Superior electromagnetic interference shielding and dielectric properties of carbon nanotube composites through the use of high aspect ratio CNTs and three-roll milling

被引：76

作者：

Theilmann, Paul ^{[1
]}

Yun, Dong-Jin ^{[2
]}

Asbeck, Peter ^{[1
]}

Park, Sung-Hoon ^{[2
]}

机构：

[1] Univ Calif San Diego, Dept Elect Engn, La Jolla, CA 92093 USA

[2] Samsung Adv Inst Technol, Adv Mat Res Ctr, Yougin 446712, Gyeonggi, South Korea

来源：

ORGANIC ELECTRONICS | 2013年 / 14卷 / 06期

关键词：

Carbon nanotube; Polymer composites; Three-roll milling; Electromagnetic interference shielding; Dielectric; POLYMER COMPOSITES; EPOXY COMPOSITES; CONDUCTIVE COMPOSITES; NANOCOMPOSITES; RESISTIVITY; ABSORPTION; FIBERS; VOLUME;

D O I：

10.1016/j.orgel.2013.02.029

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report superior electromagnetic interference shielding and dielectric properties of carbon nanotube (CNT) composites achieved through the use of high aspect ratio CNTs and three-roll milling. Highly entangled CNTs are separated and then evenly dispersed within the polymer matrix using three horizontally positioned rotating rolls that apply a strong shear force to the composite. Very high aspect ratio CNTs combined with an effective fabrication process result in a low percolation threshold (similar to 0.06 vol%) and excellent electromagnetic interference (EMI) shielding efficiency (SE). The achieved SE is one of highest ever reported for the given CNT loading and measurement conditions. A model consisting of a network of resistors and capacitors formed within the nanocomposite was used to describe the microwave properties of the multi-walled carbon nanotubes/polydimethylsiloxane composites (MWNT/PDMS). Enhancement of this network is attained through the use of high aspect ratio CNTs and a fabrication process that evenly disperses and randomly orients this filler within the PDMS. (C) 2013 Elsevier B. V. All rights reserved.

引用

页码：1531 / 1537

页数：7

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