Synthesis and properties of a solvent-free MWCNT-based nanofluid

Xi Zhang; Ya Ping Zheng; Lan Lan; Hai Cheng Yang

Synthesis and properties of a solvent-free MWCNT-based nanofluid

Xi Zhang, Ya Ping Zheng, Lan Lan, Hai Cheng Yang

School of Chemistry and Chemical Engineering

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Carboxylic-acid functionalized multiwall carbon nanotubes (MWCNT-COOH) were first modified by (CH₃O)₃Si(CH₂)₃ SO₃H by an esterification reaction of the carboxylic-acid group with a methoxy group, then by hydrolyzing N, N-di(2-hydroxyethoxy)ethyl octadecylamine by an ion exchange reaction to form a quaternary ammonium salt as a soft shell of the MWCNTs. The modified MWCNTs had a larger diameter than the original MWCNTs and their MWCNT content was up to 16.03 wt %. The loss modulus of the modified MWCNTs is bigger than the storage modulus, which is a characteristic of a solvent-free nanofluid. The modified MWNTs can be well dispersed in deionized water and the resulting dispersion is stable. Their seepage threshold value in water is about 5 mg/g.

Original language	English
Pages (from-to)	203-208
Number of pages	6
Journal	Xinxing Tan Cailiao/New Carbon Materials
Volume	29
Issue number	3
State	Published - Jun 2014

Keywords

Carbon nanotubes
Rheology
Solid-liquid behaves
Solvent-free nanofluids

Cite this

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title = "Synthesis and properties of a solvent-free MWCNT-based nanofluid",

abstract = "Carboxylic-acid functionalized multiwall carbon nanotubes (MWCNT-COOH) were first modified by (CH3O)3Si(CH2)3 SO3H by an esterification reaction of the carboxylic-acid group with a methoxy group, then by hydrolyzing N, N-di(2-hydroxyethoxy)ethyl octadecylamine by an ion exchange reaction to form a quaternary ammonium salt as a soft shell of the MWCNTs. The modified MWCNTs had a larger diameter than the original MWCNTs and their MWCNT content was up to 16.03 wt %. The loss modulus of the modified MWCNTs is bigger than the storage modulus, which is a characteristic of a solvent-free nanofluid. The modified MWNTs can be well dispersed in deionized water and the resulting dispersion is stable. Their seepage threshold value in water is about 5 mg/g.",

keywords = "Carbon nanotubes, Rheology, Solid-liquid behaves, Solvent-free nanofluids",

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T1 - Synthesis and properties of a solvent-free MWCNT-based nanofluid

AU - Zhang, Xi

AU - Zheng, Ya Ping

AU - Lan, Lan

AU - Yang, Hai Cheng

PY - 2014/6

Y1 - 2014/6

N2 - Carboxylic-acid functionalized multiwall carbon nanotubes (MWCNT-COOH) were first modified by (CH3O)3Si(CH2)3 SO3H by an esterification reaction of the carboxylic-acid group with a methoxy group, then by hydrolyzing N, N-di(2-hydroxyethoxy)ethyl octadecylamine by an ion exchange reaction to form a quaternary ammonium salt as a soft shell of the MWCNTs. The modified MWCNTs had a larger diameter than the original MWCNTs and their MWCNT content was up to 16.03 wt %. The loss modulus of the modified MWCNTs is bigger than the storage modulus, which is a characteristic of a solvent-free nanofluid. The modified MWNTs can be well dispersed in deionized water and the resulting dispersion is stable. Their seepage threshold value in water is about 5 mg/g.

AB - Carboxylic-acid functionalized multiwall carbon nanotubes (MWCNT-COOH) were first modified by (CH3O)3Si(CH2)3 SO3H by an esterification reaction of the carboxylic-acid group with a methoxy group, then by hydrolyzing N, N-di(2-hydroxyethoxy)ethyl octadecylamine by an ion exchange reaction to form a quaternary ammonium salt as a soft shell of the MWCNTs. The modified MWCNTs had a larger diameter than the original MWCNTs and their MWCNT content was up to 16.03 wt %. The loss modulus of the modified MWCNTs is bigger than the storage modulus, which is a characteristic of a solvent-free nanofluid. The modified MWNTs can be well dispersed in deionized water and the resulting dispersion is stable. Their seepage threshold value in water is about 5 mg/g.

KW - Carbon nanotubes

KW - Rheology

KW - Solid-liquid behaves

KW - Solvent-free nanofluids

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M3 - 文章

AN - SCOPUS:84904868228

SN - 2097-1605

VL - 29

SP - 203

EP - 208

JO - Xinxing Tan Cailiao/New Carbon Materials

JF - Xinxing Tan Cailiao/New Carbon Materials

IS - 3

ER -

Synthesis and properties of a solvent-free MWCNT-based nanofluid

Abstract

Keywords

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