Water-soluble SWCNTs from sulfonation of nanotube-bound polystyrene

被引：30

作者：

Li, Huaming

Adronov, Alex

机构：

[1] McMaster Univ, Dept Chem, Hamilton, ON L8S 4M1, Canada

[2] McMaster Univ, Brockhouse Inst Mat Res, Hamilton, ON L8S 4M1, Canada

[3] Xiangtan Univ, Chem Coll, Inst Polymer Sci, Xiangtan, Hunan Province, Peoples R China

来源：

CARBON | 2007年 / 45卷 / 05期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

WALLED CARBON NANOTUBES; SOLUBILIZATION; FUNCTIONALIZATION; SURFACE; CHEMISTRY; POLYMERS;

D O I：

10.1016/j.carbon.2006.12.022

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：

Polystyrene functionalized SWCNTs, prepared by copper(I) catalyzed click coupling of alkyne-decorated SWCNTs with well-defined, azide-terminated polystyrene, were transformed to water-soluble structures through sulfortation of the grafted polystyrene chains. The degree of polystyrene sulfortation was varied from 20 to 34 mol%, and was found to be directly proportional to the aqueous solubility of the material. The resulting sulfonated polystyrene-functionalized SWCNTs (SPS-SWCNTs) were found to be pH responsive, forming homogeneous solutions in water at pH values between 3 and 13. Outside of this pH range, the SPS-SWCNTs rapidly precipitate from solution. In addition, it was found that nanotube aggregation could be significantly reduced at high pH, where the sulfonate groups led to electrostatic repulsion between nanotubes. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：984 / 990

页数：7

共 37 条

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