Ultralight and ordered lamellar polyimide-based graphene foams with efficient broadband electromagnetic absorption

被引：52

作者：

Zhang, Yawei ^{[1
]}

Li, Shuangshuang ^{[1
]}

Tang, Xinwei ^{[1
]}

Fan, Wei ^{[2
]}

Lan, Qianqian ^{[1
]}

Li, Le ^{[1
]}

Ma, Piming ^{[1
]}

Dong, Weifu ^{[1
]}

Wang, Zicheng ^{[1
]}

Liu, Tianxi ^{[1
]}

机构：

[1] Jiangnan Univ, Sch Chem & Mat Engn, Inst Nanocomposites & Energy Mat, Key Lab Synthet & Biol Colloids,Minist Educ, Wuxi 214122, Jiangsu, Peoples R China

[2] Donghua Univ, Coll Mat Sci & Engn, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2022年 / 102卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Polyimide; Graphene; Foam; Ordered lamellar structure; Microwave absorption; MICROWAVE-ABSORPTION; FACILE FABRICATION; COMPOSITE; AEROGELS; PERFORMANCE; OXIDE;

D O I：

10.1016/j.jmst.2021.07.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The development of high-performance microwave absorption materials with strong absorption capacity and broad bandwidth is highly desirable in the field of electromagnetic pollution protection. Herein, ultralight polyimide-based graphene foam with ordered lamellar structure is precisely designed and controllably constructed by bidirectional freezing process. More lamellar interfaces formed inside the foam per unit volume effectively facilitate the layer-by-layer dissipation for the vertical incident electromagnetic waves, thereby endowing the foam with efficient broadband electromagnetic absorption performance. More importantly, electromagnetic absorption performance can be controllably adjusted by optimizing impedance distribution and microstructure of skeletons. As a result, the optimized foam with an ultralow density of 9.10 mg/cm(3) presents a minimum reflection loss value of -61.29 dB at 9.25 GHz and an effective absorption bandwidth of 5.51 GHz (7.06-12.57 GHz, covering the whole X band) when the thickness is 4.75 mm. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：97 / 104

页数：8

共 40 条

[1] A resilient and lightweight bacterial cellulose-derived C/rGO aerogel-based electromagnetic wave absorber integrated with multiple functions [J].