期刊
ADVANCED MATERIALS
卷 29, 期 31, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201701583
关键词
carbon nanotubes; electromagnetic interference shielding; graphene edge planes; nano-reinforcement; seamless junctions
类别
资金
- National Natural Science Foundation of China [51502242, 51602258, 51432008, 51521061, 51332004]
- Program of Introducing Talents of Discipline to Universities [B08040]
- Fundamental Research Funds for the Central Universities [3102016ZY009]
Materials with an ultralow density and ultrahigh electromagnetic-interference (EMI)-shielding performance are highly desirable in fields of aerospace, portable electronics, and so on. Theoretical work predicts that 3D carbon nanotube (CNT)/graphene hybrids are one of the most promising lightweight EMI shielding materials, owing to their unique nanostructures and extraordinary electronic properties. Herein, for the first time, a lightweight, flexible, and conductive CNT-multilayered graphene edge plane (MLGEP) core-shell hybrid foam is fabricated using chemical vapor deposition. MLGEPs are seamlessly grown on the CNTs, and the hybrid foam exhibits excellent EMI shielding effectiveness which exceeds 38.4 or 47.5 dB in X-band at 1.6 mm, while the density is merely 0.0058 or 0.0089 g cm(-3), respectively, which far surpasses the best values of reported carbon-based composite materials. The grafted MLGEPs on CNTs can obviously enhance the penetration losses of microwaves in foams, leading to a greatly improved EMI shielding performance. In addition, the CNT-MLGEP hybrids also exhibit a great potential as nano-reinforcements for fabricating high-strength polymer-based composites. The results provide an alternative approach to fully explore the potentials of CNT and graphene, for developing advanced multifunctional materials.
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