Phys.org August 4, 2021
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 satisfactory electrical and mechanical properties. An international team of researchers (Greece, Italy) produced centimetre-scale CVD graphene/polymer nanolaminates by using an iterative ‘lift-off/float-on’ process. These have outperformed, for the same graphene content, state-of-the-art flake-based graphene polymer composites in terms of mechanical reinforcement and electrical properties. The thin laminate materials have shown a high electromagnetic interference (EMI) shielding effectiveness, reaching 60 dB for a small thickness of 33 μm, and an absolute EMI shielding effectiveness close to 3·105 dB cm2 g−1 which is amongst the highest values for synthetic, non-metallic materials produced to date…read more. Open Access TECHNICAL ARTICLEÂ
Electrical and EMI shielding properties of the Gr/PMMA nanolaminates. Credit: Nature Communications volume 12, Article number: 4655 (2021)Â