Research on Electromagnetic Interference Shielding Effectiveness of Sisal Fiber/Carbon black/HDPE Composites by Tri-Screw Extrusion Molding

摘要

Polymer composites filled with fillers such as carbon black(CB) can become an electrical conductor, which is gaining popularity for electromagnetic shielding applications. In this paper, the method of tri-screw compounding was adopted to prepare SF/CB/HDPE composites, and the influence of different content of CB and SF on the properties such as shielding effectiveness(SE) and conductivity were studied. It was found that the composites with higher content of CB showed higher electromagnetic SE. Added 8% SF to CB/HDPE system, the performance of composites was significantly improved. Finally, values of theoretical and experimental SE of SF/CB/HDPE composites were compared and the results were in good correlation, which proved out the significance of theoretical guidance of Schelkunoff formula.