NANO-STRUCTURED AMORPHOUS ALUMINA MODIFIED EPOXY COMPOSITES WITH ENHANCED AC BREAKDOWN STRENGTH

摘要

The invention describes the processing and fabrication of nanostructured alumina modified epoxy resin-based polymer composites with enhanced AC breakdown strength (BDV) for high voltage electrical insulation applications. Nanostructured alumina which is amorphous and also porous thus having a very low tap density in the range of 0.01 - 0.39/cc, is functionalized with liquid silane along with a polymeric hardener liquid in the epoxy resin system and then treated with epoxy resin, accelerator and flexibilizer in a pre- defined weight ratio followed by heat treatment and curing in order to derive the nanostructured amorphous alumina modified epoxy composites. The nanostructured amorphous alumina modified epoxy composites show enhancement of AC breakdown strength in the range of 17 - 32% depending on the load of the nanostructured amorphous alumina in the epoxy resin composite matrix. The nanostructured amorphous alumina modified epoxy composites have the potential for using as various components/sub-components in the area of high voltage electrical insulation applications.