文献类型：期刊文献

英文题名：Facile preparation and broadband microwave absorption of multilayered materials based on thin films of reduced graphene oxide

作者：Li Yang, Hui[1];Li, Chao Qun[1];Mo, Run Wei[1];Wang, Jian Nong[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：224

外文期刊名：CARBON

收录：;EI(收录号：20241515867939);WOS:【SCI-EXPANDED(收录号:WOS:001224622400001)】；

基金：This research was supported by National Key R & D Program of China (2022YFA1200075), National Natural Science Foundation of China (52172089), and Innovation Program of Shanghai Municipal Education Commission.

语种：英文

外文关键词：Multilayered structure; RGO film; Microwave absorption; Broadband absorption; Thin thickness

摘要：Microwave absorption (MA) materials have received extensive attention for their wide applications in both civil and military areas. However, many MA materials have a large thickness, high filling ratio, and narrow effective microwave absorption bandwidth (Reflection Loss, RL <= -10 dB) (EAB), and are prepared by complex processes. In this work, a reduced graphene oxide (RGO) film is prepared for the first time by an approach involving floating-dipping and chemical reduction. Compared with previous micrometers-thick RGO films, the present 200 nm-thick dense RGO film is critical for improving not only the impedance matching but also the capability of the material to attenuate incident microwaves. Based on such a thin RGO film, a multilayered material with a jaaumann structure is constructed with individual RGO layers alternating between low dielectric polyethylene terephthalate (PET) sheets. With the superb impedance matching, multilayer attenuation, and multi-cavity resonance, the present multilayered material can achieve a wide EAB of 13.75 GHz with a minimum reflection loss of -47.69 dB using only 3 layers of RGO films. This study provides a new and simple strategy for the development of layered materials with a thin thickness, low filling ratio, and strong absorption with a wide EAB.