Recoverable and self-healing electromagnetic wave absorbing nanocomposites

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Xingyi Dai
  • Yuzhang Du
  • Jiye Yang
  • Ding Wang
  • Junwei Gu
  • Yifan Li
  • Ben B. Xu
  • Jie Kong

Detail(s)

Original languageEnglish
Pages (from-to)27-32
Journal / PublicationComposites Science and Technology
Volume174
Online published19 Feb 2019
Publication statusPublished - 12 Apr 2019
Externally publishedYes

Abstract

Recent advancements in electronics engineering require materials with the resiliency and sustainability to extend their life time. With this regard, we presented a sustainable multi-functional nanocomposites strategy by introducing dynamic imine bonds based polyazomethine (PAM) as molecular interconnects and Fe3O4-loaded multiwalled carbon nanotubes as electromagnetic (EM) wave absorbing units. Driven by the reversible dynamic imine bonds, our materials show robust spontaneous self-healing with excellent healing efficiencies of 95% for PAM and 90% for nanocomposite, and an accelerated recovery under a moderate mechanical stimulus. By adding Fe3O4-loaded multiwalled carbon nanotubes, the hybrids show excellent EM wave absorbing properties with 50% increment on minimum reflection coefficient (−40.6 dB) than the reported value. We demonstrate a full degradability by decomposing a nanocomposite sheet of 100 mg in an acidic solution within 90 min at room temperature. The nanofillers and monomers after degradation can be re-used to synthesis nanocomposites. The testing results for recoverable nanocomposites show a good retention on mechanical property. This novel strategy may shed a light on the downstream applications in EM wave absorbing devices and smart structures with great potential to accelerate circular economy.

Research Area(s)

  • Dynamic covalent bonds, Electromagnetic wave absorption, Recycling, Reprocessing, Self-healing

Citation Format(s)

Recoverable and self-healing electromagnetic wave absorbing nanocomposites. / Dai, Xingyi; Du, Yuzhang; Yang, Jiye; Wang, Ding; Gu, Junwei; Li, Yifan; Wang, Steven; Xu, Ben B.; Kong, Jie.

In: Composites Science and Technology, Vol. 174, 12.04.2019, p. 27-32.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal