Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 160, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2022.107068
Keywords
A; Hybrid; Nanocomposites; B; Interface; Electromagnetic absorption
Funding
- Foundation of Provincial Natural Science Research Project of Anhui Colleges [KJ2021ZD0047]
- Anhui Provincial Natural Science Foundation [2008085J27]
- China Postdoctoral ScienceFoundation [2019 M652160]
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Reduced graphene oxide/zinc oxide (RGO/ZnO) composite aerogels were synthesized through a one-pot hydrothermal route, and exhibited low density, porous network structure, and excellent electromagnetic absorption, flame retardancy, and compression resilience properties.
In this work, reduced graphene oxide/zinc oxide (RGO/ZnO) composite aerogels were constructed through a one-pot hydrothermal route. Results manifested that the composite aerogels had the extremely low density and a unique three-dimensional porous network structure, and lots of ZnO particles were almost homogeneously loaded on the rippled surfaces of lamellar RGO. Moreover, the micromorphology and electromagnetic absorbing properties of composite aerogels were facilely regulated by changing the additive amounts of sodium citrate. Notably, the optimal minimum reflection loss reached -79.1 dB at a matching thickness of 2.49 mm and maximum effective absorption bandwidth achieved 7.7 GHz under a thickness of 1.97 mm and filling ratio of 20.0 wt%. Furthermore, the attained composite aerogels presented excellent flame retardant and compression resilience properties. Additionally, the possible electromagnetic dissipation mechanism was proposed. This work provided a reference for the design and preparation of RGO-based dielectric composites as the multifunctional electromagnetic wave absorbers.
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