Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 124, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2019.105512
Keywords
Polymer-matrix composites (PMCs); Electrical properties; Electron microscopy; Casting
Funding
- Space Supporting Fund from China Aerospace Science and Industry Corporation [2019-HT-XG, 2018-HT-XG]
- Foundation of Aeronautics Science Fund [2017ZF53071]
- Natural Science Basic Research Plan for Distinguished Young Scholars in Shaanxi Province of China [2019JC-11]
- Natural Science Basic Research Plan in Shaanxi Province of China [2018JM5001]
- School-enterprise Collaborative Innovation Fund for Graduate Students of Northwestern Polytechnical University [XQ201913]
- Seed Foundation of Innovation and Creation for Graduate Students in NPU [ZZ2019034]
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Reduced graphene oxide films (RGFs) were fabricated by the method of bar-coating followed by chemical and thermal reduction. And the RGFs/epoxy resin (RGFs/EP) electromagnetic interference (EMI) shielding composites were prepared by introducing RGFs into EP matrix via pre-arrangement method. The introduction of highly aligned RGFs with layered structure was more conducive to improving the EMI shielding effectiveness (SE) and in-plane electrical conductivities of the RGFs/EP EMI shielding composites. A superior EMI SE value of 82 dB was achieved for 8-RGFs/EP EMI shielding composites at X-band, almost 41 times higher than that of pure EP (similar to 2 dB). Superior EMI shielding performances are mainly attributed to multiple reflection, absorption and scattering inside and between RGFs interlayers, and the shielding mechanism is mainly ascribed to absorption. Meantime, the obtained in-plane electrical conductivitiy significantly increases from 10(-12) S/m of pure EP to 591.7 S/m of the 8-RGFs/EP EMI shielding composites.
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