Improvements of the Electrical Conductivity and EMI Shielding Efficiency for the Polycarbonate/ABS/Carbon Fiber Composites Prepared by Pultrusion Process

2019 ◽  
Vol 28 (2) ◽  
pp. 118-125 ◽  
Author(s):  
Seung Chan Ryu ◽  
Jae Young Kim ◽  
Choonglai Cho ◽  
Woo Nyon Kim
Keyword(s):  
Electrical Conductivity ◽  
Carbon Fiber ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Emi Shielding ◽  
Pultrusion Process

Cobaltosic oxide fiber/Carbon Fiber composites fabricated by hydrothermal for improved electromagnetic interference shielding properties

2019 ◽  
Vol 33 (09) ◽  
pp. 1950075
Author(s):  
Ming Gong ◽  
Qiang Li ◽  
Lin Sun ◽  
Ai-Qin Tian ◽  
Shou-Guang Sun
Keyword(s):  
Carbon Fiber ◽  
Electromagnetic Interference ◽  
Fiber Composites ◽  
Interface Strength ◽  
Carbon Fiber Composites ◽  
Emi Shielding ◽  
Electromagnetic Interference Shielding ◽  
Calcination Step ◽  
Cobaltosic Oxide ◽  
Shielding Properties

In this paper, a newly designed composite of magnetic nano-Co3O4 fiber coated on carbon fiber (Cf) is prepared and characterized for the electromagnetic interference (EMI) shielding properties. XRD, SEM and TEM are used to investigate the micromorphology and microstructure evolution during the preparation. By hydrothermal method, the flowerlike clusters of single crystal flake-Co(OH)2 are first obtained on Cf. The firstly prepared Co(OH)2 sheets then turn into Co3O4 fibers during the next calcination step. The continuous and loose coating of magnetic Co3O4 nanofibers is finally obtained on the Cf. The loose coating is in proportion to the weight loss, and the wirelike Co3O4 is good for the interface strength for the Cf composite preparation. Based on the above work, the loose magnetic fibers coating on the Cf could be a feasible composite structure for the EMI composite materials integrated with absorbing and reflecting.

Investigation on Carbon Fiber Composites as Architectural EMI Shielding Material

2013 ◽  
Vol 748 ◽  
pp. 309-313 ◽  
Author(s):  
Mohd Shafiq Bin Ruslan ◽  
Chew Sue Ping
Keyword(s):  
Carbon Fiber ◽  
Fiber Composites ◽  
Building Construction ◽  
Carbon Fiber Composites ◽  
Shielding Effectiveness ◽  
Emi Shielding ◽  
Testing Procedures ◽  
Emi Shielding Effectiveness ◽  
Ieee Standard ◽  
Shielding Material

EMI shielding technique by using appropriate shielding material in an enclosure is commonly effective to block signal penetration. This paper presents the investigations on EMI shielding effectiveness of multilayer carbon fiber composites for architectural shielding purposes. The properties of carbon fiber such as high thermal conductivity, corrosion resistant, high tensile strength and excellent EMI shielding property make it suitable to be applied in building construction. The concrete samples with insertion of carbon fiber sheets were undergone the EMI penetration test which is based on IEEE standard testing procedures. These customized structures are proven to reduce signal penetration significantly in the high frequency range up to 2 GHz.

scholarly journals Nonlinear electrical conductivity through the thickness of multidirectional carbon fiber composites

2018 ◽  
Vol 54 (5) ◽  
pp. 3893-3903
Author(s):  
Xi Chen ◽  
Alexander Smorgonskiy ◽  
Jianfang Li ◽  
Anastasios P. Vassilopoulos ◽  
Marcos Rubinstein ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Carbon Fiber ◽  
Fiber Composites ◽  
Carbon Fiber Composites

Comparison of Hollow-Porous and Solid Carbon Fibers as Microwave Absorbents

2010 ◽  
Vol 150-151 ◽  
pp. 1336-1342 ◽  
Author(s):  
Wei Xie ◽  
Hai Feng Cheng ◽  
Zeng Yong Chu ◽  
Zhao Hui Chen ◽  
Yong Jiang Zhou ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Porous Carbon ◽  
Fiber Composites ◽  
Carbon Fiber Composites ◽  
Solid Carbon ◽  
Microwave Absorbing Properties ◽  
Surface Electrical Conductivity ◽  
Microwave Absorbing

A series of polyacrylonitrile-based hollow-porous and solid carbon fibers were prepared by pyrolysis of polyacrylonitrile-based hollow-porous and solid fibers at the same condition. The microstructure, composition, surface electrical conductivity, electromagnetic parameters and reflectivity of carbon fibers were studied. The microwave absorbing properties of two kinds of carbon fibers as microwave absorbents were parallel investigated. Results show that the apparent density of the hollow-porous carbon fibers is lower than that of the solid carbon fibers due to their hollow-porous structure. The surface electrical conductivity of single solid carbon fiber is nearly 10 times that of the hollow-porous carbon fiber. The -10dB bandwidths of solid carbon fiber composites carbonized at 850 and 950°C are both 0GHz, while those of the corresponding hollow-porous carbon fiber composites are up to 3.05 and 2.62GHz, respectively. Results indicate that the microwave absorbing properties of the hollow-porous carbon fiber composites are better than those of solid carbon fiber composites.

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