Nitrogen–Sulfur Co-Doped Reduced Graphene Oxide-Nickel Oxide Nanoparticle Composites for Electromagnetic Interference Shielding

2019 ◽  
Vol 2 (7) ◽  
pp. 4626-4636 ◽  
Author(s):  
Rajesh Kumar ◽  
Wagner C. Macedo ◽  
Rajesh K. Singh ◽  
Vidhu S. Tiwari ◽  
Carlos J. L. Constantino ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Nickel Oxide ◽  
Reduced Graphene Oxide ◽  
Electromagnetic Interference ◽  
Electromagnetic Interference Shielding ◽  
Nickel Oxide Nanoparticle ◽  
Reduced Graphene ◽  
Oxide Nanoparticle ◽  
Nanoparticle Composites ◽  
Co Doped

Enhancing the electromagnetic interference shielding of flexible films with reduced graphene oxide-based coatings

2021 ◽  
Vol 158 ◽  
pp. 106341
Author(s):  
Anna Paula Godoy ◽  
Leice G. Amurim ◽  
Alexandre Mendes ◽  
Emerson S. Gonçalves ◽  
Anderson Ferreira ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electromagnetic Interference ◽  
Electromagnetic Interference Shielding ◽  
Flexible Films ◽  
Reduced Graphene

scholarly journals Constructing a Segregated Magnetic Graphene Network in Rubber Composites for Integrating Electromagnetic Interference Shielding Stability and Multi-Sensing Performance

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3277
Author(s):  
Jian Wang ◽  
Baohua Liu ◽  
Yu Cheng ◽  
Zhenwan Ma ◽  
Yanhu Zhan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Natural Rubber ◽  
Reduced Graphene Oxide ◽  
Electromagnetic Interference ◽  
Electromagnetic Interference Shielding ◽  
Cyclic Stretching ◽  
Reduced Graphene ◽  
Wearable Electronic ◽  
Emi Se ◽  
Sensing Performance

A flexible, wearable electronic device composed of magnetic iron oxide (Fe3O4)/reduced graphene oxide/natural rubber (MGNR) composites with a segregated network was prepared by electrostatic self-assembly, latex mixing, and in situ reduction. The segregated network offers the composites higher electrical conductivity and more reliable sensing properties. Moreover, the addi-tion of Fe3O4 provides the composites with better electromagnetic interference shielding effectiveness (EMI SE). The EMI shielding property of MGNR composites is more stable under tensile deformation and long-term cycling conditions and has a higher sensitivity to stretch strain compared with the same structure made from reduced graphene oxide/natural rubber (GNR) composites. The EMI SE value of MGNR composites reduces by no more than 2.9% under different tensile permanent deformation, cyclic stretching, and cyclic bending conditions, while that of GNR composites reduces by approximately 16% in the worst case. Additionally, the MGNR composites have a better sensing performance and can maintain stable signals, even in the case of cyclic stretching with a very small strain (0.05%). Furthermore, they can steadily monitor the changes in resistance signals in various human motions such as finger bending, wrist bending, speaking, smiling, and blinking, indicating that the MGNR composites can be used in future wearable electronic flexibility devices.

Electromagnetic shielding effectiveness of carbon fabric/epoxy composite with continuous graphene oxide fiber and multiwalled carbon nanotube

2018 ◽  
Vol 52 (24) ◽  
pp. 3341-3350 ◽  
Author(s):  
Nuray Ucar ◽  
Burçak Karagüzel Kayaoğlu ◽  
Arınc Bilge ◽  
Gunseli Gurel ◽  
Pınar Sencandan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Carbon Nanotube ◽  
Reduced Graphene Oxide ◽  
Electromagnetic Interference ◽  
Shielding Effectiveness ◽  
Electromagnetic Interference Shielding ◽  
Multiwalled Carbon ◽  
Oxide Fiber ◽  
Reduced Graphene ◽  
Electromagnetic Interference Shielding Effectiveness

Carbon fabric composite is used in technical applications such as aircrafts in which electromagnetic shielding (electromagnetic interference–shielding effectiveness) is required. Traditionally, metallic coatings or metal plates are used for electromagnetic shielding, however, conductive filler-filled composite is also alternative to metal sheets due to its light weight. In the literatures, there are studies about effect carbon nanotube and graphene oxide flakes on electromagnetic interference; however, there are no studies encountered that search the effect of carbon nanotube/graphene oxide fiber and alignment of graphene oxide fiber on electromagnetic interference. Thus, in this study, fabrication of light-weight carbon fabric/epoxy composite filled with graphene oxide fiber, reduced graphene oxide fiber and multiwalled carbon nanotube and alignment of graphene oxide fiber was studied for the first time for both electromagnetic shielding (electromagnetic interference–shielding effectiveness) and electrical conductivity. It was found that reduced graphene oxide with two layers at the same alignment (0–0) leads to increment in the electromagnetic interference–shielding effectiveness value, while reduced graphene oxide with opposite alignment (0–90) leads to decrease in the electromagnetic interference–shielding effectiveness value. Opposite to literatures for graphene oxide flakes, highly rough surface of graphene oxide fiber and reduced graphene oxide fiber causes a deterioration in electromagnetic interference–shielding effectiveness due to disruptive multiple reflections resulted from highly rough surface of graphene oxide fiber, which causes multiple reflection effect. Multiwalled carbon nanotube generally provides higher electromagnetic interference–shielding effectiveness than graphene-based fiber because it has higher conductivity and has no disruptive effect of crimpy surface as graphene oxide fiber. Multiwalled carbon nanotube loading of 15 wt% results to 32 dB electromagnetic interference–shielding effectiveness, which is considered an adequate and moderate level of shielding for many applications.

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