Abstract

The present work investigates the percentage weight change in alumina tri-hydrate (ATH) and boron nitride (BN) doped room temperature vulcanized (RTV) silicone rubber (SiR) nanocomposites during the absorption process when dipped in acidic nitric acid solution. Applicability of the Fickian and Langmuir diffusion model was tested for the obtained diffusion data and the results were analyzed using the same. Further, the air-drying behaviour of the nanocomposites was also monitored. The dependency of liquid absorption and drying on filler weight percentage (1%, 3%, 5%, 7%, and 10%) is reported. The combined effect of liquid permeation and air drying in weight change of SiR nanocomposites specimens was analyzed Finally, the optimized nanocomposite formulation with the best resistance against liquid permeation induced insulation degradation is suggested.

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