CN1908110A - Heat-conducting fluid and preparation method thereof - Google Patents
Heat-conducting fluid and preparation method thereof Download PDFInfo
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- CN1908110A CN1908110A CN 200510036441 CN200510036441A CN1908110A CN 1908110 A CN1908110 A CN 1908110A CN 200510036441 CN200510036441 CN 200510036441 CN 200510036441 A CN200510036441 A CN 200510036441A CN 1908110 A CN1908110 A CN 1908110A
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Abstract
The invention discloses a preparing method of conductive fluid, which comprises the following steps: reacting metal ionic solution, reduction and protective; diluting the solution; obtaining the conductive fluid. The conductive fluid consists of fluid and protective, wherein the fluid contains multiple nanometer particles, which are dispersed in the fluid; the protective is dispersed in the fluid.
Description
[technical field]
The present invention relates to hot biography field, relate in particular to a kind of heat-conducting fluid and preparation method thereof.
[background technology]
Electronic technology develops rapidly in recent years, the high frequency of electron device, high speed and unicircuit intensive and microminiaturized, make unit volume electron device thermal value increase severely, characteristics such as hot pipe technique is efficient with it, compactness and flexibility and reliability are fit to solve present electron device because of performance boost institute deutero-heat dissipation problem.
Heat pipe is normally worked effectively, requires the wick capillary structure that working fluid is evenly distributed in the heat pipe usually, and working fluid is refluxed rapidly, and require working fluid vaporization heat height, thermal conductivity big.The working fluid thermal conductivity big and in capillary wick uniform distribution, help working fluid and take away heat rapidly, electronic device temperature is reduced.
Conventional art generally adopts neat liquid as working fluid, though a lot of neat liquids have lower boiling and high decalescence amount, but thermal conductivity own is not high, can cause between thermotube wall and the working fluid and the working fluid internal thermal resistance increases and the working fluid thermal conductivity is low, thereby cause efficiency of heat pipes to descend, also can cause heat pipe evaporator section to produce local superheating simultaneously.Therefore, if can improve the thermal conductivity of working fluid, reduce between thermotube wall and the working fluid and the working fluid internal thermal resistance, then can promote the efficient of heat pipe.
Prior art provides a kind of heat-conducting fluid; this heat-conducting fluid is a suspension; it comprises a fluid and the high thermal conduc tivity ceramics powder that is suspended in this fluid; but this particles of powder size that traditional physics preparation method is obtained is all more than micron order; though can increase the heat transfer efficiency of heat-conducting fluid; yet bigger particle can cause heat pipe to block and the ability of losing the job.And described powder is Yin Fandehuali and condensing very easily, also can cause heat tube capillary structure to block and the ability of losing the job, for avoiding it to condense, usually adopt the adding tensio-active agent to disperse, stablize particles of powder, hinder heat yet tensio-active agent easily produces bubble when heat pipe is worked and pass.
In view of this, provide a kind of heat-conducting fluid and preparation method thereof real for necessary with high thermal conductivity.
[summary of the invention]
Below will a kind of preparation method with heat-conducting fluid of high thermal conductivity be described with embodiment.
And, a kind of heat-conducting fluid with high thermal conductivity.
For realizing foregoing, a kind of preparation method of heat-conducting fluid is provided, it may further comprise the steps:
Stoichiometric metal ion solution and reductive agent are provided, and adequate protective agent;
Described metal ion solution, reductive agent and protective material are mixed the back chemical reaction takes place;
Dilute above-mentioned reacted solution, obtain a kind of heat-conducting fluid.
Described metal ion solution comprises tetra chlorauric acid, Silver Nitrate, cross one or more the mixing in silver chlorate, copper sulfate, silver chloride and the cupric nitrate.
Described reductive agent is one or more the mixing in sodium borohydride, sodium hypophosphite, diammonium, tin protochloride, hydrochloric acid hydrogen amine, Trisodium Citrate and the ethylene glycol.
Described protective material comprises one or more mixing of citric acid, Citrate trianion, single lemon acid, polyvinyl alcohol, Polyvinylpyrolidone (PVP) and quarternary ammonium salt.
Described protectant consumption is metal-salt or metal acid gross weight 0.05～2 times in the metal ion solution.
Described when metal ion solution and reductive agent reaction, described metal ion solution is carried out heated and stirred.
Described when metal ion solution and reductive agent reaction, described metal ion solution is carried out ultrasonic oscillation.
The mixing of one or more of described dilution step employing water, alcohols and ketone.
Described alcohols is one or more the mixing in methyl alcohol, ethanol, propyl alcohol, propyl carbinol, Pentyl alcohol, n-hexyl alcohol, n-Heptyl alcohol, n-Octanol and the ethylene glycol.
