期刊
NATURE COMMUNICATIONS
卷 12, 期 1, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41467-021-24970-4
关键词
-
资金
- research project Graphene Core 3 [GA: 881603]
- National Institute for Nuclear Physics (INFN) under the project TERA
A new fabrication method was used to produce continuous cm-scale graphene/polymer nanolaminates, which showed enhanced electromagnetic interference shielding effectiveness, conductivity, and mechanical properties.
The use of graphene in a form of discontinuous flakes in polymer composites limits the full exploitation of the unique properties of graphene, thus requiring high filler loadings for achieving- for example- satisfactory electrical and mechanical properties. Herein centimetre-scale CVD graphene/polymer nanolaminates have been produced by using an iterative 'lift-off/float-on' process and have been found to outperform, for the same graphene content, state-of-the-art flake-based graphene polymer composites in terms of mechanical reinforcement and electrical properties. Most importantly these thin laminate materials show a high electromagnetic interference (EMI) shielding effectiveness, reaching 60dB for a small thickness of 33 mu m, and an absolute EMI shielding effectiveness close to 3.10(5)dB cm(2) g(-1) which is amongst the highest values for synthetic, non-metallic materials produced to date. The properties of graphene/polymer composites are usually limited by the use of discontinuous graphene flakes. Here, the authors report a fabrication method to realise continuous cm-scale graphene/polymer nanolaminates with enhanced electromagnetic interference shielding effectiveness, conductivity and mechanical properties.
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