TY  - JOUR
A1  - Saleem, H.
A1  - Thunga, M.
A1  - Kollosche, Matthias
A1  - Kessler, M. R.
A1  - Laflamme, S.
T1  - Interfacial treatment effects on behavior of soft nano-composites for highly stretchable dielectrics
JF  - Polymer : the international journal for the science and technology of polymers
N2  - We investigate the influence of interfacial treatment on the matrix filler interaction using a melt mixing process to fabricate robust and highly stretchable dielectrics. Silicone oil and silane coupling agent are studied as possible solutions to enhance the compatibility between the inorganic fillers and polymer matrix. Morphology, thermomechanical and dielectric behavior of the prepared specimens are studied. Results show that specimens filled with silicone oil coated particles have promising dielectric and thermal properties. The mechanical properties reveal a stiffness enhancement by 67% with a high strain at break of 900%. The relative permittivity of the specimens prepared with silicone oil increased by 45% as observed from the dielectric analysis. (C) 2014 Elsevier Ltd. All rights reserved.
KW  - Dielectric materials
KW  - Permittivity
KW  - Surface treatment
Y1  - 2014
U6  - https://doi.org/10.1016/j.polymer.2014.06.054
SN  - 0032-3861
SN  - 1873-2291
VL  - 55
IS  - 17
SP  - 4531
EP  - 4537
PB  - Elsevier
CY  - Oxford
ER  - 
TY  - GEN
A1  - Gerhard, Reimund
T1  - Dielectric materials for electro-active (electret) and/or electro-passive (insulation) applications
T2  - 2nd International Conference on Electrical Materials and Power Equipment (ICEMPE 2019)
N2  - Dielectric materials for electret applications usually have to contain a quasi-permanent space charge or dipole polarization that is stable over large temperature ranges and time periods. For electrical-insulation applications, on the other hand, a quasi-permanent space charge or dipole polarization is usually considered detrimental. In recent years, however, with the advent of high-voltage direct-current (HVDC) transmission and high-voltage capacitors for energy storage, new possibilities are being explored in the area of high-voltage dielectrics. Stable charge trapping (as e.g. found in nano-dielectrics) or large dipole polarizations (as e.g. found in relaxor ferroelectrics and high-permittivity dielectrics) are no longer considered to be necessarily detrimental in electrical-insulation materials. On the other hand, recent developments in electro-electrets (dielectric elastomers), i.e. very soft dielectrics with large actuation strains and high breakdown fields, and in ferroelectrets, i.e. polymers with electrically charged cavities, have resulted in new electret materials that may also be useful for HVDC insulation systems. Furthermore, 2-dimensional (nano-particles on surfaces or interfaces) and 3-dimensional (nano-particles in the bulk) nano-dielectrics have been found to provide very good charge-trapping properties that may not only be used for more stable electrets and ferroelectrets, but also for better HVDC electrical-insulation materials with the possibility to optimize charge-transport and field-gradient behavior. In view of these and other recent developments, a first attempt will be made to review a small selection of electro-active (i.e. electret) and electro-passive (i.e. insulation) dielectrics in direct comparison. Such a comparative approach may lead to synergies in materials concepts and research methods that will benefit both areas. Furthermore, electrets may be very useful for sensing and monitoring applications in electrical-insulation systems, while high-voltage technology is essential for more efficient charging and poling of electret materials.
KW  - Dielectric materials
KW  - Electrets
KW  - Electrical insulation
KW  - Electro-active and electro-passive dielectrics
KW  - Nano-dielectrics
KW  - Charging or poling
KW  - Charge storage and transport
Y1  - 2019
SN  - 978-1-5386-8434-4
SN  - 978-1-5386-8435-1
U6  - https://doi.org/10.1109/ICEMPE.2019.8727276
SP  - 91
EP  - 96
PB  - IEEE
CY  - New York
ER  -