Multifunctional hybrids for electromagnetic absorption

被引：110

作者：

Huynen, I. ^{[2
,3
]}

Quievy, N. ^{[4
]}

Bailly, C. ^{[1
,2
,4
]}

Bollen, P. ^{[1
,3
,4
]}

Detrembleur, C. ^{[5
]}

Eggermont, S. ^{[3
]}

Molenberg, I. ^{[3
]}

Thomassin, J. M. ^{[5
]}

Urbanczyk, L. ^{[5
]}

Pardoen, T. ^{[1
,2
]}

机构：

[1] Catholic Univ Louvain, Inst Mech Mat & Civil Engn iMMC, B-1348 Louvain, Belgium

[2] Catholic Univ Louvain, Res Ctr Micro & Nanoscop Mat & Elect Devices, CeRMiN, B-1348 Louvain, Belgium

[3] Catholic Univ Louvain, Microwave Lab, B-1348 Louvain, Belgium

[4] Catholic Univ Louvain, Inst Condensed Matter & Nanosci, B-1348 Louvain, Belgium

[5] Univ Liege, Ctr Educ & Res Macromol, B-4000 Liege, Belgium

来源：

ACTA MATERIALIA | 2011年 / 59卷 / 08期

关键词：

Electromagnetic interferences; Electrical properties; Carbon nanotubes; Nanocomposites; Cellular solids; NANOTUBE; CONDUCTIVITY;

D O I：

10.1016/j.actamat.2011.01.065

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electromagnetic (EM) interferences are ubiquitous in modern technologies and impact on the reliability of electronic devices and on living cells. Shielding by EM absorption, which is preferable over reflection in certain instances, requires combining a low dielectric constant with high electrical conductivity, which are antagonist properties in the world of materials. A novel class of hybrid materials for EM absorption in the gigahertz range has been developed based on a hierarchical architecture involving a metallic honeycomb filled with a carbon nanotube-reinforced polymer foam. The waveguide characteristics of the honeycomb combined with the performance of the foam lead to unexpectedly large EM power absorption over a wide frequency range, superior to any known material. The peak absorption frequency can be tuned by varying the shape of the honeycomb unit cell. A closed form model of the EM reflection and absorption provides a tool for the optimization of the hybrid. This designed material sets the stage for a new class of sandwich panels combining high EM absorption with mass efficiency, stiffness and thermal management. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：3255 / 3266

页数：12

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