Plasmolysis-inspired Yolk-Shell Hydrogel-core@Void@MXene-shell Microspheres with Strong Electromagnetic Interference Shielding Performance

2021 ◽  
Author(s):  
Chenxi Li ◽  
Xingxing Ni ◽  
Yang Lei ◽  
Shangyang Li ◽  
Bo You ◽  
...  
Keyword(s):  
Electromagnetic Interference ◽  
Electromagnetic Waves ◽  
Multilayered Structure ◽  
Electromagnetic Shielding ◽  
Electromagnetic Interference Shielding ◽  
Shielding Material

Benefiting from specific multilayered structure, yolk−shell microspheres with void spaces are considered as the promising electromagnetic shielding material which does well in enhancing the decay of electromagnetic waves. Commonly reported...

scholarly journals Lightweight and flexible MXene/CNF/silver composite membranes with a brick-like structure and high-performance electromagnetic-interference shielding

RSC Advances ◽  
2019 ◽  
Vol 9 (51) ◽  
pp. 29636-29644 ◽  
Author(s):  
Wei Xin ◽  
Guo-Qiang Xi ◽  
Wen-Tao Cao ◽  
Chang Ma ◽  
Tong Liu ◽  
...  
Keyword(s):  
Electromagnetic Interference ◽  
High Performance ◽  
Composite Membranes ◽  
Electromagnetic Shielding ◽  
Electromagnetic Interference Shielding ◽  
Shielding Material ◽  
Silver Composite

Flexible and lightweight MXene/CNF/silver composite membranes are vacuum filtered to form a high electromagnetic shielding material with a brick-like structure. The membranes have an excellent electromagnetic shielding performance of 50.7 dB.

Medical Building Materials of Structural Properties and Electromagnetic Interference Shielding in the Quartz Crystal Plane Coated Ni Based Thin Film

2014 ◽  
Vol 599-601 ◽  
pp. 67-76
Author(s):  
Fei Shuo Hung
Keyword(s):  
Thin Film ◽  
Electromagnetic Interference ◽  
High Frequency ◽  
Electromagnetic Waves ◽  
Building Materials ◽  
Electromagnetic Shielding ◽  
Shielding Effect ◽  
Coating Film ◽  
Emi Shielding ◽  
Electromagnetic Interference Shielding

Medical use quartz components for electromagnetic shielding materials research topics very rarely, therefore, intend to systematic development of coated quartz glass materials. The considerations for against electromagnetic waves (Electromagnetic Interference Shielding, EMI), one conductive coating film is required. The anti-high-frequency electromagnetic waves also need magnetic coating film. The thin film is translucent with a poor crystallinity, must be heat-treated to have good crystallization and conductivity, and therefore finds the feasible of Ni-based coating and interface effects also have the academic importance. This program is to deposit Ni-based thin film on different quartz planes (Ni/SiO2), and explores the effect of heat treatment on the structure. That contains crystalline characteristics (doping concentration: the Ni-base matrix doping Fe, 10at%~ 50at.%), optical properties and electrical conductivity. Finally, the electromagnetic shielding effect (EMI) of the coating structure is assessed. So, the application data for the characteristics of interface layer and anti-electromagnetic (EMI) properties are obtained. building materials extended to the health care system materials systems. The results show that Sn-40Al-xNi film increased the electromagnetic interference (EMI) shielding after annealed. For the Sn-40Al-10Ni films with higher Ni atomic concentration, the low frequency EMI shielding could be improved. For the sputtering films the annealed treatment not only had higher electric conductivity but also increased the high frequency EMI shielding.

Conductive polymer-based electro-conductive textile composites for electromagnetic interference shielding: A review

2016 ◽  
Vol 47 (8) ◽  
pp. 2228-2252 ◽  
Author(s):  
Subhankar Maity ◽  
Arobindo Chatterjee
Keyword(s):  
Electromagnetic Interference ◽  
Conductive Polymers ◽  
Conductive Polymer ◽  
Polymer Processing ◽  
Textile Composites ◽  
Electromagnetic Shielding ◽  
Electromagnetic Interference Shielding ◽  
Textile Materials ◽  
Electromagnetic Shield ◽  
Conductive Textile

This article reviews the preparation, development and characteristics of conductive polymer-based electro-conductive textile composites for electromagnetic interference shielding. Modification of ordinary textile materials in the form of electro-conductive composites makes them suitable for this purpose. Various metallic and non-metallic electro-conductive textiles have been explored here as the material for electromagnetic shielding. Different approaches of preparing textile electromagnetic shield have been described here. Recent advancements of application of conductive polymers in the field of textile electromagnetic shielding are described. Conductive polymer-coated textile materials showed superior electrical property as electromagnetic shield. Different methods of applications of conductive polymers onto textile surface are described here with their relative merits and demerits. Different conductive polymer-coated woven and nonwoven fabrics prepared by various researchers for electromagnetic shielding are taken into account. The effects of different process parameters of polymer processing on electromagnetic shielding are described.

