Stability and thermal conductivity enhancement of Carbon nanotube (CNT) nanofluid using gum Arabic

This experimental study reports on the stability and thermal conductivity enhancement of carbon nanotubes (CNTs) nanofluids with and without gum arabic (GA). The stability of CNT in the presence of GA dispersant in water is systematically investigated by taking into account the combined effect of va...

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Main Authors:	Rashmi, W., Ismail, Ahmad Faris, Sopyan, Iis, Jameel, Ahmed Tariq, Yusof, Faridah, Khalid, M., Mubarak, N. M.
Format:	Article
Language:	English
Published:	Taylor & Francis 2011
Subjects:	TK Electrical engineering. Electronics Nuclear engineering
Online Access:	http://irep.iium.edu.my/12064/ http://irep.iium.edu.my/12064/ http://irep.iium.edu.my/12064/ http://irep.iium.edu.my/12064/4/Stability_and_Thermal_Conductivity_Enhancement_of_Carbon_nanotube_%28CNT%29_Nanofluid_Using_Gum_Arabic.pdf

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spelling	iium-120642013-08-01T02:41:05Z http://irep.iium.edu.my/12064/ Stability and thermal conductivity enhancement of Carbon nanotube (CNT) nanofluid using gum Arabic Rashmi, W. Ismail, Ahmad Faris Sopyan, Iis Jameel, Ahmed Tariq Yusof, Faridah Khalid, M. Mubarak, N. M. TK Electrical engineering. Electronics Nuclear engineering This experimental study reports on the stability and thermal conductivity enhancement of carbon nanotubes (CNTs) nanofluids with and without gum arabic (GA). The stability of CNT in the presence of GA dispersant in water is systematically investigated by taking into account the combined effect of various parameters, such as sonication time, temperature, dispersant and particle concentration. The concentrations of CNT and GA have been varied from 0.01 to 0.1 wt% and from 0.25 to 5 wt%, respectively, and the sonication time has been varied in between 1 and 24 h. The stability of nanofluid is measured in terms of CNT concentration as a function of sediment time using UV-Vis spectrophotometer. Thermal conductivity of CNT nanofluids is measured using KD-2 prothermal conductivity meter from 25 to 60°C. Optimum GA concentration is obtained for the entire range of CNT concentration and 1–2.5 wt% of GA is found to be sufficient to stabilise all CNT range in water. Rapid sedimentation of CNTs is observed at higher GA concentration and sonication time. CNT in aqueous suspensions show strong tendency to aggregation and networking into clusters. Stability and thermal conductivity enhancement of CNT nanofluids have been presented to provide a heat transport medium capable of achieving high heat conductivity. Increase in CNT concentrations resulted in the non-linear thermal conductivity enhancement. More than 100–250% enhancement in thermal conductivity is observed for the range of CNT concentration and temperature. Taylor & Francis 2011-07-14 Article PeerReviewed application/pdf en http://irep.iium.edu.my/12064/4/Stability_and_Thermal_Conductivity_Enhancement_of_Carbon_nanotube_%28CNT%29_Nanofluid_Using_Gum_Arabic.pdf Rashmi, W. and Ismail, Ahmad Faris and Sopyan, Iis and Jameel, Ahmed Tariq and Yusof, Faridah and Khalid, M. and Mubarak, N. M. (2011) Stability and thermal conductivity enhancement of Carbon nanotube (CNT) nanofluid using gum Arabic. Journal of Experimental Nanoscience, 6 (6). pp. 567-579. ISSN 1745-8099 http://www.tandfonline.com/doi/abs/10.1080/17458080.2010.487229 10.1080/17458080.2010.487229
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TK Electrical engineering. Electronics Nuclear engineering
spellingShingle	TK Electrical engineering. Electronics Nuclear engineering Rashmi, W. Ismail, Ahmad Faris Sopyan, Iis Jameel, Ahmed Tariq Yusof, Faridah Khalid, M. Mubarak, N. M. Stability and thermal conductivity enhancement of Carbon nanotube (CNT) nanofluid using gum Arabic
description	This experimental study reports on the stability and thermal conductivity enhancement of carbon nanotubes (CNTs) nanofluids with and without gum arabic (GA). The stability of CNT in the presence of GA dispersant in water is systematically investigated by taking into account the combined effect of various parameters, such as sonication time, temperature, dispersant and particle concentration. The concentrations of CNT and GA have been varied from 0.01 to 0.1 wt% and from 0.25 to 5 wt%, respectively, and the sonication time has been varied in between 1 and 24 h. The stability of nanofluid is measured in terms of CNT concentration as a function of sediment time using UV-Vis spectrophotometer. Thermal conductivity of CNT nanofluids is measured using KD-2 prothermal conductivity meter from 25 to 60°C. Optimum GA concentration is obtained for the entire range of CNT concentration and 1–2.5 wt% of GA is found to be sufficient to stabilise all CNT range in water. Rapid sedimentation of CNTs is observed at higher GA concentration and sonication time. CNT in aqueous suspensions show strong tendency to aggregation and networking into clusters. Stability and thermal conductivity enhancement of CNT nanofluids have been presented to provide a heat transport medium capable of achieving high heat conductivity. Increase in CNT concentrations resulted in the non-linear thermal conductivity enhancement. More than 100–250% enhancement in thermal conductivity is observed for the range of CNT concentration and temperature.
format	Article
author	Rashmi, W. Ismail, Ahmad Faris Sopyan, Iis Jameel, Ahmed Tariq Yusof, Faridah Khalid, M. Mubarak, N. M.
author_facet	Rashmi, W. Ismail, Ahmad Faris Sopyan, Iis Jameel, Ahmed Tariq Yusof, Faridah Khalid, M. Mubarak, N. M.
author_sort	Rashmi, W.
title	Stability and thermal conductivity enhancement of Carbon nanotube (CNT) nanofluid using gum Arabic
title_short	Stability and thermal conductivity enhancement of Carbon nanotube (CNT) nanofluid using gum Arabic
title_full	Stability and thermal conductivity enhancement of Carbon nanotube (CNT) nanofluid using gum Arabic
title_fullStr	Stability and thermal conductivity enhancement of Carbon nanotube (CNT) nanofluid using gum Arabic
title_full_unstemmed	Stability and thermal conductivity enhancement of Carbon nanotube (CNT) nanofluid using gum Arabic
title_sort	stability and thermal conductivity enhancement of carbon nanotube (cnt) nanofluid using gum arabic
publisher	Taylor & Francis
publishDate	2011
url	http://irep.iium.edu.my/12064/ http://irep.iium.edu.my/12064/ http://irep.iium.edu.my/12064/ http://irep.iium.edu.my/12064/4/Stability_and_Thermal_Conductivity_Enhancement_of_Carbon_nanotube_%28CNT%29_Nanofluid_Using_Gum_Arabic.pdf
first_indexed	2023-09-18T20:21:16Z
last_indexed	2023-09-18T20:21:16Z
_version_	1777408123332460544

Stability and thermal conductivity enhancement of Carbon nanotube (CNT) nanofluid using gum Arabic

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