Highly flexible and ultra-thin Ni-plated carbon-fabric/polycarbonate film for enhanced electromagnetic interference shielding

Xing, Di; Lu, Longsheng; Teh, Kwok Siong; Wan, Zhenping; Xie, Yingxi; Tang, Yong

doi:10.1016/j.carbon.2018.02.001

Cited by 120 publications

(52 citation statements)

References 43 publications

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“…Specific shielding effectiveness (SSE), which was calculated by the formula

S S E = \frac{S E}{ρ t}

, where ρ is the mass density of sponges, and t is the thickness of sponge, was used as a criterion to evaluate these sponges. Due to low mass density of as‐prepared metal sponges, generally in the range of 0.028 to 0.03 g/cm 3 , high SSE of 7273 dB ⋅ cm 2 ⋅ g −1 can be attained in Ni−Co coated sponges, and is much better than many other similar foams/sponges (Figure i) . Obviously, as‐prepared magnetic metal coated melamine sponges with adjustable thickness and composition have shown controllable EMI shielding performance and ultrahigh SSE value through the optimized composition and processing parameter design, and should be able to find the applications for controllable electromagnetic wave attenuation.…”

Section: Resultsmentioning

confidence: 99%

“…Due to low mass density of as-prepared metal sponges, generally in the range of 0.028 to 0.03 g/cm 3 , high SSE of 7273 dB · cm 2 · g À 1 can be attained in NiÀ Co coated sponges, and is much better than many other similar foams/sponges (Figure 5i). [60][61][62][63][64][65][66][67][68][69][70][71][72][73][74] Obviously, as-prepared magnetic metal coated melamine sponges with adjustable thickness and composition have shown controllable EMI shielding performance and ultrahigh SSE value through the optimized composition and processing parameter design, and should be able to find the applications for controllable electromagnetic wave attenuation.…”

Section: Full Papermentioning

confidence: 99%

See 1 more Smart Citation

Compressible Metalized Soft Magnetic Sponges with Tailorable Electrical and Magnetic Properties

Xi¹,

Hu²,

Liu³

et al. 2020

ChemNanoMat

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Porous metallic sponge has shown enormous application potential in many fields including electrochemical electrode, catalysis, sensors, separation and purification, microwave and sound inhibition, etc. In this paper, we described the preparation of a class of highly compressible NiÀ Co alloy-based sponges with tailorable conductivity and soft magnetic properties as well as EMI shielding ability by employing elastic porous melamine sponge as the support. The melamine sponge was first modified by one-step dopamine-triggered radical polymerization reaction, in which polymer brushes with quaternary ammonium cations were grafted onto the sponge fibers for the capture of negative catalyst moieties. The immobilized catalyst moieties could subsequently induce in-situ chemical deposition of a uniform and well-adhesive NiÀ Co alloy layer with controllable compositions and thickness on the fiber surface owing to the interpenetrating network between hydrophilic polymer brushes and the in-situ deposited metal layer. The obtained alloy sponges show good compression-resilience property, excellent conductivity and favorable soft magnetic performance as well as good compressive fatigue resistance during repeated compression-release cycles, and thus can find promising applications in many fields, including pressure resistance sensors, magnetic controlled pollutant absorbents, tunable EMI shielding materials, etc.

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“…Specific shielding effectiveness (SSE), which was calculated by the formula

S S E = \frac{S E}{ρ t}

Section: Resultsmentioning

confidence: 99%

Section: Full Papermentioning

confidence: 99%

Compressible Metalized Soft Magnetic Sponges with Tailorable Electrical and Magnetic Properties

Xi¹,

Hu²,

Liu³

et al. 2020

ChemNanoMat

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show abstract

“…The multireflection of EM waves between the Co/C nanocomposites could lead to continuous magnetic loss. The magnetic loss can efficiently enhance EM energy dissipation, increasing EMI shielding ability . The last rGO layer with stacked laminated structure play as the last ditch to further prevent the residuary EM waves pass through.…”

