CNT/UHMWPE Nanocomposites for EMI shielding Applications

M.H. Al-Saleh
Jordan University of Science and Technology, JO

Keywords: CNT, UHMWPE, electrical conductivity, EMI shielding

Summary:

Carbon nanotube (CNT) particles were placed at the external surface of ultrahigh molecular weight polyethylene (UHMWPE) powder by wet mixing. Chloroform was used to disperse the CNT and UHMWPE powder. After the solvent removal, the dry powder coated with CNT was annealed by compression molding to produce nanocomposite materials, in which the CNT was found to form a segregated network. The microstructure, electrical and electrometric interference (EMI) shielding properties of the nanocomposites after compression molding were investigated. Due to the selective localization of the nanotube particles at the external surface of the relatively large UHMWPE powder, average particle size ~ 50 m, only 0.054 vol% CNT were required to create a conductive network within the polymer matrix. The EMI SE was found to increase with CNT content and EMI SE of 50 dB was reported for a 1.0 mm thick plate made of 10 wt% CNT/UHMWPE nanocomposite. This nanostructured material is suitable for many applications in the computer and electronics industries.