Nano-Al2O3/PANI composites with high negative permittivity

作者：Yao, Xiuchao; Kou, Xuechen; Qiu, Jun^*

来源：Organic Electronics, 2016, 39: 133-137.

DOI：10.1016/j.orgel.2016.09.027

• Negative permittivity
• Nano-Al2O3
• Polyaniline
• Nano composites

Polyaniline (PANI) composites filled with ferroferric oxide and barium titanate were discovered to have metamaterial characteristics in recent years. In this paper, based on micron-Al2O3/PANI composites with negative permittivity, the dielectric properties of nano-Al2O3/PANI composites were studied. Nano-Al2O3/PANI composites had negative permittivity, which was considerably higher than that of PANI and micron-Al2O3/PANI composites. The higher negative permittivity was caused by the better dispersibility of nano-Al2O3, resulting in the enlargement of polarization voltage on a greater range of PANI molecular chain. Moreover, nano-Al2O3/PANI composite with 5 wt% nano-Al2O3 has the largest negative permittivity (-2.24 x 10(6)) that has not been reported so far in oxide/PANI composites.

• 出版日期2016-12
• 单位同济大学