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Process for producing paraffin base carbonaceous nano-tube nano-fluid

A nanofluid and carbon nanotube technology, applied in chemical instruments and methods, heat exchange materials, dyed low-molecular organic compound treatment, etc., can solve problems such as easy precipitation, limited practical application in the field of heat exchange, and poor stability of nanofluids , to achieve the effect of long stable time, uniform dispersion and high thermal conductivity

Inactive Publication Date: 2009-07-29
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Summary
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AI Technical Summary

Problems solved by technology

[0005] At present, the method used to prepare alkane-based nanofluids containing carbon nanotubes is to add a dispersant to disperse the carbon nanotubes directly into the alkane-based fluid. Practical applications in the field of heat transfer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Mix oleylamine and n-octane at a volume ratio of 2% and 97.9%, then add 0.1% volume ratio of surface hydroxylated and truncated and shortened multi-walled carbon nanotubes, and ultrasonically vibrate to obtain alkane The carbon nanotube-containing nanofluid exists stably for more than two months, and its thermal conductivity is 2% higher than that of n-octane.

Embodiment 2

[0012] Example 2: Mix oleylamine and n-octane at a volume ratio of 5% and 94%, and then add 1.0% volume ratio of surface hydroxylated and truncated and shortened multi-walled carbon nanotubes. After ultrasonic vibration, the obtained alkane The carbon nanotube-based nanofluid exists stably for more than one month, and its thermal conductivity is 15% higher than that of n-octane.

Embodiment 3

[0013] Example 3: Mix oleylamine and n-octane at a volume ratio of 3.5% and 96%, then add 0.5% volume ratio of surface hydroxylated and truncated and shortened multi-walled carbon nanotubes, and ultrasonically vibrate to obtain alkane The carbon nanotube-based nanofluid exists stably for more than one month, and its thermal conductivity is 10% higher than that of n-octane.

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PUM

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Abstract

A method for preparing alkyl containing carbon nano tube nano-fluid is characterized by comprising the components based on volume ratio: 0.1-1.0% of carbon nano tube with surface hydroxylation, 94-97.9% of alkane and 2-5% of dispersant; first, the alkane is directly mixed together with the dispersant according to the proportion; then, after being treated by strong base ball milling, the carbon nano tube with surface hydroxylation is added into the mixture according to the proportion; after that, supersonic vibration is carried out, and alkyl nano-fluid which can stably suspend as well as effectively transfer heat and cool. The dispersant is lipophilic dispersant which is selected from oleyl amine or Tween. The alkane is normal octane or n-dodecane. Compared with the prior art, the method has the advantages of even dispersion of the nano-fluid, long stable time and high coefficient of heat conductivity. Especially, when the volume ratio of the carbon nano tube in the nano-fluid is 1.0%, the coefficient of heat conductivity of the nano-fluid is over 15% more than that of the alkane.

Description

technical field [0001] The invention relates to a preparation method of an enhanced heat transfer cooling working medium used in a heat exchange system, in particular to a preparation method of alkane-based carbon nanotube-containing nanofluid with high thermal conductivity and stable suspension. Background technique [0002] With the increasing heat transfer load and heat transfer intensity of the heat exchange system, the heat transfer medium with low heat transfer performance has become the main obstacle restricting the development of high-load heat transfer and enhanced heat transfer technology under special conditions, especially in energy , chemical industry, microelectronics, information and other fields. Therefore, the development of high-efficiency heat transfer fluids with high thermal conductivity and good heat transfer performance has become a research hotspot. [0003] At present, nanofluids are more researched, which refers to the dispersion of metal or non-me...

Claims

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Application Information

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IPC IPC(8): C09K5/10C09C1/44C09C3/08
Inventor 陈立飞谢华清
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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