A study of the stability of aqueous suspensions of functionalized carbon nanotubes

被引：3
|
作者：
Zakharychev, E. A. [1 ]
Kabina, M. A. [1 ]
Razov, E. N. [2 ]
Semenycheva, L. L. [1 ]
机构：
[1] Lobachevsky Nizhny Novgorod State Univ, Pr Gagarina 23, Nizhnii Novgorod 603950, Russia
[2] Russian Acad Sci, Inst Machine Construct Problems, Ul Belinskogo 85, Nizhnii Novgorod 603024, Russia
来源：
COLLOID JOURNAL | 2016年 / 78卷 / 05期
关键词：
SURFACE; DISPERSION; OXIDATION; CHEMISTRY;
D O I：
10.1134/S1061933X16050240
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 properties of aqueous suspensions of carbon nanotubes have been studied as depending on the conditions of their functionalization in a mixture of sulfuric and nitric acids. The elemental composition and contents of carboxyl, lactone, and hydroxyl groups in carbon nanotubes have been determined at different durations and temperatures of functionalization. The influence of functionalization conditions on the value of the electrokinetic potential of carbon nanotubes in aqueous suspensions and the nanotube solubility in water has been investigated. It has been found that the absolute value of the electrokinetic potential of nanotubes and their solubility in water increase with both the duration and temperature of functionalization due to a rise in the number of functional groups on their surface. The optimal regimes of functionalization of carbon nanotubes have been determined from the point of view of preserving their structure and stability in aqueous dispersions.
引用
收藏
页码：602 / 607
页数：6
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