Enhanced thermal conductivity of water with surfactant encapsulated and individualized single-walled carbon nanotube dispersions

Harish Sivasankaran, Kei Ishikawa, Erik Einarsson, Taiki Inoue, Shohei Chiashi, Junichiro Shiomi, Shigeo Maruyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In the present work, the effective thermal conductivity of single walled carbon nanotube dispersions in water was investigated experimentally. Single-walled carbon nanotubes (SWNTs) were synthesized using the alcohol catalytic chemical vapour deposition method. The diameter distribution of the SWNTs was determined using resonance Raman spectroscopy. Sodium deoxycholate (SDC) was used as the surfactant to prepare the nanofluid dispersions. Photoluminescence excitation spectroscopy (PLE) reveals that majority of the nanotubes were highly individualized when SDC was employed as the surfactant. The nanofluid dispersions were further characterized using transmission electron microscopy, atomic force microscopy (AFM) and optical absorption spectroscopy (OAS). Thermal conductivity measurements were carried out using a transient hot wire technique. Nanotube loading of up to 0.3 vol% was used. Thermal conductivity enhancement was found to be dependent on nanotube volume fraction and temperature. At room temperature the thermal conductivity enhancement was found to be non-linear and a maximum enhancement of 13.8% was measured at 0.3 vol% loading. Effective thermal conductivity was increased to 51% at 333 K when the nanotube loading is 0.3 vol%. Classical macroscopic models fail to predict the measured thermal conductivity enhancement precisely. The possible mechanism for the enhancement observed is attributed to the percolation of nanotubes to form a three-dimensional structure. Indirect effects of Brownian motion may assist the formation of percolating networks at higher temperature thereby leading to further enhancements at higher temperature.

Original languageEnglish
Title of host publicationASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012
Pages145-153
Number of pages9
DOIs
Publication statusPublished - Dec 1 2012
EventASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012 - Atlanta, GA, United States
Duration: Mar 3 2012Mar 6 2012

Publication series

NameASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012

Other

OtherASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012
CountryUnited States
CityAtlanta, GA
Period3/3/123/6/12

Fingerprint

Single-walled carbon nanotubes (SWCN)
Dispersions
Surface-Active Agents
Thermal conductivity
Surface active agents
Nanotubes
Water
Deoxycholic Acid
Sodium
Temperature
Brownian movement
Absorption spectroscopy
Light absorption
Raman spectroscopy
Chemical vapor deposition
Atomic force microscopy
Volume fraction
Photoluminescence
Alcohols
Spectroscopy

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes

Cite this

Sivasankaran, H., Ishikawa, K., Einarsson, E., Inoue, T., Chiashi, S., Shiomi, J., & Maruyama, S. (2012). Enhanced thermal conductivity of water with surfactant encapsulated and individualized single-walled carbon nanotube dispersions. In ASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012 (pp. 145-153). (ASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012). https://doi.org/10.1115/MNHMT2012-75021

Enhanced thermal conductivity of water with surfactant encapsulated and individualized single-walled carbon nanotube dispersions. / Sivasankaran, Harish; Ishikawa, Kei; Einarsson, Erik; Inoue, Taiki; Chiashi, Shohei; Shiomi, Junichiro; Maruyama, Shigeo.

ASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012. 2012. p. 145-153 (ASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Sivasankaran, H, Ishikawa, K, Einarsson, E, Inoue, T, Chiashi, S, Shiomi, J & Maruyama, S 2012, Enhanced thermal conductivity of water with surfactant encapsulated and individualized single-walled carbon nanotube dispersions. in ASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012. ASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012, pp. 145-153, ASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012, Atlanta, GA, United States, 3/3/12. https://doi.org/10.1115/MNHMT2012-75021
Sivasankaran H, Ishikawa K, Einarsson E, Inoue T, Chiashi S, Shiomi J et al. Enhanced thermal conductivity of water with surfactant encapsulated and individualized single-walled carbon nanotube dispersions. In ASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012. 2012. p. 145-153. (ASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012). https://doi.org/10.1115/MNHMT2012-75021
Sivasankaran, Harish ; Ishikawa, Kei ; Einarsson, Erik ; Inoue, Taiki ; Chiashi, Shohei ; Shiomi, Junichiro ; Maruyama, Shigeo. / Enhanced thermal conductivity of water with surfactant encapsulated and individualized single-walled carbon nanotube dispersions. ASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012. 2012. pp. 145-153 (ASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012).
@inproceedings{89160ea10b704136b0bb12749ff95613,
title = "Enhanced thermal conductivity of water with surfactant encapsulated and individualized single-walled carbon nanotube dispersions",
abstract = "In the present work, the effective thermal conductivity of single walled carbon nanotube dispersions in water was investigated experimentally. Single-walled carbon nanotubes (SWNTs) were synthesized using the alcohol catalytic chemical vapour deposition method. The diameter distribution of the SWNTs was determined using resonance Raman spectroscopy. Sodium deoxycholate (SDC) was used as the surfactant to prepare the nanofluid dispersions. Photoluminescence excitation spectroscopy (PLE) reveals that majority of the nanotubes were highly individualized when SDC was employed as the surfactant. The nanofluid dispersions were further characterized using transmission electron microscopy, atomic force microscopy (AFM) and optical absorption spectroscopy (OAS). Thermal conductivity measurements were carried out using a transient hot wire technique. Nanotube loading of up to 0.3 vol{\%} was used. Thermal conductivity enhancement was found to be dependent on nanotube volume fraction and temperature. At room temperature the thermal conductivity enhancement was found to be non-linear and a maximum enhancement of 13.8{\%} was measured at 0.3 vol{\%} loading. Effective thermal conductivity was increased to 51{\%} at 333 K when the nanotube loading is 0.3 vol{\%}. Classical macroscopic models fail to predict the measured thermal conductivity enhancement precisely. The possible mechanism for the enhancement observed is attributed to the percolation of nanotubes to form a three-dimensional structure. Indirect effects of Brownian motion may assist the formation of percolating networks at higher temperature thereby leading to further enhancements at higher temperature.",
author = "Harish Sivasankaran and Kei Ishikawa and Erik Einarsson and Taiki Inoue and Shohei Chiashi and Junichiro Shiomi and Shigeo Maruyama",
year = "2012",
month = "12",
day = "1",
doi = "10.1115/MNHMT2012-75021",
language = "English",
isbn = "9780791854778",
series = "ASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012",
pages = "145--153",
booktitle = "ASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012",

