RESEARCH ARTICLE


Process and Structure of Electromagnetic Shielding Plywood Composite Laminated with Carbon Fiber Paper



Quanping Yuan, Keyang Lu, Feng Fu*
Research Institute of Wood Industry, Chinese Academy of Forestry; Key Lab of Wood Science and Technology of State Forestry Administration, Xiangshan Road, Haidian District, Beijing, 100091, P.R. China.


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© 2014 Yuan et al;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Research Institute of Wood Industry, Chinese Academy of Forestry; Key Lab of Wood Science and Technology of State Forestry Administration, Xiangshan Road, Haidian District, Beijing, 100091, P.R. China; Tel: 86-13683598407, 86-10-62889973; Fax: 86-10-62881937; E-mail: cafst@163.com, feng@caf.ac.cn


Abstract

Carbon fiber paper (CFP), a type of flexible planer electromagnetic shielding material with thin thickness, low density, and good adhesion property and permeability, was laminated with wood veneer to produce a plywood composite with good shielding effectiveness (SE). It was found that a hot-press pressure of 1.2 MPa and a double-sized adhesive concentration of 380 g/m2 were most appropriate for the production of CFP plywood composites. SE of plywood composite laminated with single layer CFP was better than that before hot pressed, which result from the formation of three-dimensional and smaller conductive carbon fiber circuitries. The space between two-layer CFPs and the thickness of the surface-layer veneer had significant influence on SE. The SE of the composites laminated with two-layer CFPs was significantly higher than those with one-layer CFPs. The SE in the frequency range of 30 MHz to 1 GHz reached above 30 dB depending on the space between two-layer CFPs and the thickness of the surface veneer, which was sufficient SE for commercialization and the use of plywood composites.

Keywords: Carbon fiber paper, electromagnetic shielding, hot-press process, laminate structure, plywood composite.