Described ketone is an acetone.
And, a kind of heat-conducting fluid is provided, it comprises:
One fluid;
A plurality of nanoparticles, it is dispersed in the described fluid;
One protective material is dispersed in the described fluid,
Wherein said nanoparticle accounts for 0.1%～3% of heat-conducting fluid gross weight.
Described fluid comprises one or more mixing of water, alcohols and ketone.
Described alcohols is one or more the mixing in methyl alcohol, ethanol, propyl alcohol, propyl carbinol, Pentyl alcohol, n-hexyl alcohol, n-Heptyl alcohol, n-Octanol and the ethylene glycol.
Described ketone is an acetone.
Described nanoparticle is selected from following material: the mixing of one or more in gold and silver, copper, aluminium, cupric oxide, aluminum oxide, boron nitride, aluminium nitride and the zinc oxide.
Described protective material comprises one or more mixing of citric acid, Citrate trianion, single lemon acid and quarternary ammonium salt.
The particle diameter of described nanoparticle is 1～100 nanometer.
The preparation method of the heat-conducting fluid that present embodiment provides; metal ion solution and reductive agent are reacted; thereby can control the size of the particle of reaction generation, make it reach nanometer scale, to obtain to have the finely disseminated heat-conducting fluid of nanoparticle.The heat-conducting fluid that present embodiment provides; be dispersed with nanoparticle and protective material in it; because nano particle diameter is very little; and owing to there is protective material to exist in the heat-conducting fluid; can prevent nanoparticle agglomeration; thereby can avoid heat pipe to stop up, and described nanoparticle can reduce the thermal resistance of thermotube wall and heat-conducting fluid and heat-conducting fluid inside, thereby improve the hot transfer efficiency of heat pipe.
[description of drawings]
Fig. 1 is preparation method's schematic flow sheet of the heat-conducting fluid of the technical program.
[embodiment]
Below in conjunction with accompanying drawing the technical program is described in further detail.
See also Fig. 1, the preparation method of the heat-conducting fluid that present embodiment provides, it may further comprise the steps: stoichiometric metal ion solution and reductive agent are provided, and adequate protective agent; Described metal ion solution, reductive agent and protective material are mixed the back chemical reaction takes place; Dilute above-mentioned reacted solution, obtain a kind of heat-conducting fluid.The manufacture method of the heat-conducting fluid that in conjunction with the embodiments the technical program is provided again elaborates below.
Step 100: stoichiometric metal ion solution and reductive agent are provided, and adequate protective agent.Wherein said metal ion solution comprises tetra chlorauric acid, Silver Nitrate, cross one or more the mixing in silver chlorate, copper sulfate, silver chloride and the cupric nitrate etc., and described reductive agent is one or more the mixing in sodium borohydride, sodium hypophosphite, diammonium, tin protochloride, hydrochloric acid hydrogen amine, Trisodium Citrate and the ethylene glycol etc.Described protective material comprises one or more mixing of citric acid, Citrate trianion, single lemon acid, polyvinyl alcohol, Polyvinylpyrolidone (PVP) and quarternary ammonium salt, and preferably, described Citrate trianion is one or more mixing of Trisodium Citrate or Tripotassium Citrate.Wherein can reach the size that the metallics of back generation is reacted in control by concentration and protectant consumption of control metal ion solution.Usually, under the constant situation of other condition, metal ion solution concentration is low more, and the metallics particle that obtains is thin more, and metal ion solution concentration is big more, and the metallics particle that obtains is big more.And metallics granular size and protectant consumption are just in time opposite, and the protective material consumption is big more, and the metallics particle that obtains is thin more, and the protective material consumption is more little, and the metallics particle that obtains is big more.Preferably, the metal ion solution total concn is less than 1.5mol/L, and protectant consumption is metal-salt or metal acid gross weight 0.05～2 times in the metal ion solution.The metal ion solution that present embodiment uses is silver nitrate solution, and reductive agent is a sodium hypophosphite, and protective material is a polyvinyl alcohol.Wherein silver nitrate solution concentration is 0.2mol/L, and protectant weight is 0.5 times of Silver Nitrate weight.
