压力对聚苯胺导电性的影响

Effect of High Pressure on the Conductivity of Polyaniline

1.
Institute of Physics, Academia Sinica, Beijing 100080, China;
2.
Institute of Chemistry, Academia Sinica, Beijing 100080, China;
3.
Organic Solids Laboratory, Institute of Chemistry, Academia Sinica, Beijing 100080, China

摘要: 导电高聚物聚苯胺薄膜经过定向拉伸后，其有序度、电导及跃迁势垒都发生了很大变化。本文研究了准静水压力对定向拉伸前后，聚苯胺薄膜电学性质的影响。发现未定向拉伸的聚苯胺薄膜的电导随压力单调增加，跃迁势垒T0随压力单调减少，而定向拉伸后的聚苯胺薄膜则在0.47 GPa出现电导的极大值，在0.35~0.71 GPa之间出现T0的极小值，这个异常行为与聚乙炔、聚噻吩等导电高聚物均不相同。
- 导电高聚物 /
- 化学掺杂 /
- 定向拉伸 /
- 跃迁势垒T0
Abstract: For conducting polymer polyaniline (PANI) the degree of ordering, conductivity and hopping barrier changes greatly after oriented stretching. In this paper we have studied the effect of hydrcotatic high pressure on the electrical property of oriented and unoriented PANI films. We find that for unoriented PANI film, the conductivity is monotonously increased and hopping barrier T0 is monotonously decreased with the increase of pressure, on the other hand for oriented PANI film the conductivity shows a maximum at 0.47 GPa and T0 shows a minimum between 0.35~0.71 GPa. This anomalous behaviour is different from other conducting polymers, such as polyacetylene, polythiophine, etc.
- conducting polymer /
- Chemical dopping /
- oriented stretch /
- hopping barrier T0