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Materials 2016, 9(1), 10; doi:10.3390/ma9010010

Scalable Fabrication of Natural-Fiber Reinforced Composites with Electromagnetic Interference Shielding Properties by Incorporating Powdered Activated Carbon

1
MOE Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China
2
Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76203, USA
3
Department of Electrical Engineering, University of North Texas, Denton, TX 76203, USA
*
Authors to whom correspondence should be addressed.
Academic Editor: Kim Pickering
Received: 17 November 2015 / Revised: 18 December 2015 / Accepted: 18 December 2015 / Published: 25 December 2015
(This article belongs to the Special Issue Bio- and Natural-Fiber Composites)
View Full-Text   |   Download PDF [2199 KB, uploaded 25 December 2015]   |  

Abstract

Kenaf fiber—polyester composites incorporated with powdered activated carbon (PAC) were prepared using the vacuum-assisted resin transfer molding (VARTM) process. The product demonstrates the electromagnetic interference (EMI) shielding function. The kenaf fibers were retted in a pressured reactor to remove the lignin and extractives in the fiber. The PAC was loaded into the freshly retted fibers in water. The PAC loading effectiveness was determined using the Brunauer-Emmett-Teller (BET) specific surface area analysis. A higher BET value was obtained with a higher PAC loading. The transmission energies of the composites were measured by exposing the samples to the irradiation of electromagnetic waves with a variable frequency from 8 GHz to 12 GHz. As the PAC content increased from 0% to 10.0%, 20.5% and 28.9%, the EMI shielding effectiveness increased from 41.4% to 76.0%, 87.9% and 93.0%, respectively. Additionally, the EMI absorption increased from 21.2% to 31.7%, 44.7% and 64.0%, respectively. The ratio of EMI absorption/shielding of the composite at 28.9% of PAC loading was increased significantly by 37.1% as compared with the control sample. It was indicated that the incorporation of PAC into the composites was very effective for absorbing electromagnetic waves, which resulted in a decrease in secondary electromagnetic pollution. View Full-Text
Keywords: natural-fiber; composites; electromagnetic interference (EMI) shielding; activated carbon; vacuum-assisted resin transfer molding (VARTM) natural-fiber; composites; electromagnetic interference (EMI) shielding; activated carbon; vacuum-assisted resin transfer molding (VARTM)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Xia, C.; Zhang, S.; Ren, H.; Shi, S.Q.; Zhang, H.; Cai, L.; Li, J. Scalable Fabrication of Natural-Fiber Reinforced Composites with Electromagnetic Interference Shielding Properties by Incorporating Powdered Activated Carbon. Materials 2016, 9, 10.

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