Shear-SANS study of single-walled carbon nanotube suspensions

被引：21

作者：

Wang, H

Christopherson, GT

Xu, ZY

Porcar, L

Ho, DL

Fry, D

Hobbie, EK

机构：

[1] Michigan Technol Univ, Dept Mat Sci & Engn, Houghton, MI 49931 USA

[2] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA

[3] Natl Inst Stand & Technol, Div Polymers, Gaithersburg, MD 20899 USA

来源：

CHEMICAL PHYSICS LETTERS | 2005年 / 416卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.cplett.2005.09.044

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：

We report a combined shear small-angle neutron scattering (shear-SANS) and rheo-optical study of dilute aqueous suspensions of SWNT bundles dispersed using ionic surfactants. Both shear-SANS and flow birefringence reveal weak shear-induced alignment of SWNT bundles along the direction of flow. In terms of a nematic order parameter, the degree of alignment is found to increase with the shear rate, reaching ca. 0.08 at 2000 s(-1). Addition of a soluble polymer to the SWNT suspensions diminishes shear-induced alignment. The factors limiting shear alignment in dilute SWNT suspensions are discussed. (c) 2005 Elsevier B.V. All rights reserved.

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页码：182 / 186

页数：5

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