Enhanced Dielectric Constant for Efficient Electromagnetic Shielding Based on Carbon-Nanotube-Added Styrene Acrylic Emulsion Based Composite

Enhanced Dielectric Constant for Efficient Electromagnetic Shielding Based on Carbon-Nanotube-Added Styrene Acrylic Emulsion Based Composite

<p>Abstract</p> <p>An efficient electromagnetic shielding composite based on multiwalled carbon nanotubes (MWCNTs)-filled styrene acrylic emulsion-based polymer has been prepared in a water-based system. The MWCNTs were demonstrated to have an effect on the dielectric constants, wh...

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Bibliographic Details
Main Authors: Chen Changxin, Zhang Song, Ni Yuwei, Cai Seng, Huang Jie, Li Yong, Li Jiang-Tao
Format: Article
Language:English
Published: SpringerOpen 2010-01-01
Series:Nanoscale Research Letters
Subjects:
Multiwalled carbon nanotubes
Electromagnetic interference shielding
Complex permittivity
Styrene acrylic emulsion
Online Access:http://dx.doi.org/10.1007/s11671-010-9621-2
Description
Summary:<p>Abstract</p> <p>An efficient electromagnetic shielding composite based on multiwalled carbon nanotubes (MWCNTs)-filled styrene acrylic emulsion-based polymer has been prepared in a water-based system. The MWCNTs were demonstrated to have an effect on the dielectric constants, which effectively enhance electromagnetic shielding efficiency (SE) of the composites. A low conductivity threshold of 0.23 wt% can be obtained. An EMI SE of ~28 dB was achieved for 20 wt% MWCNTs. The AC conductivity (<it>&#963;</it> <sub>ac</sub>) of the composites, deduced from imaginary permittivity, was used to estimate the SE of the composites in X band (8.2&#8211;12.4 GHz), showing a good agreement with the measured results.</p>
ISSN:1931-7573
1556-276X

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