Step 200: described metal ion solution, reductive agent and protective material are mixed the back chemical reaction takes place.Wherein said metal ion solution, reductive agent and protective material mix, and can earlier metal ion solution and protective material be mixed, and mix with reductive agent again, also can earlier reductive agent and protective material be mixed, and mix with metal ion solution again.Described metal ion solution and the reductive agent of making reacts when protective material exists; be owing to regulate the speed that protectant consumption can be regulated and control reduction reaction; in a single day the metallics nucleus that generates when reduction reaction forms; just be under protectant protection; grow up into the particulate of homogeneous then, thereby make the metallics particle size distribution range very narrow.And, can make metallics in solution, form the suspension of homogeneous, and prevent the metallics reunion by high molecular dissemination.In described metal ion solution and the reductive agent reaction process, can carry out heated and stirred or carry out ultrasonic oscillation, preferably, described metal ion solution be carried out heated and stirred and ultrasonic oscillation simultaneously described metal ion solution.
Step 300: dilute above-mentioned reacted solution, obtain a kind of heat-conducting fluid.According to heat-conducting fluid the requirement of nanoparticle content is suitably diluted step 200 reacted solution.Described dilution step can make one or more mixing of water, alcohols and ketone, preferably, described alcohols is one or more the mixing in methyl alcohol, ethanol, propyl alcohol, propyl carbinol, Pentyl alcohol, n-hexyl alcohol, n-Heptyl alcohol, n-Octanol and the ethylene glycol, and described ketone is an acetone.In the present embodiment, water is diluted to reacted solution, nanoparticle accounts for 0.5% of heat-conducting fluid gross weight in the heat-conducting fluid that obtains after dilution.
The heat-conducting fluid that present embodiment provides, it comprises: a fluid; A plurality of nanoparticles, it is dispersed in the described fluid; One protective material; be dispersed in the described fluid; described nanoparticle accounts for 0.1%～3% of heat-conducting fluid gross weight; described protective material comprises one or more mixing of citric acid, Citrate trianion, single lemon acid, polyvinyl alcohol, Polyvinylpyrolidone (PVP) and quarternary ammonium salt, and described Citrate trianion is one or more mixing of Trisodium Citrate or Tripotassium Citrate.Described fluid comprises one or more mixing of water, alcohols and ketone, preferably, described alcohols is one or more the mixing in methyl alcohol, ethanol, propyl alcohol, propyl carbinol, Pentyl alcohol, n-hexyl alcohol, n-Heptyl alcohol, n-Octanol and the ethylene glycol, and described ketone is an acetone.Described nanometer particle material is selected from one or more the mixing in gold and silver, copper, aluminium, cupric oxide, aluminum oxide, boron nitride, aluminium nitride and the zinc oxide.Described nano particle diameter is 1～100 nanometer.
The preparation method of the heat-conducting fluid that present embodiment provides; metal ion solution and reductive agent are reacted; thereby can control the size of the particle of reaction generation, make to reach nanometer scale, to obtain to have the heat-conducting fluid of nanoparticle.The heat-conducting fluid that present embodiment provides; be dispersed with nanoparticle and protective material in it; because nano particle diameter is very little; and owing to there is protective material to exist in the heat-conducting fluid; can prevent nanoparticle agglomeration; thereby can avoid heat pipe to stop up, and described nanoparticle can reduce the thermal resistance of thermotube wall and heat-conducting fluid and heat-conducting fluid inside, thereby improve the hot transfer efficiency of heat pipe.
Be understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion, and all these changes and distortion all should belong to the protection domain of claim of the present invention according to technical scheme of the present invention and technical conceive.
Claims (17)
1. the preparation method of a heat-conducting fluid, it may further comprise the steps: stoichiometric metal ion solution and reductive agent are provided, and adequate protective agent; Described metal ion solution, reductive agent and protective material are mixed the back chemical reaction takes place; Dilute above-mentioned reacted solution, obtain a kind of heat-conducting fluid.
2. the preparation method of heat-conducting fluid according to claim 1 is characterized in that, described metal ion solution comprises tetra chlorauric acid, Silver Nitrate, cross one or more the mixing in silver chlorate, copper sulfate, silver chloride and the cupric nitrate.
3. the preparation method of heat-conducting fluid according to claim 1 is characterized in that, described reductive agent is one or more the mixing in sodium borohydride, sodium hypophosphite, diammonium, tin protochloride, hydrochloric acid hydrogen amine, Trisodium Citrate and the ethylene glycol.
4. the preparation method of heat-conducting fluid according to claim 1 is characterized in that, described protective material comprises one or more mixing of citric acid, Citrate trianion, single lemon acid, polyvinyl alcohol, Polyvinylpyrolidone (PVP) and quarternary ammonium salt.
5. the preparation method of heat-conducting fluid according to claim 1 is characterized in that, described protectant consumption is metal-salt or metal acid gross weight 0.05～2 times in the metal ion solution.
6. the preparation method of heat-conducting fluid according to claim 1 is characterized in that, and is described when metal ion solution and reductive agent reaction, and described metal ion solution is carried out heated and stirred.
