CN110642242A - Manufacturing method of three-dimensional structure carbon nanotube and graphene composite CPU heat dissipation material - Google Patents
Manufacturing method of three-dimensional structure carbon nanotube and graphene composite CPU heat dissipation material Download PDFInfo
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- CN110642242A CN110642242A CN201911040566.6A CN201911040566A CN110642242A CN 110642242 A CN110642242 A CN 110642242A CN 201911040566 A CN201911040566 A CN 201911040566A CN 110642242 A CN110642242 A CN 110642242A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/158—Carbon nanotubes
- C01B32/168—After-treatment
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/184—Preparation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2202/00—Structure or properties of carbon nanotubes
- C01B2202/06—Multi-walled nanotubes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2202/00—Structure or properties of carbon nanotubes
- C01B2202/20—Nanotubes characterized by their properties
- C01B2202/24—Thermal properties
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2202/00—Structure or properties of carbon nanotubes
- C01B2202/20—Nanotubes characterized by their properties
- C01B2202/34—Length
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2202/00—Structure or properties of carbon nanotubes
- C01B2202/20—Nanotubes characterized by their properties
- C01B2202/36—Diameter
Abstract
The invention discloses a CPU heat dissipation material with a three-dimensional structure of carbon nanotubes and graphene and a manufacturing method thereof, the material is a compact film layer which is obtained by integrating 1.7 to 1.9 parts by weight of multi-walled carbon nanotubes with specifications of 2nm to 4nm of inner diameter, 6nm to 10nm of outer diameter and 2 mu M to 10 mu M of length by weight of 5.5 to 8 parts by weight of graphene final dispersion liquid, spraying, drying, GN/M being 30 to 35 and 1ms of irradiation time, and has a plurality of carbon nanotubes dispersed and three-dimensionally dispersed in a graphene body, the water contact angle of the film layer is 118 degrees to 123 degrees, and the heat conductivity is 4000W/m.K to 5500W/m.K. The invention does not need to replace the existing heat dissipation material, can improve the overall heat dissipation efficiency, is anti-aging and hydrophobic, and has wide application range.
Description
Technical Field
The invention relates to the technical field of heat dissipation materials for electrical devices, in particular to a manufacturing method of a three-dimensional structure carbon nanotube and graphene composite CPU heat dissipation material.
Background
The technology of the CPU heat dissipation material is certainly mature, but in the limit working condition, people are troubled by several key links:
firstly, the problem of the limit of the heat dissipation efficiency is solved, no matter how the heat dissipation structure is designed delicately, the CPU radiator is limited by the materials, and the limit efficiency of the heat dissipation is realized, so that for the CPU with top performance and higher power consumption, the CPU radiator is replaced by a complex radiator with higher price, poorer reliability and more difficult maintenance, or replaced by a high-cost heat conduction material with higher heat transfer efficiency; secondly, the heat dissipation efficiency is seriously affected by the complexity of the conventional heat dissipation structure and the adhesion of water and oily substances in the air, which is easy to absorb and accumulate dust, along with the prolonging of the service life.
Therefore, there is a need in the market for a method for manufacturing a three-dimensional structure carbon nanotube and graphene composite CPU heat dissipation material, which can improve the overall heat dissipation efficiency, is resistant to aging and hydrophobic, and has a wide application range, without replacing the existing heat dissipation material.
Disclosure of Invention
The invention aims to provide a manufacturing method of a three-dimensional structure carbon nano tube and graphene composite CPU heat dissipation material, which does not need to replace the existing heat dissipation material, can improve the overall heat dissipation efficiency, is anti-aging and hydrophobic and has a wide application range.
In order to achieve the purpose, the invention adopts the following technical scheme: a manufacturing method of a three-dimensional structure carbon nanotube and graphene composite CPU heat dissipation material comprises the following steps:
1) raw material preparation
Preparing raw materials: preparing 135-140 parts of concentrated sulfuric acid, 6-8 parts of activated carbon powder, 1.7-1.9 parts of multi-walled carbon nano-tube and 16-17 parts of potassium permanganate according to parts by weight;
2) low temperature staged reaction
Firstly, an ice bath pool consisting of an ice-water mixture is arranged;
uniformly mixing concentrated sulfuric acid, activated carbon powder, multi-walled carbon nanotubes and 800-900 parts of deionized water prepared in the step 1), putting the mixture into a glass container, immersing the container into the ice bath prepared in the step 1, keeping the solution inside and outside the container isolated, and mechanically stirring for 2.5-3 hours at a stirring speed of 30-35 rpm/min to obtain a low-temperature pre-reaction tank;
thirdly, slowly and uniformly putting the potassium permanganate prepared in the step 1) into the low-temperature pre-reaction tank obtained in the step two at an adding speed of 5 percent/min of the total weight of the potassium permanganate, and continuously stirring for 90-100 min at a stirring speed of 15-20 rpm/min after putting to obtain a low-temperature reaction solution;
taking the glass container out of the ice bath pool, and finishing the low-temperature reaction stage to obtain the glass container containing the reaction product A;
3) intermediate temperature reaction stage
Preparing a warm water bath pool consisting of warm water with the constant water temperature of 36-38 ℃;