Graphene nanohybrids: excellent electromagnetic properties for the absorbing and shielding of electromagnetic waves

2018 ◽  
Vol 6 (17) ◽  
pp. 4586-4602 ◽  
Author(s):  
Maosheng Cao ◽  
Chen Han ◽  
Xixi Wang ◽  
Min Zhang ◽  
Yanlan Zhang ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Charge Transport ◽  
Microwave Absorption ◽  
Electromagnetic Interference ◽  
Electromagnetic Waves ◽  
Electromagnetic Properties ◽  
Response Mechanism ◽  
Microwave Response ◽  
Electromagnetic Interference Shielding

The microwave absorption, electromagnetic interference shielding, and microwave response mechanism of graphene hybrids are highlighted, including relaxation, charge transport, magnetic resonance,etc.

Preparation and properties of polyimide/Fe3O4 composite foams

2018 ◽  
Vol 47 (2) ◽  
pp. 173-179 ◽  
Author(s):  
Ling Weng ◽  
Ting Wang ◽  
Pei-Hai Ju ◽  
Li-Zhu Liu
Keyword(s):  
Electromagnetic Interference ◽  
Temperature Stability ◽  
Electromagnetic Shielding ◽  
Great Promise ◽  
Electromagnetic Interference Shielding ◽  
High Temperature Stability ◽  
Composite Foam ◽  
Content Type ◽  
Nanocomposite Foams ◽  
Composite Foams

Purpose This paper aims to develope the electromagnetic interference shielding materials with high performance. To develop advanced polymer-based electromagnetic interference shielding materials with rather high temperature stability, good processability and moderate mechanical properties, the authors chose the polyimide (PI) foam as matrix and ferriferrous oxide (Fe3O4) as fillers to prepare the composite foams with lightweight and rather good electromagnetic interference shielding performance. Design/methodology/approach Some polyimide nanocomposite foams with Fe3O4 as fillers have been prepared by in situ dispersion and foaming with pyromellitic dianhydride (PMDA) and isocyanate (PAPI) as raw materials and water as foaming agent. By varying the Fe3O4 contents, a series of PI/Fe3O4 nanocomposite foams with fine microstructures and high thermal stability were obtained. The structure and performances of nanocomposite foams were examined, and the effects of Fe3O4 on the microstructure and properties of composite foams were investigated. Findings This work demonstrates that PI/Fe3O4 foams could be fabricated by thermally treating the polyimide foam intermediates with Fe3O4 nanoparticles through a blending reaction of precursors. The final PI/Fe3O4 composite foams maintained the excellent thermal property and showed a super paramagnetic behaviour, which has a positive effect on the improvement of electromagnetic shielding performance. Research limitations/implications In this paper, the effects of Fe3O4 on the performances of PI/Fe3O4 composite foam were reported. It provided an effective methodology for the preparation of polymer/Fe3O4 nanocomposite foams, which hold great promise towards the potential application in the areas of electromagnetic shielding materials. Originality/value A series of PI/Fe3O4 composite foams with different contents of Fe3O4 were prepared by blending reaction of the precursors. The effects of Fe3O4 on the structures and properties of PI/Fe3O4 composite foam were discussed in detail.

Ultrathin graphene: electrical properties and highly efficient electromagnetic interference shielding

2015 ◽  
Vol 3 (26) ◽  
pp. 6589-6599 ◽  
Author(s):  
Mao-Sheng Cao ◽  
Xi-Xi Wang ◽  
Wen-Qiang Cao ◽  
Jie Yuan
Keyword(s):  
Electrical Properties ◽  
Information Security ◽  
Rapid Growth ◽  
Electromagnetic Interference ◽  
Electromagnetic Waves ◽  
Electronic Devices ◽  
Strong Absorption ◽  
Emi Shielding ◽  
Electromagnetic Interference Shielding ◽  
Electromagnetic Pollution

Ultrathin graphene, a 2D material, demonstrates outstanding features and rapid growth for EMI shielding due to its strong absorption towards electromagnetic waves in composites. It is sought after for communication, electronic devices, information security, electromagnetic pollution defense and healthcare.

Polymer nanocomposite foam filled with carbon nanomaterials as an efficient electromagnetic interference shielding material

RSC Advances ◽  
2015 ◽  
Vol 5 (54) ◽  
pp. 43036-43057 ◽  
Author(s):  
Sanjay R. Dhakate ◽  
Kiran M. Subhedar ◽  
Bhanu Pratap Singh
Keyword(s):  
Polymer Composites ◽  
Electromagnetic Interference ◽  
Carbon Nanomaterials ◽  
Polymer Nanocomposite ◽  
Carbon Nanomaterial ◽  
Shielding Effectiveness ◽  
Electromagnetic Interference Shielding ◽  
Foam Filled ◽  
Nanocomposite Foam ◽  
Shielding Material

Among different carbon nanomaterial foam-filled polymer composites, graphene-based foam gives superior specific shielding effectiveness when compared to typical metals.

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