.12 mm/min at 1.0 V. The proposed characteristics of the functional composite provide insights into the material requirements for electrochemical devices, including PEMFC.Highlights Multi‐walled carbon nanotube/polytetrafluoroethylene composites can be applied to energy storage and power generation. Key properties of the composites are proposed for polymer electrolyte membrane fuel cell (PEMFC) operating conditions. The composite has a fast heating by high conductivity and temperature uniformity. Water‐vapor transformation under PEMFC operating voltage is quantified.

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Advances in Graphene–Polymer Nanocomposite Foams for Electromagnetic Interference Shielding

Cited by 9 publications

References 64 publications

Graphene Nanocomposites for Electromagnetic Interference Shielding—Trends and Advancements

Graphene Nanocomposites for Electromagnetic Interference Shielding—Trends and Advancements

Effect of Carbon Fiber Paper with Thickness Gradient on Electromagnetic Shielding Performance of X-Band

Electrical behavior and water phase transformation in multi‐walled carbon nanotube/polytetrafluoroethylene composite films

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