PET/Ag NW/PMMA transparent electromagnetic interference shielding films with high stability and flexibility

Zhu, Xingzhong; Guo, Aoqi; Yan, Zhiyang; Qin, Fangfang; Xu, Juan; Ji, Yanda; Kan, Caixia

doi:10.1039/d1nr00977j

Cited by 44 publications

(36 citation statements)

References 53 publications

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“…Ag NW-based composites were applied as one of the coatings to build a sandwich-like transparent film in Figure 5e,f. [50] Polymethyl methacrylate (PMMA) and PET were used as upper and lower coatings of sandwich-like material, respectively. The EMI SE was 21.3 dB in 8-12 GHz with a density of 90 mg m À2 .…”

Section: Light Fieldmentioning

confidence: 99%

Section: Light Fieldmentioning

confidence: 99%

“…Copyright 2021, IOP Publishing, Ltd. e-f ) Digital photograph of the PET/Ag NW/PMMA flexible transparent conductive films. Reproduced with permission [50]. Copyright 2021, Royal Society of Chemistry.…”

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confidence: 99%

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A Novel Strategy in Electromagnetic Wave Absorbing and Shielding Materials Design: Multi‐Responsive Field Effect

et al. 2021

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With the rapid development of 5th Generation Mobile Communication Technology (5G), late-model electromagnetic wave absorbing and shielding (EMAS) materials have proven to be the research emphasis of electromagnetic (EM) wave shelter. Great efforts have been made to optimize EMAS functional materials for diverse EM wavebands. [1] Each range of EM wave bands has a specific application in communication, electrical engineering, or information transmission. [2] For instance, ultrahigh frequency (UHF) EM wave of 0.3 < f < 3 GHz, also known as P/L/S or B/C/D/E band, is applied to television radar air navigation and mobile communication as well as microwave relay systems; the superhigh frequency (SHF) EM wave of 3 < f < 30 GHz, including S/C/X/Ku/K/ Ka-band or F/G/H/I/J/K band, is customarily adopted in digital telecommunication and satellite communication as well as waveguide communication. Moreover, EM waves in other frequency ranges, like terahertz wave and gamma ray, have been widely used in label-free DNA detection, high-temperature superconducting material research, radiographic testing, and even oncotherapy. In these cases, each specific application scenario requires specific EM waves in a specific frequency range, illustrating that EM wave clutters should be absorbed or otherwise shielded. Under these circumstances, developing novel and practical EMAS materials may meet the demands of EM wave science, especially in multifunctional fields.Traditional EMAS materials consist of resistance absorber, [3] dielectric absorber, [4] magnetic medium absorber, [5] and composites based on monomaterials as mentioned earlier, [6] including CuS, [7] MoSe 2 , [8] ferrites and alloys (Co x Fe 3Àx O 4 @C), [9] modified carbons (hollow carbon spheres), [10] etc. In the past decade, 2D transition metal carbides or nitrides, or MXenes, have been prefabricated and naturally applied to EMAS materials synthesis due to their outstanding EM wave loss capacity. [11] Many scholars have devoted themselves to MXene materials and structure design. The electrical conductivity of MXenes can reach 10 3 S cm À1 , leading to extraordinary EM wave shielding property. [12] Many reported MXene absorbers are monolayers, [13] whereas macrostructure design is introduced. Thus, macrodevices, like hollow MXene sphere foam, [14] are synthesized. It is

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Section: Light Fieldmentioning

confidence: 99%

Section: Light Fieldmentioning

confidence: 99%

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A Novel Strategy in Electromagnetic Wave Absorbing and Shielding Materials Design: Multi‐Responsive Field Effect

et al. 2021

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“…The best balance between optical transparency and shielding is metallic micro and nanostructures. In the context of transparent, high-performance coatings with SE more than 30 dB, it is advisable to consider layers based on highly conductive metals, for example, Ag nanowires [12][13][14][15] and Cu nanowires [16]. Additional electroless deposition of Cu on Ag nanowire seed contributes to a dramatic increase in SE for a wide frequency range [17].…”