}

TY - GEN

T1 - Enhanced thermal conductivity of water with surfactant encapsulated and individualized single-walled carbon nanotube dispersions

AU - Sivasankaran, Harish

AU - Ishikawa, Kei

AU - Einarsson, Erik

AU - Inoue, Taiki

AU - Chiashi, Shohei

AU - Shiomi, Junichiro

AU - Maruyama, Shigeo

PY - 2012/12/1

Y1 - 2012/12/1

N2 - In the present work, the effective thermal conductivity of single walled carbon nanotube dispersions in water was investigated experimentally. Single-walled carbon nanotubes (SWNTs) were synthesized using the alcohol catalytic chemical vapour deposition method. The diameter distribution of the SWNTs was determined using resonance Raman spectroscopy. Sodium deoxycholate (SDC) was used as the surfactant to prepare the nanofluid dispersions. Photoluminescence excitation spectroscopy (PLE) reveals that majority of the nanotubes were highly individualized when SDC was employed as the surfactant. The nanofluid dispersions were further characterized using transmission electron microscopy, atomic force microscopy (AFM) and optical absorption spectroscopy (OAS). Thermal conductivity measurements were carried out using a transient hot wire technique. Nanotube loading of up to 0.3 vol% was used. Thermal conductivity enhancement was found to be dependent on nanotube volume fraction and temperature. At room temperature the thermal conductivity enhancement was found to be non-linear and a maximum enhancement of 13.8% was measured at 0.3 vol% loading. Effective thermal conductivity was increased to 51% at 333 K when the nanotube loading is 0.3 vol%. Classical macroscopic models fail to predict the measured thermal conductivity enhancement precisely. The possible mechanism for the enhancement observed is attributed to the percolation of nanotubes to form a three-dimensional structure. Indirect effects of Brownian motion may assist the formation of percolating networks at higher temperature thereby leading to further enhancements at higher temperature.

AB - In the present work, the effective thermal conductivity of single walled carbon nanotube dispersions in water was investigated experimentally. Single-walled carbon nanotubes (SWNTs) were synthesized using the alcohol catalytic chemical vapour deposition method. The diameter distribution of the SWNTs was determined using resonance Raman spectroscopy. Sodium deoxycholate (SDC) was used as the surfactant to prepare the nanofluid dispersions. Photoluminescence excitation spectroscopy (PLE) reveals that majority of the nanotubes were highly individualized when SDC was employed as the surfactant. The nanofluid dispersions were further characterized using transmission electron microscopy, atomic force microscopy (AFM) and optical absorption spectroscopy (OAS). Thermal conductivity measurements were carried out using a transient hot wire technique. Nanotube loading of up to 0.3 vol% was used. Thermal conductivity enhancement was found to be dependent on nanotube volume fraction and temperature. At room temperature the thermal conductivity enhancement was found to be non-linear and a maximum enhancement of 13.8% was measured at 0.3 vol% loading. Effective thermal conductivity was increased to 51% at 333 K when the nanotube loading is 0.3 vol%. Classical macroscopic models fail to predict the measured thermal conductivity enhancement precisely. The possible mechanism for the enhancement observed is attributed to the percolation of nanotubes to form a three-dimensional structure. Indirect effects of Brownian motion may assist the formation of percolating networks at higher temperature thereby leading to further enhancements at higher temperature.

UR - http://www.scopus.com/inward/record.url?scp=84882297566&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84882297566&partnerID=8YFLogxK

U2 - 10.1115/MNHMT2012-75021

DO - 10.1115/MNHMT2012-75021

M3 - Conference contribution

AN - SCOPUS:84882297566

SN - 9780791854778

T3 - ASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012

SP - 145

EP - 153

BT - ASME 2012 3rd International Conference on Micro/Nanoscale Heat and Mass Transfer, MNHMT 2012

ER -