Section: Resultsmentioning

confidence: 99%

Flexible Composite Carbon Films Prepared by a Pancake‐Making Method for Electromagnetic Interference Shielding

Yang

Wei

et al. 2020

Adv Materials Inter

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resistance of carbon materials are perfect choices for electromagnetic interferences (EMI) shielding materials. [11][12][13][14] Therefore, flexible and preservative carbon films with excellent EMI shielding performance have been considered as promising substitutes for traditional metallic films.Carbon nanofibers and flexible graphite were employed to construct high-performance EMI shielding films at the early stage. [15] The EMI SE of flexible graphite can reach 130 dB at 1 GHz, [16] which is superior to almost all EMI shielding materials. Cao and co-workers prepared a flexible and lightweight (density < 0.1 g cm −3 )

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“…Furthermore, the employment of superhydrophobic treatment has a positive influence on the EMI SE. When composed of a higher density, the fabrics have a smaller porosity and greater EMI SE [30,31]. After the superhydrophobic treatment, the fabrics are enwrapped in transparent films that decrease the distance among fibers to a certain extent and thus strengthens the EMI SE of the conductive fabrics.…”

Section: Emi Shielding Effectiveness Of Conductive Fabricsmentioning

confidence: 99%

“…To further demonstrate the highly efficient EMI shielding of the conductive composite fabrics, the shielding effectiveness per unit volume (SSE) and specific SSE/t of the fabric based EMI shielding material are discussed in Figure 5d and Table 2 [31,32]. It can be found that the PSA-SS-1′ and PSA-SS-2′ superhydrophobic and conductive composite fabric in this study possesses a very high SSE/t (1623 dB•cm 2 /g and 1617 dB•cm 2 /g).…”

Section: Emi Shielding Effectiveness Of Conductive Fabricsmentioning

confidence: 99%

Superhydrophobic/Flame Retardant/EMI Shielding Fabrics: Manufacturing Techniques and Property Evaluations

Peng

Wang

et al. 2019

Applied Sciences

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Electromagnetic pollution interferes with electronic equipment in proximity and jeopardizes human health, which urges the development of electromagnetic interference (EMI) shielding materials. It is urgent to develop electromagnetic interference (EMI) shielding materials. However, the preparation of materials with superhydrophobicity, flame retardancy and EMI shielding properties is still challenging. In this study, we invented a core-spun yarn feeding device, which uses polysulfonamide (PSA) roving as a coating material and stainless steel wire as the core material to prepare a conductive core-spun yarn, which solves the problem of the wire having an easily exposed fabric surface. The finally prepared conductive fabric was subjected to Waterproof 2P hydrophobic treatment to form a superhydrophobic flame-retardant EMI shielding fabric. The results show that the hydrophobic treatment creates a thin film over the woven fabrics, and the contact angle of the fabric surface can reach 155°. The hydrophobic treatment will not damage the shielding effect and slightly increase the dB value. The average dB value of PSA-SS-1’ and PSA-SS-2’ are increased by 0.82 dB and 1.92 dB, respectively. When composed of conductive wrapped yarns for both the warp and weft yarns, the electromagnetic interference shielding effectiveness (EMI SE) of conductive fabrics is beyond 30 dB at 0–3000 MHz and the burnt depth is shorter than 40 mm. As for real applications, superhydrophobic/flame retardant/EMI SE fabrics can be used in a moist and complex environment with retaining conductivity and shielding effectiveness.

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Highly flexible and ultra-thin Ni-plated carbon-fabric/polycarbonate film for enhanced electromagnetic interference shielding

Cited by 120 publications

References 43 publications

Compressible Metalized Soft Magnetic Sponges with Tailorable Electrical and Magnetic Properties

Compressible Metalized Soft Magnetic Sponges with Tailorable Electrical and Magnetic Properties

Flexible Composite Carbon Films Prepared by a Pancake‐Making Method for Electromagnetic Interference Shielding

Superhydrophobic/Flame Retardant/EMI Shielding Fabrics: Manufacturing Techniques and Property Evaluations

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