Thermal Conductivity and Photothermal Conversion Performance of Ethylene Glycol-Based Nanofluids Containing Multiwalled Carbon Nanotubes

In this study, the successful hydroxyl functionalization of carbon nanotubes (MWCNT-OH) was prepared by chemical treatments and characterized by Raman and FTIR spectra. MWCNT-OH was successfully dispersed into ethylene glycol (EG) with the Tween-80 surfactant by an ultrasonication method to prepare...

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Published inJournal of nanomaterials Vol. 2018; no. 2018; pp. 1 - 8
Main Authors Hung Thang, Bui, Hong, Phan Ngoc, Hong, Nguyen Tuan, Anh, Nguyen Ngoc, Van Trinh, Pham, Nguyen, Trong Tam, Minh, Phan Ngoc
Format Journal Article
LanguageEnglish
Published Cairo, Egypt Hindawi Publishing Corporation 01.01.2018
Hindawi
Hindawi Limited
Subjects
Applied physics
Carbon
Chemical treatment
Chemical vapor deposition
Energy resources
Ethylene glycol
Heat conductivity
Heat transfer
Investigations
Lighting
Microscopy
Multi wall carbon nanotubes
Nanofluids
Nanomaterials
Nanoparticles
Organic chemistry
Photothermal conversion
Researchers
Solar energy
Surfactants
Thermal conductivity
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Summary:In this study, the successful hydroxyl functionalization of carbon nanotubes (MWCNT-OH) was prepared by chemical treatments and characterized by Raman and FTIR spectra. MWCNT-OH was successfully dispersed into ethylene glycol (EG) with the Tween-80 surfactant by an ultrasonication method to prepare nanofluids. Thermal conductivity of nanofluid was investigated, and a maximum thermal conductivity enhancement about 24% at 50°C was obtained with nanofluid containing 0.64 vol.% MWCNT concentration. The photothermal conversion performance of nanofluid was also investigated by measuring the change of the temperature under lighting from a solar simulator. The measurement results showed that the highest photothermal conversion was obtained about 4.2% after a 30 min lighting with nanofluid containing 0.48 vol.% CNT concentration compared to ethylene glycol. These obtained results have propose a potential application of CNTs in nanofluids for solar absorption.
ISSN:1687-4110
1687-4129
DOI:10.1155/2018/2750168