Study on the thermal conductivity and rheological properties of carboxyl (-COOH) functionalized multi-walled carbon nanotube (MWCNT)-dowtherm a nanofluids

被引：0

作者：

Premalatha M. ^{[1
]}

Kingson Solomon Jeevaraj A. ^{[2
]}

机构：

[1] Department of Physics, Karpagam College of Engineering, Coimbatore, 641032, Tamil Nadu

[2] Department of Physics, LRG Government Arts College (W), Tirupur, 641604, Tamil Nadu

来源：

Kingson Solomon Jeevaraj, A. | 2018年 / American Scientific Publishers卷 / 12期

关键词：

Carbon nanotubes; Dowtherm A; Sonication; Thermal conductivity; Viscosity;

D O I：

10.1166/jbns.2018.1529

中图分类号：

学科分类号：

摘要：

In the present work, the thermal conductivity and viscosity studies of carboxyl (-COOH) functionalized multi-walled carbon nanotubes-DowthermA (eutectic mixture of biphenyl (C 12 H 10 ) and diphenyl oxide (C 12 H 10 O)) nanofluids are discussed. As-received carboxyl (-COOH) functionalized MWCNTs are characterized using X-ray diffraction (XRD), FT-Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR), Transmission electron microscopy (TEM) and TGA-DTG/DSC analysis. Carboxyl (-COOH) functionalized MWCNT-Dowtherm A nanofluids are prepared in different concentration ranges from 0.001 to 0.005 g of MWCNT and characterized at various temperatures 303 K to 323 K. The thermal conductivity of carboxyl (-COOH) functionalized MWCNT-Dowtherm A nanofluids increases with the concentration of carbon nanotubes as well as with temperature. The possible mechanism for the enhancement observed may be ascribed to the percolation of heat through the nanotubes to form a tri-dimensional network. Also, as the temperature increases the viscosity of the nanofluid decreases, which results in an increase in Brownian motion of nanoparticles, this sets convection like effects resulting in enhanced thermal conductivity. Copyright © 2018 American Scientific Publishers All rights reserved.

引用

页码：370 / 377

页数：7

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