TITLE:
Unusual Dielectric Loss Properties of Carbon Nanotube—Polyvinylidene Fluoride Composites in Low Frequency Region (100 Hz
AUTHORS:
Yi Zhen, Juan Arredondo, Guang-Lin Zhao
KEYWORDS:
Polymer Composites; Carbon Nanotube; Dielectric Properties
JOURNAL NAME:
Open Journal of Organic Polymer Materials,
Vol.3 No.4,
October
30,
2013
ABSTRACT:
Systematic investigations on the dielectric properties
of multi-walled carbon nanotubes (MWNTs)-polyvinylidene fluoride
(PVDF) composites with a wide MWNT concentration range (2 - 9 wt%)
have been carried out. It is revealed that the dielectric constant is increased by the addition of an appropriate amount of MWNTs at room
temperature. However, when the concentration of MWNTs in the composites reaches
above 5 wt%, negative dielectric constants and large dielectric
loss in the composites are observed in the low frequency range. The
ferroelectric CNT-PVDF polymer composites containing more than 5 wt% MWNTs have a
strong dielectric absorption, which has the potential for acoustic applications.