Electromeganetic Interference (EMI) Shielding Properties Improvement Using a Combination of Carbon Fiber/Carbon Nanotube in a Polyurethane Matrix Using Electrostatic Principals

Electromagnetic Interference (EMI) is a an ever growing problem and concern in our day to day life due to the increased use of electronics, e.g. computers, cell phones, etc.   Due to their application environment, elastomers were the choice.  Earlier approaches were to create a polymer composite with conductive fillers (e.g. carbon black).  Due to the ease of processability and moldability, Polyurethane is one of the widely used materials in these applications.  Recent development has focused on carbon nanotubes due to their superior conductive properties to improve the EMI shielding properties of the polyurethane matrix.  EMI shielding property of these composites is compromised due to the agglomeration.  This work deposits carbon fiber and carbon nanotubes using  a novel deposition technique.  Expecting to improvement of EMI shielding properties due to oriented deposition of carbon fiber/carbon nanotubes.