Multilayer-structured Ni-Co-Fe-P/polyaniline/polyimide composite fabric for robust electromagnetic shielding with low reflection characteristic

Wang, Yu; Wang, Jiaqiang; Ding, Xiaodong

doi:10.1016/j.cej.2019.122553

Cited by 112 publications

(49 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The unique structural control can increase the multilayer reflection of electromagnetic waves in the material, thus enhancing the electromagnetic interference shielding performance. [2,[81][82][83][84] Different electromagnetic interference shielding requirements can be achieved by introducing multiple loss mechanisms between different layers.…”

Section: Layered Structurementioning

confidence: 99%

Review on Shielding Mechanism and Structural Design of Electromagnetic Interference Shielding Composites

Wang

Liu

et al. 2021

Macro Materials & Eng

132

View full text Add to dashboard Cite

Conductive polymer composites (CPCs) for electromagnetic interference shielding have received significant attention and shown rapid development. According to the electromagnetic wave interface conduction theory of Schelkunoff, excellent conductive performance and perfect conductive network structure are prerequisites for high shielding efficiency of electromagnetic interference shielding composites. Effective multiple interface reflection absorption, dielectric loss, and hysteresis loss characteristics of the materials are crucial for realizing the regulation of the electromagnetic interference shielding performance of CPCs. Therefore, the structural design of conductive and magnetic network for CPCs is crucial for achieving high shielding performance. In this study, it is established that an electromagnetic shielding composite with a uniform structure is widely used because of its simple preparation process, but its inefficient conductive network causes a high percolation threshold. The inefficiency can be solved by designing a composite structure and improving the efficiency of the conductive network. Currently, common structural designs include segregated structural, layered structural, and foam structural designs. These structural designs effectively solve the problem of high percolation threshold of CPCs and coordinate the contradiction between the performance of electromagnetic interference shielding and other advantages.

show abstract

Section: Layered Structurementioning

confidence: 99%

Review on Shielding Mechanism and Structural Design of Electromagnetic Interference Shielding Composites

Wang

Liu

et al. 2021

Macro Materials & Eng

132

View full text Add to dashboard Cite

show abstract

“…Electroless Cu and Ni coatings on wood had synergistic effect on electromagnetic shielding effectiveness, mainly due to separation of conductive network and speci c interface polarization mechanism of composite coatings [24][25]. The desired conductive network of composites would show superior charge storage capacity and promote absorption of more incident electromagnetic microwave energy by polarization of electric eld [23][24][25][26].…”

Section: Electromagnetic Shielding Effectiveness Analysismentioning

confidence: 99%

Preparation And Properties of Electroless Cu/Ni Composite Materials Based On Wood

Pan

Guo

Yin

et al. 2021

Preprint

View full text Add to dashboard Cite

The changes of properties of wood-based Cu-Ni composites were studied via electroless Cu and Ni on wood surface to obtain Cu-Ni multilayer composites with excellent properties. The surface and interface morphology of the composite coatings were investigated via laser confocal microscopy and scanning electron microscope (SEM). The crystal structure was characterized by XRD. The hydrophobic properties of the composite coatings were tested via contact angle meter. The surface conductivity of composites was tested via four-probe. The results showed that the electrical conductivity of wood-based Cu-Ni composites was 2370.76 S/cm. The surface roughness was 9.99 μm and the thickness of uniform coating reached 157 μm via one time electroless Ni deposition and two times electroless Cu deposition. XRD analysis showed that the wood surface was uniformly covered with metal coating. The metal Cu and Ni were closely nested together to form a dense composite layer, and the composite material was light in weight. When the electroless Ni was 55 min, the contact angle could reach 123°, indicating that had best hydrophobicity. The average electromagnetic shielding effectiveness (EMSE) of Cu and Ni wood-based composites can reach 93.8 dB at L band ranging from 0.3×103 to 3.0×103 MHz) with a low thickness (157 μm), verified the multilayer composite materials can block over 99.99% of incident EM waves.

show abstract

“…87 On account of the softness, flexibility, breathability, low cost, and simple preparation of textile, it has developed into a research hotspot for electromagnetic shielding materials. [88][89][90] Herein, we summarize the electromagnetic shielding properties of some carbon-based materials in terms of their performance, structure, type, and preparation.…”

Section: Electromagnetic Shielding Materialsmentioning

confidence: 99%

Review of carbon-based electromagnetic shielding materials: film, composite, foam, textile

Zhong

Hong

2020

Textile Research Journal

View full text Add to dashboard Cite

Carbon-based electromagnetic shielding materials are reviewed in terms of their performance, type, and preparation. They include film, composite, foam, and fabric with particular attention on their frequency selectivity ascribed to the periodic structure. The SE/t, referring to shielding effectiveness per unit thickness (dB/mm), and SSE, referring to shielding effectiveness per unit density (dB·cm3/g), are summarized. The main conclusions of this work are as follows: (1) large area film shows higher SE/t, in which carbon nanotube (CNT) film is endowed with the most attractive value (19,500 dB/mm); materials containing CNTs achieve higher shielding efficiency, ascribe to a high specific surface area, have a greater length–diameter ratio, and a one-dimensional continuous-oriented structure; (2) notably, frequency selectivity based on varied period structures has been widely studied; the method includes multilayer structure/printing/cutting/backfilling and, especially, woven fabric; (3) favorable shielding effectiveness is attributed to the shielding material's intrinsic electrical conductivity and structural integrity. Based on these developments, this paper aims to provide some valuable data, highlight the important research direction, and advance the development of carbon-based electromagnetic shielding materials.

show abstract

Multilayer-structured Ni-Co-Fe-P/polyaniline/polyimide composite fabric for robust electromagnetic shielding with low reflection characteristic

Cited by 112 publications

References 51 publications

Review on Shielding Mechanism and Structural Design of Electromagnetic Interference Shielding Composites

Review on Shielding Mechanism and Structural Design of Electromagnetic Interference Shielding Composites

Preparation And Properties of Electroless Cu/Ni Composite Materials Based On Wood

Review of carbon-based electromagnetic shielding materials: film, composite, foam, textile

Contact Info

Product

Resources

About