Effect of multi-walled carbon nanotube aspect ratio on mechanical and electrical properties of epoxy-based nanocomposites

被引：243
作者：
Ayatollahi, M. R. [1 ]
Shadlou, S. [1 ]
Shokrieh, M. M. [2 ]
Chitsazzadeh, M. [3 ]
机构：
[1] Iran Univ Sci & Technol, Fatigue & Fracture Res Lab, Ctr Excellence Expt Solid Mech & Dynam, Sch Mech Engn, Tehran 1684613114, Iran
[2] Iran Univ Sci & Technol, Composites Res Lab, Ctr Excellence Expt Solid Mech & Dynam, Sch Mech Engn, Tehran 1684613114, Iran
[3] Iran Univ Sci & Technol, Nanocomposites Res Lab, Iran Composites Inst, Tehran 1684613114, Iran
来源：
POLYMER TESTING | 2011年 / 30卷 / 05期
关键词：
Nanocomposites; MWNT aspect ratio; Mechanical properties; Electrical properties; COMPOSITES; BEHAVIOR; CRYSTALLIZATION; ENHANCEMENT; PERCOLATION; PARTICLES; POLYMERS;
D O I：
10.1016/j.polymertesting.2011.04.008
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effects of the aspect ratio of multi-walled carbon nanotube (MWNT) on the mechanical and electrical properties of epoxy/MWNT nanocomposites were studied. It was found that the MWNT aspect ratio has a significant effect on both electrical and mechanical properties of nanocomposites with significantly better properties for MWNTs of smaller diameter. The trend of the results was justified based on the mechanisms involved. A new percolation threshold concept was also introduced based on the aspect ratio of MWNTs. In addition, a correction factor for the Halpin-Tsai model was proposed which could greatly improve the theoretical predictions. The states of MWNT dispersion, bridging structure and fracture surface roughness were also investigated and a correlation was found between these features and the experimental results. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：548 / 556
页数：9
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