Conduction noise absorption by fiber-reinforced epoxy composites with carbon nanotubes

• Published in: Journal of magnetism and magnetic materials Vol. 323; no. 5; pp. 587 - 591
• Main Authors: Lee, Ok Hyoung, Kim, Sung-Soo, Lim, Yun-Soo
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-03-2011; Elsevier
• Subjects: Applied sciences; Carbon fiber; Carbon fibers; Carbon nanotube; Carbon nanotubes; Composites; Electrical conductivity; Electromagnetic interference; Electromagnetic waves; Exact sciences and technology; Forms of application and semi-finished materials; Glass fiber; Glass fiber reinforced plastics; Magnetic property; Networks; Noise; Polymer industry, paints, wood; Polymer matrix composites; Technology of polymers; Magnetic property; Carbon nanotube; Glass fiber; Electromagnetic interference; Carbon fiber; Wave absorption; Electrical conductivity; Fiber reinforced material; Epoxy resin; Carbon nanotubes; Background noise; Electromagnetic wave; Composite material; Magnetic properties
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2010.10.018

Nearly all electronic equipment is susceptible to malfunction as a result of electromagnetic interference. In this study, glass fiber, and carbon fiber as a type reinforcement and epoxy as a matrix material were used to fabricate composite materials. In an attempt to increase the conduction noise absorption, carbon nanotubes were grown on the surface of glass fibers and carbon fibers. A microstrip line with characteristic impedance of 50
Ω in connection with network analyzer was used to measure the conduction noise absorption. In comparing a glass fiber/epoxy composite with a GF-CNT/Ep composite, it was demonstrated that the CNTs significantly influence the noise absorption property mainly due to increase in electric conductivity. In the carbon fiber composites, however, the effectiveness of CNTs on the degree of electric conductivity is negligible, resulting in a small change in reflection and transmission of an electromagnetic wave.
► In this study, glass fiber and carbon fiber as a type reinforcement and epoxy as a matrix material were used to fabricate composite materials. In an attempt to increase the conduction noise absorption, carbon nanotubes (CNTs) were grown on the surface of glass fibers and carbon fibers. A microstrip line with characteristic impedance of 50
Ω in connection with network analyzer was used to measure the conduction noise absorption. ► In comparing a glass fiber/epoxy composite with a GF-CNT/Ep composite, it was demonstrated that the CNTs significantly influence the noise absorption property mainly due to increase in electric conductivity. In the carbon fiber composites, however, the effectiveness of CNTs on the degree of electric conductivity is negligible, resulting in a small change in reflection and transmission of an electromagnetic wave.