Abstracts Book - IMRC 2018

• SB1-P102
CTAB AS COMPATIBILIZER IN COMPOSITES SILICONE RUBBER-
BaTiO3 FOR OUTDORR HIGH-VOLTAGE APPLICATIONS
Brenda Edith García Caudillo 1
1 Instituto Politécnico Nacional - IPN - ESIQIE, , Mexico.
Silicone rubber (Polydimetil Siloxane) is a good material for insulators in outdoor
high voltage applications because it has lower density, higher resistivity and
hidrophovicity as compared to the conventional porcelain and glass insulators.
However above certain voltage level if an electric stress relive technique is not
used, this type of insulator is prone to suffer damage in zones near the end
metal fittings due to high electic field. One strategy to the diminish the electric
field is the incremend in the permitivity of the housing material combined with
changes in the insolator profile. The increment in the permitivity can be
accomplished by the use of high the electric constant ceramic filers, such as
BaTiO3 (BT), but it has a hydrophilic character, so to improve the adherence
between silicone and BT a compatibilizer is required in this work, the effect of
cetyltrimethilammonium bromide (CTAB) as surfactant on the surfase of BT
particles and on the electrical properties of silicone-BT composites, is reported.
Dispersion studies were carried out in aqueous suspensions. To corroborate
that the surfactant remains attached to BT particles during manufacture,
confocal microscopy was used. It is shown how the electrical properties as well
as the filler dispersion were improved by the use of CTAB.
Acknowledgment:
In this work the effect of cetyltrimethylammonium bromide as a surfactant is
reported.
Silicone rubber (Polydimethyl Siloxane) is a good material for insulators in high
voltage applications.
However, above a certain voltage level if an electrical stress relieve technique is
not use, this type of insulation is prone to damage due to an electric field.
A strategy to decrease the electric field is the increase in the permitivity of the
material.