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 language | English (US) |
|---|---|
| Pages (from-to) | 151-155 |
| Number of pages | 5 |
| Journal | Nature nanotechnology |
| Volume | 14 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 1 2019 |
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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
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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 journal › Letter
TY - JOUR
T1 - Self-healing of electrical damage in polymers using superparamagnetic nanoparticles
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
PY - 2019/2/1
Y1 - 2019/2/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85059445336&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85059445336&partnerID=8YFLogxK
U2 - 10.1038/s41565-018-0327-4
DO - 10.1038/s41565-018-0327-4
M3 - Letter
C2 - 30598524
AN - SCOPUS:85059445336
VL - 14
SP - 151
EP - 155
JO - Nature Nanotechnology
JF - Nature Nanotechnology
SN - 1748-3387
IS - 2
ER -