Correlation of carbon nanotube dispersability in aqueous surfactant solutions and polymers

被引：106

作者：

Krause, Beate ^{[1
]}

Petzold, Gudrun ^{[1
]}

Pegel, Sven ^{[1
]}

Poetschke, Petra ^{[1
]}

机构：

[1] Leibniz Inst Polymer Res Dresden, D-01069 Dresden, Germany

来源：

CARBON | 2009年 / 47卷 / 03期

关键词：

DISPERSION; SUSPENSIONS; COMPOSITES; PYROLYSIS; STABILITY;

D O I：

10.1016/j.carbon.2008.10.040

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：

In order to assess the dispersability of carbon nanotube materials, tubes produced under different synthesis conditions were dispersed in aqueous surfactant solutions and the sedimentation behaviour under centrifugation forces was investigated using a LUMiFuge stability analyzer. The electrical percolation threshold of the nanotubes after melt mixing in polyamide 6.6 was determined and the state of dispersion was studied. As a general tendency, the nanotubes having better aqueous dispersion stability showed lower electrical percolation threshold and better nanotube dispersion in the composites. This indicates that the investigation of the stability of aqueous dispersions is also able to give information about the nanotubes inherent dispersability, in polymer melts, both strongly influenced by the entanglement and agglomerate structure of the tubes within the as-produced nanotube materials. The shape of the nanotubes in the aqueous dispersions was assessed using a SYSMEX flow particle image analyzer and found to correspond to the shape observed from cryofractured surfaces of the polymer composites. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：602 / 612

页数：11

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