scholarly journals Multi-walled carbon nanotube–graphene–polyaniline multiphase nanocomposite with superior electromagnetic shielding effectiveness

Nanoscale ◽  
2014 ◽  
Vol 6 (2) ◽  
pp. 842-851 ◽  
Author(s):  
Tejendra K. Gupta ◽  
Bhanu Pratap Singh ◽  
Rakesh B. Mathur ◽  
Sanjay R. Dhakate
Keyword(s):  
Carbon Nanotube ◽  
Electromagnetic Shielding ◽  
Shielding Effectiveness ◽  
Multi Walled Carbon Nanotube ◽  
Electromagnetic Shielding Effectiveness

scholarly journals Crossover Frequency and Transmission-Line Matrix Formalism of Electromagnetic Shielding Properties of Laminated Conductive Sheets

2018 ◽  
Vol 7 (2) ◽  
pp. 28-35
Author(s):  
S. M. Benhamou ◽  
M. Hamouni ◽  
F. Ould-Kaddour
Keyword(s):  
Carbon Nanotube ◽  
Transmission Line ◽  
Polymer Composites ◽  
Electromagnetic Shielding ◽  
Matrix Formalism ◽  
Crossover Frequency ◽  
Shielding Effectiveness ◽  
Transmission Line Matrix ◽  
Shielding Properties ◽  
Electromagnetic Shielding Effectiveness

This paper proposes an approach to calculate the crossover frequency of each layer in the multilayered shield and subsequently that of structure constructed by n layers. This important frequency provides a useful approximation for field penetration in a conductor. It is used in a wide variety of calculations. It is in this context that a simplification of the transmission-line matrix formalism for laminated conductive sheets is done using this frequency. Two ranges of frequency are considered: lower and higher than the crossover frequency. Simples formulas and easy to use of the reflection loss, the internal reflection, the absorption loss and the electromagnetic shielding effectiveness of laminated shield are obtained. Analysis is carried out for the study of two shields: i) single shield of carbon nanotube polymer composites (CNTs), ii) multilayered shield constructed with Nickel–carbon nanotube polymer composites–Aluminum (Ni–CNTs–Al).

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.

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