7. the preparation method of heat-conducting fluid according to claim 1 is characterized in that, and is described when metal ion solution and reductive agent reaction, and described metal ion solution is carried out ultrasonic oscillation.
8. the preparation method of heat-conducting fluid according to claim 1 is characterized in that, described dilution step utilizes one or more mixing solutions of water, alcohols and ketone to dilute.
9. the preparation method of heat-conducting fluid according to claim 1 is characterized in that, described alcohols is one or more the mixing in methyl alcohol, ethanol, propyl alcohol, propyl carbinol, Pentyl alcohol, n-hexyl alcohol, n-Heptyl alcohol, n-Octanol and the ethylene glycol.
10. as the preparation method of heat-conducting fluid as described in 1 of the claim the, it is characterized in that described ketone is an acetone.
11. a heat-conducting fluid, it comprises: a fluid; A plurality of nanoparticles, it is dispersed in the described fluid; And a protective material, being dispersed in the described fluid, wherein said nanoparticle accounts for 0.1%～3% of heat-conducting fluid gross weight.
12., it is characterized in that described fluid comprises one or more mixing of water, alcohols and ketone as heat-conducting fluid as described in 12 of the claims the.
13., it is characterized in that described alcohols is one or more the mixing in methyl alcohol, ethanol, propyl alcohol, propyl carbinol, Pentyl alcohol, n-hexyl alcohol, n-Heptyl alcohol, n-Octanol and the ethylene glycol as heat-conducting fluid as described in 13 of the claims the.
14., it is characterized in that described ketone is an acetone as heat-conducting fluid as described in 13 of the claims the.
15., it is characterized in that described nanoparticle is selected from following material: the mixing of one or more in gold and silver, copper, aluminium, cupric oxide, aluminum oxide, boron nitride, aluminium nitride and the zinc oxide as heat-conducting fluid as described in 12 of the claims the.
16., it is characterized in that described protective material comprises one or more mixing of citric acid, Citrate trianion, single lemon acid, polyvinyl alcohol, Polyvinylpyrolidone (PVP) and quarternary ammonium salt as heat-conducting fluid as described in 12 of the claims the.
17., it is characterized in that the particle diameter of described nanoparticle is 1～100 nanometer as heat-conducting fluid as described in 12 of the claims the.
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| CN 200510036441 CN1908110A (en) | 2005-08-05 | 2005-08-05 | Heat-conducting fluid and preparation method thereof |
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| CN 200510036441 CN1908110A (en) | 2005-08-05 | 2005-08-05 | Heat-conducting fluid and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792658B (en) * | 2010-01-19 | 2013-01-30 | 上海建工（集团）总公司 | Thermal conducting water-stop slurry material and preparation and application thereof |
| CN103509522A (en) * | 2013-09-28 | 2014-01-15 | 昆山市周市溴化锂溶液厂 | Lithium bromide absorption liquid with nano-silver disperse system and preparation method thereof |
| CN103555277A (en) * | 2013-09-28 | 2014-02-05 | 昆山市周市溴化锂溶液厂 | Lithium bromide absorption liquid with nanogold dispersion system and preparation method thereof |
| CN108893097A (en) * | 2018-07-24 | 2018-11-27 | 郑州阿弗雷德化工科技有限公司 | For cooling down the nano silver fluid and its synthetic method of working medium |
| CN110184036A (en) * | 2019-03-30 | 2019-08-30 | 华南理工大学 | Micro-nano structure heat transfer can be strengthened moistens nano-fluid and preparation method and application certainly |
-
2005
- 2005-08-05 CN CN 200510036441 patent/CN1908110A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792658B (en) * | 2010-01-19 | 2013-01-30 | 上海建工（集团）总公司 | Thermal conducting water-stop slurry material and preparation and application thereof |
| CN103509522A (en) * | 2013-09-28 | 2014-01-15 | 昆山市周市溴化锂溶液厂 | Lithium bromide absorption liquid with nano-silver disperse system and preparation method thereof |
| CN103555277A (en) * | 2013-09-28 | 2014-02-05 | 昆山市周市溴化锂溶液厂 | Lithium bromide absorption liquid with nanogold dispersion system and preparation method thereof |
| CN108893097A (en) * | 2018-07-24 | 2018-11-27 | 郑州阿弗雷德化工科技有限公司 | For cooling down the nano silver fluid and its synthetic method of working medium |
| CN110184036A (en) * | 2019-03-30 | 2019-08-30 | 华南理工大学 | Micro-nano structure heat transfer can be strengthened moistens nano-fluid and preparation method and application certainly |
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