Highly dispersed carbon nanotube reinforced cement based materials

被引：837

作者：

Konsta-Gdoutos, Maria S. ^{[1
]}

Metaxa, Zoi S. ^{[1
,2
]}

Shah, Surendra P. ^{[2
]}

机构：

[1] Democritus Univ Thrace, Dept Civil Engn, GR-67100 Xanthi, Greece

[2] Northwestern Univ, Ctr Adv Cement Based Mat, Evanston, IL 60208 USA

来源：

CEMENT AND CONCRETE RESEARCH | 2010年 / 40卷 / 07期

关键词：

Carbon nanotubes; Dispersion; Mechanical properties; Scanning electron microscopy (SEM); Fiber reinforcement; MECHANICAL-PROPERTIES; MICROSTRUCTURE;

D O I：

10.1016/j.cemconres.2010.02.015

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The remarkable mechanical properties of carbon nanotubes (CNT) suggest that they are ideal candidates for high performance cementitious composites. The major challenge however, associated with the incorporation of CNTs in cement based materials is poor dispersion. In this study, effective dispersion of different length multiwall carbon nanotubes (MWCNTs) in water was achieved by applying ultrasonic energy and in combination with the use of a surfactant. The effects of ultrasonic energy and surfactant concentration on the dispersion of MWCNTs at an amount of 0.08 wt.% of cement were investigated. It is shown that for proper dispersion the application of ultrasonic energy is absolutely required and for complete dispersion there exists an optimum weight ratio of surfactant to CNTs. For a constant ratio of surfactant to MWCNTs, the effects of MWCNT type (short and long) and concentration on the fracture properties, nanoscale properties and microstructure of nanocomposite materials were also studied. Results suggest that MWCNTs improve the nano- and macromechanical properties of cement paste. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1052 / 1059

页数：8

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