Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 50, Issue -, Pages 73-80Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2013.03.007
Keywords
Hybrid; Nano-structures; Polymer-matrix composites (PMCs); Electrical properties
Funding
- development program of local science park
- Ulsan Metropolitan City
- Ministry of Education, Science and Technology (MEST)
- Human Resources Training Project for Regional Innovation [2012H1B8A2026133]
- MEST
- National Research Foundation, Korea
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We investigated the electromagnetic interference shielding effectiveness (EMI SE) of composites consisting of an unsaturated polyester matrix containing woven glass or carbon fibers that had been coated with multiwalled carbon nanotubes (MWCNTs). Composite panels consisting of fiber fabrics with various combinations of fabric type and stacking sequence were fabricated. Their EMI SE was measured in the frequency range of 30 MHz-1.5 GHz. The underlying physics governing the EMI shielding mechanisms of the materials, namely, absorption, reflection, and multiple reflections, was investigated and used in analytical models to predict the EMI SE. Simulation and experimental results showed that the contributions of reflection and absorption to EMI shielding is enhanced by sufficient impedance mismatching, while multiple reflections have a negative effect. For a given amount of MWCNTs in the glass-fiber-reinforced composite, coating the outermost, instead of intermediate, glass fiber plies with MWCNTs was found to maximize the conductivity and SE. (C) 2013 Elsevier Ltd. All rights reserved.
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