Synergistic Effect of Carbon Nanotubes with Zinc Oxide Nanowires for Enhanced Electromagnetic Shielding Performance of Hybrid Carbon Fiber/Epoxy Composites
Synergistic Effect of Carbon Nanotubes with Zinc Oxide Nanowires for Enhanced Electromagnetic Shielding Performance of Hybrid Carbon Fiber/Epoxy Composites
Developing advanced composites with high electromagnetic shielding effectiveness is of great significance to ensure safety and reliability of electronic devices in complex electromagnetic envi-ronments.We proposed a novel strategy to fabricate carbon fiber-based hybrid composites by in-situ growing zinc oxide(ZnO)nanowires onto carbon fiber(CF)and subsequently depositing carbon nano-tubes(CNT),and infiltrating epoxy(EP)into laminated layers through vacuum-assisted resin transfer molding technique.Microstructures,electrical conductivity,and electromagnetic shielding performance of the acquired CNT-ZnO-CF/EP hybrid composites were investigated in detail.The hybrid composites of 2 mm thickness exhibited excellent electromagnetic shielding performance,and their total electromagnetic shielding effectiveness was up to 50 dB in the 8.2～12.4 GHz band,increasing by 51.52％in comparison to the CF/EP composites.Such high performance is mainly attributed to the high dielectric loss of ZnO nanowires,high electrical conductivity of continuous CNT films,and multiple reflection/absorption losses between laminated structures and multi-component interfaces.This work paves a way for development of advanced composites with high-efficiency electromagnetic shielding and structure/function integration.
维普
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