Section: Introductionmentioning

confidence: 99%

Low Cost Embedded Copper Mesh Based on Cracked Template for Highly Durability Transparent EMI Shielding Films

et al. 2022

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Embedded copper mesh coatings with low sheet resistance and high transparency were formed using a low-cost Cu seed mesh obtained with a magnetron sputtering on a cracked template, and subsequent operations electroplating and embedding in a photocurable resin layer. The influence of the mesh size on the optoelectric characteristics and the electromagnetic shielding efficiency in a wide frequency range is considered. In optimizing the coating properties, a shielding efficiency of 49.38 dB at a frequency of 1 GHz, with integral optical transparency in the visible range of 84.3%, was obtained. Embedded Cu meshes have been shown to be highly bending stable and have excellent adhesion strength. The combination of properties and economic costs for the formation of coatings indicates their high prospects for practical use in shielding transparent objects, such as windows and computer monitors.

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“…[3,13] Specifically, traditional polymers, such as polyimide (PI), polystyrene (PS), epoxy, and polyethylene terephthalate (PET), offer a proper framework because of their collective characteristics, including low dielectric constant, excellent physical/chemical properties, and easy processability. [14][15][16] Of these, PI, which has hightemperature resistance (>400 °C), low-temperature tolerance (<−270 °C), outstanding mechanical properties, chemical resistance, flexibility, and excellent dielectric properties (ε r < 3.4), is highly desirable as a framework. [17] Apparently, the absorbent (lossy materials) is a key component of attenuating EMW in absorption composite films, depending on dielectric loss, magnetic loss, and multiple scattering.…”

mentioning

confidence: 99%

A Flexible, Mechanically Strong, and Anti‐Corrosion Electromagnetic Wave Absorption Composite Film with Periodic Electroconductive Patterns

Zhao

Lan

Zhang

et al. 2021

Adv Funct Materials

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Demand for high-efficiency electromagnetic wave (EMW) absorption composite films continues to increase with technical advances in 5G telecommunications, wearable electronics, portable devices, and deployable military applications. However, realizing flexible ultra-thin single-layer EMW absorption composite films with multifunctionality, rather than using traditional particle absorbents, is a known challenge. In this study, the authors propose a series of polyimide (PI) reinforced composite films with periodic copperbased electroconductive units that possess tunable electrical properties for specific applications. These periodic units optimize the electric field distribution of the films in an alternating electromagnetic field, resulting in stronger power loss. Furthermore, the hierarchical structure and abundant heterogeneous interfaces of each unit contribute to multiple scattering and polarization loss. The obtained copper mesh@Cu 2−x S@PI (CCP) film shows excellent EM shielding performance (63.7 dB), while the Air@Cu 2−x S@PI (ACP) film delivers a superior specific absorbency value of 391.43% mm -1 in the X-band. Furthermore, owing to their mechanical properties, thermal conduction/dissipation performance, and excellent environmental stability characteristics, these films offer significant potential as high-performance EMW response materials with resistance to harsh conditions.

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PET/Ag NW/PMMA transparent electromagnetic interference shielding films with high stability and flexibility

Abstract: The flexible transparent electromagnetic interference (EMI) shielding materials in visual windows is essential for the innovation of optoelectronic devices. Herein, we demonstrate the fabrication of the flexible EMI shielding films...

Cited by 44 publications

References 53 publications

A Novel Strategy in Electromagnetic Wave Absorbing and Shielding Materials Design: Multi‐Responsive Field Effect

A Novel Strategy in Electromagnetic Wave Absorbing and Shielding Materials Design: Multi‐Responsive Field Effect

Low Cost Embedded Copper Mesh Based on Cracked Template for Highly Durability Transparent EMI Shielding Films

A Flexible, Mechanically Strong, and Anti‐Corrosion Electromagnetic Wave Absorption Composite Film with Periodic Electroconductive Patterns

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