ELECTROMAGNETIC INTERFERENCE SHIELDING AND LIGHTNING STRIKE PROTECTION OF CARBON NANOFIBER PAPER

摘要

Carbon nanofibers with extremely high aspect ratios possess high electrical conductivity. Combined with low density, carbon nanofibers have a wide range of applications. Electromagnetic interference (EMI) shielding and lightning strike protection are two important applications of carbon nanofibers. In this study, porous, flexible, nonwoven papers of nanofibers are first prepared by the papermaking process. Five different types of nanofibers are used to make the papers. Carbon nano-films are fabricated by incorporating the epoxy into carbon nanopapers. To increase the conductivity of the carbon nanofiber papers, carbon nanofiber was modified with nickel nanostrands and the papers were fabricated by the papermaking process. The papers then act as a surface layer on the composite panels or carbon nano-films. The conductivity and shielding effectiveness (SE) of carbon nanopapers/nanofilms and the lightning strike tolerance on these composite panels are measured in this study, respectively. The test results showed a good correlation between the EMI shielding/lightning strike tolerance and the surface electrical conductivity.