Method of assessment of varnishes modified with nanofillers

The method of analysis and assessment of the results of investigations of nanofilled varnishes used for electrical insulation have been presented. The proposed method enabled consideration of an effect of the coating thickness. The investigation indicated that improving of the bond strength depends on loading and the size of nanoparticles. The method of fabrication of composites with nanoparticles has an influence on their properties. Composites with fumed silica showed improved dielectric properties. Absorption of water of all formulated varnishes with nanofillers decreases provided that some additives were incorporated.