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Flexible multi-walled carbon nanotubes/polydimethylsiloxane membranous composites toward high-permittivity performance

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Abstract

As reported, flexible composites with high-permittivity performance have played a significance role in thin-film capacitors, stretchable electronic devices, etc. However, the flexibility of traditional high-permittivity composites with metal particles or conductive polymers was damaged near percolation threshold. In this work, an in situ polymerization process was used to prepare the flexible percolating multi-walled carbon nanotubes/polydimethylsiloxane (MWCNTs/PDMS) membranes. Meanwhile, the high-permittivity performance w as observed when the MWCNTs content was near but not exceeded the percolation threshold, attributing to the Maxwell-Wagner-Sillars effect. As MWCNTs content increased, the conduction mechanism of the MWCNTs/PDMS composites was changed from the hopping conduction to metal-like conduction, the conductivity values were enhanced as well, and thus, the main dielectric loss resulted from the ohmic dissipation. Furthermore, the tensile strength and elongation results demonstrated that the membranes were flexible and had good mechanical properties. This work not only revealed the mechanism of high permittivity in percolating composites but also promoted the applications of flexible high-permittivity membranes in capacitors, electromagnetic interference shielding, microwave absorption, and so on.

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Funding

This work was financially supported by the National Natural Science Foundation of China (Grant No. 51803119, 51871146, and 51771108), and “Chenguang Program” was supported by Shanghai Education Development Foundation and Shanghai Municipal Education Commission (Grant No. 18CG56), the Innovation Program of Shanghai Municipal Education Commission (Grant No. 2019-01-07-00-10-E00053), and the Science and Technology Commission of Shanghai Municipality (Grant No. 18DZ1112900).

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Authors and Affiliations

  1. College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, 201306, People’s Republic of China

    Zongxiang Wang, Xiaofeng Li, Linying Wang, Yaping Li, Jinyuan Qin, Kai Sun & Runhua Fan

  2. College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, People’s Republic of China

    Peitao Xie

  3. Department of Optical Science and Engineering, Fudan University, Shanghai, 200433, People’s Republic of China

    Yunpeng Qu

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  1. Zongxiang Wang
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  2. Xiaofeng Li
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  3. Linying Wang
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  4. Yaping Li
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  8. Kai Sun
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  9. Runhua Fan
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Correspondence to Kai Sun.

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Wang, Z., Li, X., Wang, L. et al. Flexible multi-walled carbon nanotubes/polydimethylsiloxane membranous composites toward high-permittivity performance. Adv Compos Hybrid Mater 3, 1–7 (2020). https://doi.org/10.1007/s42114-020-00144-6

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  • DOI: https://doi.org/10.1007/s42114-020-00144-6

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