211 / 2018-09-17 15:34:20

Voltage stabilizer functionalized silica nanoparticles for significantly enhanced dielectric and thermal properties of potential thermoplastic cable insulation

Voltage stabilizer;,nanoparticles,thermoplastic cable insulation

In this study, recyclable cable insulation which can withstand HVDC electrical stress was successfully prepared by incorporating newly synthesized voltage stabilizer functionalized silica nanoparticles into a thermoplastic isotactic polypropylene. The introduction of voltage stabilizer functionalized nanoparticles resulted in significantly enhanced breakdown strength, suppressed space charge injection and greatly improved thermal stability. For example, the breakdown strength was increased by about 46% by adding 4 wt% voltage stabilizer functionalized silica. Surface potential decay, crystallinity and supramolecular structure of the polypropylene nanocomposites were measured and the improved electrical properties were mainly attributed to the shallow traps introduced by the voltage stabilizer functionalized silica. This investigation paved a new way for developing environmental-friendly HVDC cable insulation.