TUTCRIS - Tampereen teknillinen yliopisto


Effect of Silica Modification on Charge Trapping Behavior of PP blend/Silica Nanocomposites



Otsikko2019 2nd International Conference on Electrical Materials and Power Equipment (ICEMPE)
ISBN (elektroninen)978-1-5386-8434-4
DOI - pysyväislinkit
TilaJulkaistu - 7 huhtikuuta 2019
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaInternational Conference on Electrical Materials and Power Equipment - Guangzhou, Kiina
Kesto: 7 huhtikuuta 201910 huhtikuuta 2019


ConferenceInternational Conference on Electrical Materials and Power Equipment
Kaupunki Guangzhou


Various dielectric nanocomposite materials are studied in the frame of the European Commission funded project GRIDABLE. This project has the aim to develop DC cable extruded insulation and medium and low voltage DC capacitor films exhibiting enhanced performance with respect to presently used materials. The nanocomposites intended for cable applications are based on polypropylene (PP) blends filled with surface modified nano-silica particles. The surface modification is carried out via the state-of-the-art solution method using a polar silane as the modifying agent. Thermally Stimulated Depolarization Current (TSDC) measurements were carried out in order to study the charge trapping behavior of the nanocomposite samples. TSDC results indicate that the addition of the treated nano-silica, for most cases, reduces the density of the deep traps significantly. While more detailed studies are necessary, these results imply that the depth and the density of the deep trap states is profoundly influenced by the level of the silica modification i.e. the amount of the grafted silane on the silica surface.