Hierarchical morphology of carbon single-walled nanotubes during sonication in an aliphatic diamine

被引：60

作者：

Brown, JM ^{[1
]}

Anderson, DP

Justice, RS

Lafdi, K

Belfor, M

Strong, KL

Schaefer, DW

机构：

[1] USAF, Res Lab, Mat & Mfg Directorate, MLBCO,WPAFB, Wright Patterson AFB, OH 45433 USA

[2] Univ Dayton, Res Inst, Dayton, OH 45469 USA

[3] Univ Cincinnati, Dept Chem & Mat Engn, Cincinnati, OH 45221 USA

来源：

POLYMER | 2005年 / 46卷 / 24期

关键词：

small-angle scattering; single-walled carbon nanotubes; hierarchical morphology;

D O I：

10.1016/j.polymer.2005.08.089

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Dispersion of single-walled carbon nanotubes (SWNTs) by sonication into diamine curing agents is studied as a means to improve the dispersion of SWNTs in cured epoxy. Cured and uncured specimens are analyzed by light microscopy, electron microscopy, light scattering (LS), ultra small-angle X-ray scattering (USAXS), electrical conductivity and Raman spectroscopy. A flexible diamine (D2000) forms a stable SWNT suspension leading to good homogeneity in both the diamine and the cured epoxy. High resolution transmission electron microscopy (TEM) shows that small ropes of SWNTs (mostly under 15 nm) are present despite the sample's visual homogeneity. Further morphological investigation of cured and uncured D2000 resins using light and small-angle X-ray scattering indicates that the SWNTs are networked into fractal clusters that electrically percolate at low SWNTs loadings (0.05 wt%). Published by Elsevier Ltd.

引用

页码：10854 / 10865

页数：12

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