Flexible polydimethylsiloxane/multi-walled carbon nanotubes membranous metacomposites with negative permittivity

Metacomposites with negative electromagnetic parameters can be promising substitute for periodic metamaterials. In this paper, we devoted to fabricating flexible metacomposite films, which have great potential applications in the field of wearable cloaks, sensing, perfect absorption and stretchable...

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Published in:Polymer (Guilford) Vol. 125; pp. 50 - 57
Main Authors: Sun, Kai, Xie, Peitao, Wang, Zhongyang, Su, Tongming, Shao, Qian, Ryu, JongEun, Zhang, Xihua, Guo, Jiang, Shankar, Akash, Li, Jianfeng, Fan, Runhua, Cao, Dapeng, Guo, Zhanhu
Format: Journal Article
Language:English
Published: Kidlington Elsevier Ltd 08.09.2017
Elsevier BV
Subjects:
Carbon
Complex permittivity
Conduction
Conductivity
Dielectric loss
Dielectrics
Electric dipoles
Electronic devices
Electronic equipment
Flexible metamaterials
Metacomposites
Metamaterials
Multi wall carbon nanotubes
Nanocomposites
Nanotechnology
Nanotubes
Negative permittivity
Particulate composites
Permittivity
Polydimethylsiloxane
Polymerization
Silicone resins
Transportation networks
Wearable technology
Negative permittivity
Flexible metamaterials
Metacomposites
ISSN:0032-3861, 1873-2291
Online Access:Get full text
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Summary:Metacomposites with negative electromagnetic parameters can be promising substitute for periodic metamaterials. In this paper, we devoted to fabricating flexible metacomposite films, which have great potential applications in the field of wearable cloaks, sensing, perfect absorption and stretchable electronic devices. The conductivity and the complex permittivity were investigated in flexible polydimethylsiloxane (PDMS)/multi-walled carbon nanotubes (MWCNTs) membranous nanocomposites, which were fabricated via in-situ polymerization process. With the increase of conductive one-dimension carbon nanotubes concentration, there was a percolation transition observed in conduction due to the formation of continuous networks. The dielectric dispersion behavior was also analyzed in the spectra of complex permittivity. It is indicated that the conduction and polarization make a combined effect on the dielectric loss in flexible PDMS/MWCNTs composites. The negative permittivity with a dielectric resonance was obtained, and was attributed to the induced electric dipoles. [Display omitted] •Flexible conductive polydimethylsiloxane metacomposites were prepared.•Negative permittivity was observed in the nanocomposites.•Induced electric dipoles attributed to the negative permittivity.
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ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2017.07.083