Synergistic impact of mesoporous Zn/Al-LDH nanorods for developing dielectric and thermal properties of epoxy as insulation in GIS/GIL
M. Ramadan, Mahmoud Ezzat, Mousa. A. Abd-Allah, S. M. A. El-Gamal, Abdelrahman Said
TL;DR
This paper explores how adding Zn/Al-LDH nanorods improves epoxy's performance as insulation in high-voltage systems like GIS/GIL.
Contribution
The study introduces Zn/Al-LDH nanorods as a novel functional filler to enhance epoxy's dielectric and thermal properties.
Findings
Zn/Al-LDH nanorods increased epoxy's breakdown strength by 24% at 5 wt% loading.
Thermal stability improved with a 3°C increase in glass transition temperature at 5 wt%.
Dielectric loss and DC conductivity were significantly reduced with optimal filler loading.
Abstract
Gas-insulated switchgear (GIS) and transmission lines (GIL) depend on epoxy spacers to ensure electrical reliability under high-voltage stress. Yet, the limited dielectric strength and thermal tolerance of neat epoxy constrain its long-term applicability. This work investigates Zn/Al layered double hydroxide (LDH) nanoparticles as functional fillers for epoxy insulation. The nanofillers were synthesized by co-precipitation, surface-functionalized for improved compatibility, and incorporated into epoxy at loadings of 1–7 wt%. Structural, thermal, dielectric, and breakdown properties were systematically assessed. The Zn/Al-LDH exhibited a mesoporous nanostructure with high surface area (~ 98.9 m2/g) and uniform dispersion in the matrix, increasing epoxy structural ordering from 21.1% to 28.9%. Thermal stability improved as the char yield rose from 14% (neat epoxy) to 17.1% at 5 wt%, while…
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Taxonomy
TopicsHigh voltage insulation and dielectric phenomena · Dielectric materials and actuators · Power Transformer Diagnostics and Insulation