N-octadecane phase change micro-emulsion as well as preparation method and application thereof

A technology of phase change microemulsion and n-octadecane, which is applied in the field of microemulsion and its preparation, can solve the problems of low fluid center temperature, high fluid viscosity, stratification, etc., and achieve a wide applicable temperature range, simple and broad preparation method The effect of applying the foreground

Inactive Publication Date: 2013-06-12
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the cooling medium used for heat dissipation in microchannels is mainly water. Although water has a larger specific heat compared with general cooling fluids, its thermal conductivity and specific heat capacity are still low under the conditions of high heat flux density and limited pump work. It looks too small, the heat dissipation efficiency is limited, and the consumption is very large, which still cannot meet the actual needs
In order to improve the apparent specific heat of the cooling medium, the method currently used is to disperse organic solid-liquid phase change materials in the base liquid to prepare phase change microcapsule suspensions, phase change emulsions, etc., but the phase change microcapsule s

Method used

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  • N-octadecane phase change micro-emulsion as well as preparation method and application thereof
  • N-octadecane phase change micro-emulsion as well as preparation method and application thereof
  • N-octadecane phase change micro-emulsion as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0025] A kind of n-octadecane phase change microemulsion of the present invention, described phase change microemulsion is made up of the component of following mass fraction:

[0026] n-octadecane 5%~40%,

[0027] Surfactant 2%~20%,

[0028] Fatty alcohols 1% to 10%,

[0029] Inorganic salts 0.25% to 3% and

[0030] remaining water.

[0031] The above-mentioned surfactants are preferably one or more compounded surfactants with a hydrophilic-lipophilic balance value (HLB value) greater than or equal to 8.

[0032] In the above-mentioned n-octadecane phase-change microemulsion, the surfactant is an industrial grade agent, specifically Tween80, Tween60, Tween40, Tween20, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, dodecane Sodium sulfate, sodium dodecylbenzenesulfonate, Turkish red oil, polyoxyethylene castor oil series (EL20, 30, 35, 40, 60, 80), polyoxyethylene hydrogenated castor oil series (CO40, RH40), One or more of sodium stearyl sulfate, ...

Embodiment 2

[0037] a kind of like figure 1 The n-octadecane phase change microemulsion of the present invention is shown, the phase change microemulsion includes 5g n-octadecane (98% AR grade), 0.97g octadecyl polyoxyethylene ether phosphate (technical grade), 0.15g Tween60, 1.5g n-pentanol, 0.53gNaCl and 10g water (ordinary drinking water is enough).

[0038]The preparation method of the n-octadecane phase-change microemulsion of the present embodiment comprises the following steps: first mix the stearyl polyoxyethylene ether phosphate of the above-mentioned quality, Tween60 and 2.5g n-amyl alcohol, and then add the above-mentioned quality Mix n-octadecane and NaCl in a 35°C water bath, add the remaining water, the system gradually changes from turbid to clear and transparent, and leave it at room temperature to obtain the n-octadecane phase-change microemulsion. The n-octadecane content in the emulsion is about 28wt.%. Use Mastersizer2000 laser particle size analyzer to test this prod...

Embodiment 3

[0040] A n-octadecane phase change microemulsion of the present invention, the phase change microemulsion includes 5g n-octadecane (98% AR grade), 0.88g castor oil polyoxyethylene ether (EL40), 1.25g RH40, 3.3 g n-butanol, 0.58g NaCl and 24g water (ordinary drinking water is sufficient).

[0041] The preparation method of the n-octadecane phase-change microemulsion of this embodiment includes the following steps: firstly mix the above-mentioned quality of EL40, RH40 and n-butanol evenly, then add the above-mentioned quality of n-octadecane and NaCl, and put it in a water bath at 35°C Stir evenly, add the rest of the water system gradually from turbid to clear and transparent, and stand at room temperature to obtain the n-octadecane phase-change microemulsion. The n-octadecane content in the phase-change microemulsion is about 14wt.%. Mastersizer2000 laser particle size analyzer test the particle size distribution of dispersed droplets in the phase change microemulsion is 10nm ...

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Abstract

The invention discloses an n-octadecane phase change micro-emulsion. The micro-emulsion comprises water and the following components in mass fraction: 5-40% of n-octadecane, 2-20% of surfactant, 0-20% of fatty alcohols and 0-3% of inorganic salts. The preparation method comprises the following steps of: firstly mixing n-octadecane, the surfactant, fatty alcohol and the inorganic salts according to the ratio of the mass fraction, then adding the remained water at 30-40 DEG C, stirring uniformly and standing to obtain the n-octadecane phase change micro-emulsion. The n-octadecane phase change micro-emulsion can be applied to a microelectronic system thermal management, and is used for micro-channel efficient heat dissipation cooling working medium in a thermal management system. The micro-emulsion and the application thereof have the advantages of high latent heat of phase change, wide applicable temperature range, good stability and the like.

Description

technical field [0001] The invention relates to a microemulsion and its preparation method and application, in particular to a phase change microemulsion and its preparation method and application. Background technique [0002] The rapid development of microelectronics technology promotes the high integration of various functional modules, the temperature of the chip continues to rise, the heat flux of the chip increases sharply, and the heat dissipation problem caused by it becomes increasingly prominent. Micro-channel heat sink is a new high-efficiency liquid cooling heat dissipation technology, which is gradually being applied in the thermal management technology of large-scale integrated circuits and high-power chips. Heat, so as to achieve cooling effect. At present, the cooling medium used for heat dissipation in microchannels is mainly water. Although water has a larger specific heat compared with general cooling fluids, its thermal conductivity and specific heat cap...

Claims

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Application Information

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IPC IPC(8): C09K5/06
Inventor 程海峰郭亚飞郑文伟张朝阳
Owner NAT UNIV OF DEFENSE TECH
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