Increasing the electrical conductivity of carbon nanotube/polymer composites by using weak nanotube-polymer interactions

被引：92
|
作者：
Zeng, You [1 ,2 ]
Liu, Pengfei [2 ]
Du, Jinhong [1 ]
Zhao, Long [2 ]
Ajayan, Pulickel M. [3 ]
Cheng, Hui-Ming [1 ]
机构：
[1] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
[2] Shenyang Jianzhu Univ, Sch Mat Sci & Engn, Shenyang 110168, Peoples R China
[3] Rice Univ, Dept Mech Engn & Mat Sci, Houston, TX 77005 USA
来源：
CARBON | 2010年 / 48卷 / 12期
关键词：
FILLED POLYMER; BLACK; CRYSTALLIZATION; NANOCOMPOSITES; TRANSPORT;
D O I：
10.1016/j.carbon.2010.05.053
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A weak interaction between carbon nanotubes (CNTs) and polymers was found to reduce polymer-wrapping on CNT surface, decrease the contact resistance between CNTs, and increase the electrical conductivity of their composites. Thermodynamic properties such as surface energy of components, filler-polymer interactions, and wettability of carbon/polymer systems were analyzed. It was found that the graphitized CNTs filled polyoxymethylene (POM) system exhibits the weakest CNT-polymer interaction among all the investigated systems and a poor wettability. Consequently, the graphitized CNT/POM composites possess a high electrical conductivity and a low percolation threshold of 0.5 wt.% CNT loading, which is associated with the weak CNT-polymer interaction, low contact resistance between CNTs, good connectivity of CNT networks, and high crystallinity of POM in the composites. The results obtained imply that high-performance composites with optimal CNT-network structures can be designed and fabricated by fully considering the surface properties of components and CNT-polymer interactions. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3551 / 3558
页数：8
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