Controlling the dispersion of multi-wall carbon nanotubes in aqueous surfactant solution

被引:642
作者
Yu, Junrong
Grossiord, Nadia
Koning, Cor E.
Loos, Joachim
机构
[1] Eindhoven Univ Technol, Dept Chem Engn, Lab Mat & Interface Chem, NL-5600 MB Eindhoven, Netherlands
[2] Eindhoven Univ Technol, Lab Polymer Technol, NL-5600 MB Eindhoven, Netherlands
[3] Donghua Univ, State Key Lab Modif Chem Fibers & Polymer Mat, Shanghai 200051, Peoples R China
[4] Eindhoven Univ Technol, Polymer Chem Lab, NL-5600 MB Eindhoven, Netherlands
关键词
D O I
10.1016/j.carbon.2006.10.010
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
The sonication-driven dispersion of multi-wall carbon nanotubes (MWCNTs) in aqueous surfactant solution has been monitored by UV-vis spectroscopy and transmission electron microscopy. Time dependent sonication experiments reveal that the maximum achievable dispersion of MWCNTs corresponds to the maximum UV-vis absorbance of the solution. With higher surfactant concentration the dispersion rate of MWCNTs increases and less total sonication energy is required to achieve maximum dispersion. Dispersion of higher MWCNT concentrations requires higher total sonication energy. For effective dispersion the minimum weight ratio of surfactant to MWCNTs is 1.5-1. The surfactant molecules are adsorbed on the surface of the MWCNTs and prevent re-aggregation of MWCNTs so that a colloidal stability of MWCNT dispersions could be maintained for several months. The maximum concentration of MWCNTs that can be homogeneously dispersed in aqueous solution is about 1.4 wt%. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:618 / 623
页数:6
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