Unusual Dielectric Loss Properties of Carbon Nanotube—Polyvinylidene Fluoride Composites in Low Frequency Region (100 Hz <f <1 MHz)

• 作者: Guang-Lin Zhao Juan Arredondo Yi Zhen
• 来源期刊: 有机高分子材料期刊(英文)
• 学科: 化学
• 关键词: Polymer COMPOSITES Carbon NANOTUBE Dielectric Properties
• 年，卷（期）: 2013,（4）
• 页码范围: 99-103
• 页数: 5页
• 分类号: O6

摘要

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.