X-ray photoelectron spectroscopy analysis for the chemical impact of solvent addition rate on electromagnetic shielding effectiveness of HCl-doped polyaniline nanopowders

2015 ◽  
Vol 118 (17) ◽  
pp. 175501 ◽  
Author(s):  
Hesham Ramzy Tantawy ◽  
Blaise-Alexis F. Kengne ◽  
David N. McIlroy ◽  
Tai Nguyen ◽  
Deukhyoun Heo ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Electromagnetic Shielding ◽  
Shielding Effectiveness ◽  
Spectroscopy Analysis ◽  
X Ray ◽  
Addition Rate ◽  
Doped Polyaniline ◽  
Electromagnetic Shielding Effectiveness

Synthesis and Electromagnetic Shielding Properties of Graphene-Fe3O4-BaTiO3/ Silicone Rubber Nanocomposites

2019 ◽  
Vol 950 ◽  
pp. 97-102 ◽  
Author(s):  
Peng Zheng Liu ◽  
Ling Zhang ◽  
Wen Fei Wang ◽  
Wei Cheng ◽  
Deng Feng Li ◽  
...  
Keyword(s):  
Silicone Rubber ◽  
Solvothermal Method ◽  
Graphene Nanosheets ◽  
Electromagnetic Shielding ◽  
Network Analyzer ◽  
Shielding Effectiveness ◽  
X Ray Diffraction ◽  
X Ray ◽  
Electromagnetic Shielding Effectiveness ◽  
Microstructure And Magnetic Properties

A two-step solvothermal method was employed to synthesize the Graphene/Fe3O4/BaTiO3(GFT). X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectra are used to observe the microstructure and magnetic properties of GFT, and the nanoparticles of Fe3O4and BaTiO3were uniformly deposited on the surface of the graphene nanosheets. Then GFT filler and the silicone rubber were mixed to manufacture the electromagnetic shielding materials. The vector network analyzer was employed to evaluate the electromagnetic shielding effectiveness of the modified electromagnetic shielding materials. The influence of the mole ratio of the GFT constituents, the mass content of the filler on the electromagnetic shielding effectiveness was studied between 1 GHz and 20 GHz. It is shown that the GFT/silicone rubber has the best electromagnetic shielding effectiveness for 24:1:1 of graphene: Fe3O4: BaTiO3and 16 % GFT.

Analyses on the Manufacture and Physical Properties of Electromagnetic Shielding/ Far Infrared Ray Nonwoven

2010 ◽  
Vol 97-101 ◽  
pp. 1790-1793
Author(s):  
Jia Horng Lin ◽  
Yu Tien Huang ◽  
Chin Mei Lin ◽  
Yi Chang Yang ◽  
Chien Teng Hsieh ◽  
...  
Keyword(s):  
Physical Properties ◽  
Far Infrared ◽  
Electromagnetic Shielding ◽  
Breaking Force ◽  
Shielding Effectiveness ◽  
Machine Direction ◽  
Tear Strength ◽  
Burst Strength ◽  
Far Infrared Ray ◽  
Electromagnetic Shielding Effectiveness

According to the results, when low melting polyester fiber increased to be 20%, the electromagnetic shielding/ far infrared ray nonwoven obtained the optimum burst strength, maximum breaking force and maximum tear strength, and they were as follows: burst strength was 4.2 kgf/cm2; maximum breaking force was 153.59 N in the cross machine direction and 70.80 N in the machine direction; maximum tear strength was 215.77 N in cross machine direction and 117.07 N in machine direction; and optimum electromagnetic shielding effectiveness (EMSE) was 45 dB.

The investigation of the electromagnetic shielding effectiveness of multi-layered nanocomposite materials from reduced graphene oxide-doped P(AN-VAc) nanofiber mats/PP spunbond

2018 ◽  
Vol 53 (11) ◽  
pp. 1541-1553
Author(s):  
İsmail Tiyek ◽  
Mustafa Yazıcı ◽  
Mehmet Hakkı Alma ◽  
Şükrü Karataş
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electromagnetic Shielding ◽  
Shielding Effectiveness ◽  
Surface Samples ◽  
Reduced Graphene ◽  
Nanofiber Mats ◽  
Electromagnetic Shielding Effectiveness ◽  
Poly Acrylonitrile ◽  
Shielding Material

In this study, the production of an electromagnetic shielding material by doping reduced graphene oxide was aimed. Graphene oxide was produced from graphite through modified Hummer's method, and reduced graphene oxide was obtained by reducing graphene oxide. The reduced graphene oxide- doped poly(acrylonitrile-co-vinyl acetate) nanofiber mats were spun on the Polypropylene spunbond fabrics by a multi-needle electrospinning device at different lap numbers. Multi-layered surface samples of spunbond/nanofiber mats were obtained via calendaring process after overlapping in different layer numbers. The electromagnetic shielding effectiveness (EMSE) of these samples was measured in the range of 0.03–1.5 GHz according to ASTM D4935 standard. The effects of the numbers of laps and layers on the electromagnetic shielding effectiveness of the mats were also investigated. It was found that electromagnetic shielding effectiveness is greatly affected by changing the numbers of laps and layers. Consequently, the highest electromagnetic shielding effectiveness value of 35.49 dB was obtained from the sample containing two layers of nanofiber mats, each of which consisted 50 laps of nanofibers.

scholarly journals Electromagnetic Shielding Effectiveness of Woven Fabrics with High Electrical Conductivity: Complete Derivation and Verification of Analytical Model

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1657 ◽  
Author(s):  
Marek Neruda ◽  
Lukas Vojtech
Keyword(s):  
Electrical Conductivity ◽  
Analytical Model ◽  
Electromagnetic Interference ◽  
Woven Fabrics ◽  
Electromagnetic Shielding ◽  
High Electrical Conductivity ◽  
Shielding Effectiveness ◽  
Textile Composite ◽  
A Value ◽  
Electromagnetic Shielding Effectiveness

In this paper, electromagnetic shielding effectiveness of woven fabrics with high electrical conductivity is investigated. Electromagnetic interference-shielding woven-textile composite materials were developed from a highly electrically conductive blend of polyester and the coated yarns of Au on a polyamide base. A complete analytical model of the electromagnetic shielding effectiveness of the materials with apertures is derived in detail, including foil, material with one aperture, and material with multiple apertures (fabrics). The derived analytical model is compared for fabrics with measurement of real samples. The key finding of the research is that the presented analytical model expands the shielding theory and is valid for woven fabrics manufactured from mixed and coated yarns with a value of electrical conductivity equal to and/or higher than σ = 244 S/m and an excellent electromagnetic shielding effectiveness value of 25–50 dB at 0.03–1.5 GHz, which makes it a promising candidate for application in electromagnetic interference (EMI) shielding.

Sign in / Sign up

Export Citation Format

Share Document