Experimental observation on the flow-induced assembly of Carbon nanotube suspensions to form helical bands
Experimental observation on the flow-induced assembly of Carbon nanotube suspensions to form helical bands
复制标题
DOI：
10.1007/s00397-007-0183-x
复制
发表时间：
2007-03
期刊：
影响因子：
2.3
通讯作者：
A. Ma;M. Mackley;S. Rahatekar
中科院分区：
文献类型：
--
作者：
A. Ma;M. Mackley;S. Rahatekar
本文介绍了光学观察的方式聚集体的多壁碳纳米管（CNT）在环氧树脂基体中可以形成不寻常的螺旋带（HB），垂直于剪切流对齐。通过施加特定的流动条件，HB形成从悬浮在基本上牛顿环氧树脂基质中的CNT的各向同性聚集体。光学和匹配的流变学数据一起提出了一个示意性的模型的方式HB的形成。发现CNT悬浮液的稳定剪切流变性在观察到的微观结构变化期间基本上没有变化。HB结构在CNT的潜在应用方面可能具有相关性。
This paper describes optical observations on the way aggregates of multi-walled carbon nanotubes (CNTs) in an epoxy matrix can form unusual helical bands (HBs) that are aligned perpendicular to the shear flow. By applying specific flow conditions, HBs were formed from isotropic aggregates of CNTs suspended in an essentially Newtonian epoxy matrix. Both optical and matching rheological data are presented together with a schematic model of the way HBs are formed. It was discovered that the steady shear rheology of the CNT suspension did not substantially change during the observed micro-structure change. The HB structure may have relevance in terms of potential applications for CNTs.