Effects of surface modification on the dispersion and thermal conductivity of CNT/water nanofluids

被引：74
|
作者：
Ghozatloo, Ahmad [1 ,2 ]
Rashidi, Ali Morad [2 ]
Shariaty-Niasar, Mojtaba [1 ]
机构：
[1] Univ Tehran, Coll Engn, Dept Chem Engn, Transport Phenomena & Nanotechnol Lab, Tehran 111554563, Iran
[2] Res Inst Petr Ind, Nanotechnol Res Ctr, Tehran 146651998, Iran
来源：
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2014年 / 54卷
关键词：
Carbon nanotubes; Nanofluids; Dispersion stability; UV-visible; Thermal conductivity; WALLED CARBON NANOTUBES; SUSPENSIONS;
D O I：
10.1016/j.icheatmasstransfer.2014.02.013
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
In the present work, effects of different surface modification methods (surfactant, acid, base, amide, sulfate) on multi walled carbon nanotubes (CNTs) are studied. The dispersion stability of CNTs in aqueous media was confirmed and the effects of the type of treatment on the thermal conductivity of CNT/water nanofluids were investigated. The surface of the CNTs was modified with acid mixtures (H2SO4-HNO3), potassium persulfate (KPS), tetrahydrofuran (THF), octadecylamine and sodium dodecyl sulfate (SOS). UV-visible spectral data indicate that the CNTs treated first with the acid mixture and then with KPS show the best dispersion stability. The basic treatment and SDS treated CNT/water nanofluids (SDS-KCNT/water) showed the highest conductivity of 0.765 W/mK which increases 24.9% of water as a base fluid conductor. (C) 2014 Elsevier Ltd. All rights reserved.
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页码：1 / 7
页数：7
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