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- Title
Enhanced Dielectric Constant for Efficient Electromagnetic Shielding Based on Carbon-Nanotube-Added Styrene Acrylic Emulsion Based Composite.
- Authors
Yong Li; Changxin Chen; Jiang-Tao Li; Song Zhang; Yuwei Ni; Seng Cai; Jie Huang
- Abstract
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 ( σac) of the composites, deduced from imaginary permittivity, was used to estimate the SE of the composites in X band (8.2–12.4 GHz), showing a good agreement with the measured results.
- Subjects
ELECTRIC conductivity; ELECTROMAGNETIC interference; POLYMERS; ELECTROMAGNETIC waves; CARBON nanotubes; PERMITTIVITY
- Publication
Nanoscale Research Letters, 2010, Vol 5, Issue 7, p1170
- ISSN
1931-7573
- Publication type
Article
- DOI
10.1007/s11671-010-9621-2