Influence of Moisture on Dielectric Properties of Alumina-filled poly(ethylene-co-butyl acrylate) Nanocomposites
2011 (English)Conference paper, Presentation (Refereed)
The dielectric properties of poly(ethylene-co-butyl acrylate) with 13 wt% of butyl acrylate (EBA) filled with alumina nanoparticles (average diameter of 25 nm) were studied as a function of particle coating, filler content (2, 6 and 12 wt %) and relative humidity of the environment used for sample conditioning. The particles were either unmodified or surface treated either with aminopropyltriethoxy silane or octyltriethoxy silane. The samples were conditioned at 24, 56 and 86 % RH in desiccators in room temperature using salt solutions until saturation was reached.
The complex permittivity was measured with an IDA200 dielectric spectroscopy analyzer at applied voltage of 200 Vpeak with frequencies varying between 1 mHz and up to 1 kHz at room temperature.
Dielectric losses measured for pure EBA in both dry and humid conditions show very small variations, while measurements performed on the nanocomposites exhibit distinct loss peaks that depend on the filler content, particle coating and humidity of the environment used for conditioning. The loss peak amplitude depends on the filler content, the shape is determined by the type of coating used and the loss peak frequency is defined by both humidity level and type of coating used.
Place, publisher, year, edition, pages
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-104478OAI: oai:DiVA.org:kth-104478DiVA: diva2:564912
NORD-IS 2011: Nordic Insulation Symposium
QC 201211162012-11-162012-11-052013-02-07Bibliographically approved