High shielding effectiveness of multilayer graphene oxide aerogel film/polymer composites

被引：32

作者：

Han, Dong ^{[1
]}

Zhao, Yun-Hong ^{[1
]}

Bai, Shu-Lin ^{[1
]}

Ping, Wong Ching ^{[2
]}

机构：

[1] Peking Univ, Dept Mat Sci & Engn, HEDPS CAPT LTCS, Key Lab Polymer Chem & Phys,Minist Educ,Coll Engn, Beijing 100871, Peoples R China

[2] Chinese Univ Hong Kong, Dept Elect Engn, Shatin, Hong Kong, Peoples R China

来源：

RSC ADVANCES | 2016年 / 6卷 / 95期

关键词：

ROOM-TEMPERATURE; FOAM COMPOSITES; NANOCOMPOSITES; REDUCTION; FILMS; GRAPHITE; BEHAVIOR; GELATION;

D O I：

10.1039/c6ra20976a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this work, an efficient and simple method is proposed to fabricate lightweight and flexible composites composed of a reduced graphene oxide aerogel film (rGO-AF) and a polydimethylsiloxane (PDMS) matrix. Their morphology, electromagnetic interference (EMI) shielding effectiveness (SE), and corresponding mechanisms are studied. The rGO-AF was obtained by a process with combinations of zinc reduction, freeze-drying, peeling and stacking. Then, single and multilayer rGO-AF/PDMS composites were fabricated by liquid PDMS infiltrating and curing. The shielding effectiveness of the composites is found to depend on the gelation time. The prepared five-layer composite with a density of 0.122 g cm(-3) and a thickness of 1.547 mm, has an SE value of 53 dB at X band (8.2-12.4 GHz), and a specific SE of up to 434 dB cm(3) g(-1). Based on the measurements on absorption and reflection shielding effectiveness, the high electromagnetic irradiation (EMI) shielding effectiveness of rGO-AF/PDMS composites is attributed to the absorption dominated shielding attenuation.

引用

页码：92168 / 92174

页数：7

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