Suppression of space charge in crosslinked polyethylene filled with poly(stearyl methacrylate)-grafted SiO2 nanoparticles

Ling Zhang, Mohammad M. Khani, Timothy Michael Krentz, Yanhui Huang, Yuanxiang Zhou, Brian C. Benicewicz, J. Keith Nelson, Linda S. Schadler

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Incorporating inorganic nanoparticles (NPs) into polymer matrices provides a promising solution for suppressing space charge effects that can lead to premature failure of electrical insulation used in high voltage direct current engineering. However, realizing homogeneous NP dispersion is a great challenge especially in high-molecular-weight polymers. Here, we address this issue in crosslinked polyethylene by grafting matrix-compatible polymer brushes onto spherical colloidal SiO2 NPs (10-15 nm diameter) to obtain a uniform NP dispersion, thus achieving enhanced space charge suppression, improved DC breakdown strength, and restricted internal field distortion (≤10.6%) over a wide range of external DC fields from −30 kV/mm to −100 kV/mm at room temperature. The NP dispersion state is the key to ensuring an optimized distribution of deep trapping sites. A well-dispersed system provides sufficient charge trapping sites and shows better performance compared to ones with large aggregates. This surface ligand strategy is attractive for future nano-modification of many engineering insulating polymers.

Original languageEnglish (US)
Article number132903
JournalApplied Physics Letters
Volume110
Issue number13
DOIs
StatePublished - Mar 27 2017

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polyethylenes
space charge
retarding
nanoparticles
direct current
polymers
trapping
engineering
electrical insulation
brushes
matrices
high voltages
molecular weight
breakdown
ligands
room temperature

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Zhang, L., Khani, M. M., Krentz, T. M., Huang, Y., Zhou, Y., Benicewicz, B. C., ... Schadler, L. S. (2017). Suppression of space charge in crosslinked polyethylene filled with poly(stearyl methacrylate)-grafted SiO2 nanoparticles. Applied Physics Letters, 110(13), [132903]. https://doi.org/10.1063/1.4979107

Suppression of space charge in crosslinked polyethylene filled with poly(stearyl methacrylate)-grafted SiO2 nanoparticles. / Zhang, Ling; Khani, Mohammad M.; Krentz, Timothy Michael; Huang, Yanhui; Zhou, Yuanxiang; Benicewicz, Brian C.; Nelson, J. Keith; Schadler, Linda S.

In: Applied Physics Letters, Vol. 110, No. 13, 132903, 27.03.2017.

Research output: Contribution to journalArticle

Zhang, L, Khani, MM, Krentz, TM, Huang, Y, Zhou, Y, Benicewicz, BC, Nelson, JK & Schadler, LS 2017, 'Suppression of space charge in crosslinked polyethylene filled with poly(stearyl methacrylate)-grafted SiO2 nanoparticles', Applied Physics Letters, vol. 110, no. 13, 132903. https://doi.org/10.1063/1.4979107
Zhang, Ling ; Khani, Mohammad M. ; Krentz, Timothy Michael ; Huang, Yanhui ; Zhou, Yuanxiang ; Benicewicz, Brian C. ; Nelson, J. Keith ; Schadler, Linda S. / Suppression of space charge in crosslinked polyethylene filled with poly(stearyl methacrylate)-grafted SiO2 nanoparticles. In: Applied Physics Letters. 2017 ; Vol. 110, No. 13.
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