Surface oxidation and effect of electric field on dispersion and colloids stability of multiwalled carbon nanotubes

被引：62

作者：

Farbod, Mansoor ^{[1
]}

Tadavani, Somayeh Khajehpour ^{[1
]}

Kiasat, Alireza ^{[1
]}

机构：

[1] Shahid Chamran Univ, Dept Phys, Ahvaz, Iran

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2011年 / 384卷 / 1-3期

关键词：

Multiwall carbon nanotubes; Functionalization; Colloidal suspension; AC electric field; POLYANILINE; COMPOSITES; ALIGNMENT;

D O I：

10.1016/j.colsurfa.2011.05.041

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：

Chemical functionalization is a procedure to oxidize the surface of materials. Multiwalled carbon nanotubes (MWCNTs) were purified and functionalized using oxidizing mixture acids (sulfuric and nitric acids). The effect of purification and functionalization on the decrease of MWCNTs length and solubility in polar solvents was studied. The length of MWCNTs decreased when the purification and functionalization time was increased. The functionalization of MWCNTs was confirmed by Raman spectroscopy measurements. It was found that, by functionalization the solubility and colloidal stability of MWCNTs were increased in polar media like water and methanol. We found also dispersion status of functionalized MWCNTs in water is evidently improved by applying an AC electric field of 25 V at low frequency and proper applying time. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：685 / 690

页数：6

共 23 条

[1]

[Anonymous], AAPPS B

[2] Influence of AC electric field on dispersion of carbon nanotubes in liquids [J].