A self-assembled, nacre-mimetic, nano-laminar structure as a superior charge dissipation coating on insulators for HVDC gas-insulated systems

Boya Zhang; Qiang Wang; Yunxiao Zhang; Wenqiang Gao; Yicen Hou; Guixin Zhang

doi:10.1039/c9nr06827a

A self-assembled, nacre-mimetic, nano-laminar structure as a superior charge dissipation coating on insulators for HVDC gas-insulated systems

Boya Zhang^*, Qiang Wang, Yunxiao Zhang, Wenqiang Gao, Yicen Hou, Guixin Zhang

^*Corresponding author for this work

School of Mechatronical Engineering

Research output: Contribution to journal › Article › peer-review

66 Citations (Scopus)

Abstract

Nacre is well-known for its unique properties due to its "bricks-and-mortar" structure. We employed this biological paradigm to fabricate nano-laminar coatings with controlled arrangement of montmorillonite (MMT) nanoclay sheets and polyvinyl alcohol (PVA) polymer binders by a self-assembly process. The abundant inorganic/organic interfaces were demonstrated to play critical roles in enhancing charge dissipation laterally on the insulator surface, so that the surface charge accumulation is suppressed under dc stress. Moreover, the stacking barriers help to protect insulator surfaces from hot electron bombardment, inhibiting further electron avalanche. In this manner, the flashover strength of the insulator is improved by 18%. This strategy is practical and scalable, allowing for industrial applications.

Original language	English
Pages (from-to)	18046-18051
Number of pages	6
Journal	Nanoscale
Volume	11
Issue number	39
DOIs	https://doi.org/10.1039/c9nr06827a
Publication status	Published - 21 Oct 2019

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abstract = "Nacre is well-known for its unique properties due to its {"}bricks-and-mortar{"} structure. We employed this biological paradigm to fabricate nano-laminar coatings with controlled arrangement of montmorillonite (MMT) nanoclay sheets and polyvinyl alcohol (PVA) polymer binders by a self-assembly process. The abundant inorganic/organic interfaces were demonstrated to play critical roles in enhancing charge dissipation laterally on the insulator surface, so that the surface charge accumulation is suppressed under dc stress. Moreover, the stacking barriers help to protect insulator surfaces from hot electron bombardment, inhibiting further electron avalanche. In this manner, the flashover strength of the insulator is improved by 18%. This strategy is practical and scalable, allowing for industrial applications.",

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AU - Wang, Qiang

AU - Zhang, Yunxiao

AU - Gao, Wenqiang

AU - Hou, Yicen

AU - Zhang, Guixin

PY - 2019/10/21

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AB - Nacre is well-known for its unique properties due to its "bricks-and-mortar" structure. We employed this biological paradigm to fabricate nano-laminar coatings with controlled arrangement of montmorillonite (MMT) nanoclay sheets and polyvinyl alcohol (PVA) polymer binders by a self-assembly process. The abundant inorganic/organic interfaces were demonstrated to play critical roles in enhancing charge dissipation laterally on the insulator surface, so that the surface charge accumulation is suppressed under dc stress. Moreover, the stacking barriers help to protect insulator surfaces from hot electron bombardment, inhibiting further electron avalanche. In this manner, the flashover strength of the insulator is improved by 18%. This strategy is practical and scalable, allowing for industrial applications.

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A self-assembled, nacre-mimetic, nano-laminar structure as a superior charge dissipation coating on insulators for HVDC gas-insulated systems

Abstract

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