Preparation and microwave absorption properties of asphalt carbon coated reduced graphene oxide/magnetic CoFe2O4 hollow particles modified multi-wall carbon nanotube composites

摘要

Design lightweight hybrid structured, magnetic CoFe2O4 hollow particles modified multi-wall carbon nanotubes (MWCNTs) with reduced graphene oxide (RGO) sheets to improve microwave shielding. Carbon coated reduced graphene oxide/magnetic CoFe2O4 hollow particles modified multi-wall carbon nanotube composites were prepared, which exhibited significant microwave absorption performance. As an absorber, the composites with a filler loading of 20 wt% exhibited significant microwave absorption properties due to the special nanostructure, the extra void space, the high surface area and the synergistic effect. The maximum reflection loss reaches -46.8 dB with a thickness of 1.6 mm at 11.6 GHz. The bandwidth corresponding to the reflection loss below -10 dB is 13.1 GHz (4.9-18 GHz) with thickness in the range of 1.2 mm-4 mm. (C) 2017 Elsevier B.V. All rights reserved.