Study on the Electromagnetic Shielding and Conductivity of Polyetheretherketone/Multi-Walled Carbon Nanotubes Composites
The aim of this study is to investigate the effect of carbon nanotubes on the electromagnetic shielding and electrical conductivity of polyetheretherketone(PEEK).The modified multi-walled carbon nanotubes(mMWCNT)was prepared using cetyltrimethylammonium bromide(CTAB)as a dispersing agent.The PEEK/mMWCNT composits were prepared by the processing technology of wet mixing and extrusion blending.The results showed that the mMWCNT were well-dispersed in PEEK matrix,which provided strong support for improving the mechanical and electrical properties of the composites.When the mMWCNT mass fraction was lower than 2.0%,the mechanical properties of PEEK/mMWCNT composites were significantly improved.The mMWCNT formed a 3D network with good conductivity in PEEK.In terms of electromagnetic shielding performance,the total electromagnetic shielding efficiency of PEEK/mMWCNT composites ranged from3.35 dB to 24.47 dB,which indicated a good absorption of X-band electromagnetic waves.This study confirmed that PEEK/mMWCNT composites have superior electrical conductivity and electromagnetic shielding properties.Hence,the composites have a wide application potential in electronic equipment,communication technology and military protection.
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