Temperature dependence of the electrical conductivity of epoxy/expanded graphite nanosheet composites

被引：92
作者：
Jovic, N. [1 ,2 ]
Dudic, D. [1 ]
Montone, A. [2 ]
Antisari, M. Vittori [2 ]
Mitric, M. [1 ]
Djokovic, V. [1 ]
机构：
[1] Vinca Inst Nucl Sci, Belgrade 11001, Serbia
[2] CR Casaccia, FIM Dept, ENEA, I-00060 Rome, Italy
来源：
SCRIPTA MATERIALIA | 2008年 / 58卷 / 10期
关键词：
electrical resistivity/conductivity; scanning electron microscopy (SEM); polymer matrix composites; nanocomposite; electrical properties;
D O I：
10.1016/j.scriptamat.2007.12.041
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The electrical conductivity of composites obtained by mixing epoxy resin and expanded graphite (EG) nanosheets has been investigated. Conductivity changes of up to I I orders of magnitude were observed as the filler load increased from 0 to 8 wt.%, while the percolation threshold was around 3 wt.%. It was also shown that epoxy/EG composites with intermediate filler contents exhibit a "phase transition" from predominantly "contact conductivity" to "tunneling conductivity" during heating from room temperature to 120 degrees C. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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收藏
页码：846 / 849
页数：4
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