Self-healing of electrical damage in polymers using superparamagnetic nanoparticles

Yang Yang, Jinliang He, Qi Li, Lei Gao, Jun Hu, Rong Zeng, Jian Qin, Shan X. Wang, Qing Wang

Research output: Contribution to journalLetter

9 Citations (Scopus)

Abstract

High-voltage power transmission in electrical grids requires reliable and durable dielectric polymers for wire insulation1,2. Electrical treeing caused by high, local electric fields is a damaging process that leads to structure degradation and electrical conduction of dielectric materials, and ultimately, to catastrophic failure of the devices3–5. Here, we demonstrate that the addition of less than 0.1 volume per cent of superparamagnetic nanoparticles into a thermoplastic polymer enables the repair of regions damaged by electrical treeing and the restoration of the insulating properties. Under the application of an oscillating magnetic field, the embedded nanoparticles migrate to the electrical trees and generate a higher local temperature, which heals the electrical tree channels in the polymer. Our method allows us to regenerate the dielectric strength and electrical resistivity over multiple cycles of tree formation and healing, which could be used to increase the lifespan and sustainability of power cables for electronics and energy applications.

Original languageEnglish (US)
Pages (from-to)151-155
Number of pages5
JournalNature nanotechnology
Volume14
Issue number2
DOIs
StatePublished - Feb 1 2019

Fingerprint

healing
Polymers
Nanoparticles
damage
nanoparticles
polymers
electrical resistivity
power transmission
Power transmission
restoration
Thermoplastics
cables
Restoration
Sustainable development
high voltages
Cables
Repair
Electronic equipment
grids
Electric fields

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Yang, Yang ; He, Jinliang ; Li, Qi ; Gao, Lei ; Hu, Jun ; Zeng, Rong ; Qin, Jian ; Wang, Shan X. ; Wang, Qing. / Self-healing of electrical damage in polymers using superparamagnetic nanoparticles. In: Nature nanotechnology. 2019 ; Vol. 14, No. 2. pp. 151-155.
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Yang, Y, He, J, Li, Q, Gao, L, Hu, J, Zeng, R, Qin, J, Wang, SX & Wang, Q 2019, 'Self-healing of electrical damage in polymers using superparamagnetic nanoparticles', Nature nanotechnology, vol. 14, no. 2, pp. 151-155. https://doi.org/10.1038/s41565-018-0327-4

Self-healing of electrical damage in polymers using superparamagnetic nanoparticles. / Yang, Yang; He, Jinliang; Li, Qi; Gao, Lei; Hu, Jun; Zeng, Rong; Qin, Jian; Wang, Shan X.; Wang, Qing.

In: Nature nanotechnology, Vol. 14, No. 2, 01.02.2019, p. 151-155.

Research output: Contribution to journalLetter

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AU - Yang, Yang

AU - He, Jinliang

AU - Li, Qi

AU - Gao, Lei

AU - Hu, Jun

AU - Zeng, Rong

AU - Qin, Jian

AU - Wang, Shan X.

AU - Wang, Qing

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