ABSTRACT
Nanocomposite insulation materials that have small amounts of homogenous dispersed inorganic fillers of nanometer dimensions (nanofiller) in a polymer matrix show insulation properties far superior to those of the original polymer, which one of their attractive characteristics. A nanofiller has a much larger surface than a micro-filler. For the same filler content, the strong interaction between nanofiller surfaces and polymer seems to improve the properties of the nanocomposite compared to the interaction attributed to micro-fillers. However, there are concerns about harmful effects of nanomaterials on the human body and the environment because they are extremely small. Generally, the assessment of risks (1) to worker, via environment, via product, and of accident is necessary. Since most nanocomposites are still in the research and development stage, "risk to worker" should be the primary concern. In handling nanofillers, it is very important to use their positive aspects as well as to ensure safety in the research stage and in practical use.