immersing the glass container containing the reaction product A obtained in the step (2) in a warm water bath, and keeping the solution inside and outside the container isolated to obtain a medium-temperature reaction dissolving tank;
thirdly, continuously stirring the medium-temperature reaction-waiting dissolving tank obtained in the second step at a stirring speed of 120-150 rpm/min for 80-90 min to obtain medium-temperature reaction solution;
taking the glass container out of the warm water bath, and finishing the medium temperature reaction stage to obtain the glass container containing the reaction product B;
4) high temperature reaction stage
Preparing a high-temperature bath pool consisting of water with the constant water temperature of 95-97 ℃;
immersing the glass container containing the reaction product B obtained in the step (3) in a warm water bath, and keeping the solution inside and outside the container isolated to obtain a high-temperature reaction dissolving tank;
thirdly, slowly and uniformly injecting 250 to 300 parts by weight of deionized water into the high-temperature reaction-waiting dissolving tank obtained in the second step at an adding rate of 5 percent/min of the total weight of the deionized water, and then standing for reacting for 45 to 50min to obtain a high-temperature reaction solution;
taking the glass container out of the high-temperature bath pool, and finishing the high-temperature reaction stage to obtain the glass container containing the reaction product C;
5) material separation
Firstly, injecting 450 to 500 parts by weight of deionized water into a glass container containing a reaction product C again, and centrifugally washing until the pH value of the reaction product C is 6.5 to 7.5 to obtain a product dispersion liquid;
secondly, the product dispersion liquid is filled in a spraying container with a nozzle diameter of 0.2mm-0.5mm to obtain a dispersion liquid sprayer;
and thirdly, when the solar battery is to be used, uniformly and completely spraying and moistening the dispersion sprayer on the outer surface of the CPU heat dissipation structure sold in the market, and after natural drying, processing the dried dispersion by adopting flash with the irradiation intensity of GN/M (30-35) and the irradiation time of 1ms to obtain the CPU heat dissipation structure with the heat dissipation efficiency improved by the required three-dimensional structure carbon nano tube and graphene composite CPU heat dissipation material.
In the manufacturing method of the three-dimensional structure carbon nanotube and graphene composite CPU heat dissipation material, the specific specifications of the multi-wall carbon nanotube are 2nm-4nm in inner diameter, 6nm-10nm in outer diameter and 2 μm-10 μm in length.
A CPU heat dissipation material with a three-dimensional structure of carbon nanotubes and graphene is characterized in that 1.7 to 1.9 parts by weight of multi-walled carbon nanotubes with the specifications of 2nm to 4nm in inner diameter, 6nm to 10nm in outer diameter and 2 mu M to 10 mu M in length are integrated according to parts by weight, 5.5 to 8 parts by weight of graphene final dispersion liquid is sprayed, moistened and dried, GN/M is 30 to 35, and irradiation time is 1ms, so that a compact film layer with a plurality of carbon nanotubes dispersed and three-dimensionally dispersed in a graphene body is obtained, the water contact angle of the film layer is 118 degrees, and the heat conductivity is 4000W/m.K-5500W/m.K.
Compared with the prior art, the invention has the following advantages: (1) the invention develops a new method, invents a composite dispersion liquid spray, can be applied to any CPU heat dissipation device before installation and use, can be suitable no matter whether the material is copper, aluminum or other alloys, does not need to carry out special treatment, and can not generate extra cost. (2) The graphene serving as the matrix has high self heat conduction efficiency, and the short carbon nanotubes integrated in the graphene can obviously improve the heat conduction efficiency and solve the problem of too single original heat conduction direction due to the heat conduction characteristics (the axial heat conductivity of the carbon nanotubes can even be about 6000W/m.K, but the longer the carbon nanotubes are, the lower the overall heat conductivity is) and the structure of the short carbon nanotubes in which the graphene can be distributed in a disordered, three-dimensional and dispersed manner, so that the heat dissipation is more uniform. (3) After the flash treatment, the surface of the film layer can form an irregular undulating structure, so that the specific surface area of the film layer contacted with air is obviously increased, and the heat dissipation efficiency is further improved. (4) After the film layer is cured and flash-treated, the water contact angle is 118-123 degrees, the film layer has good hydrophobic property, the surface of the heat dissipation structure can be kept clean to a certain degree, and the service life and the stability of the film layer are improved. Therefore, the invention has the characteristics of no need of replacing the existing heat dissipation material, capability of improving the overall heat dissipation efficiency, ageing resistance, hydrophobicity and wide application range.
Detailed Description
Example 1:
a manufacturing method of a three-dimensional structure carbon nanotube and graphene composite CPU heat dissipation material comprises the following steps:
preparing raw materials: preparing 1350g of concentrated sulfuric acid and 80g of activated carbon powder in parts by weight, 19g of multi-walled carbon nano-tube with the specification of 2-4 nm of inner diameter, 6-10 nm of outer diameter and 2-10 mu m of length and 170g of potassium permanganate;
uniformly mixing concentrated sulfuric acid, activated carbon powder, multi-walled carbon nanotubes and 8-9 kg of deionized water, then putting the mixture into a glass container, immersing the outer surface of the container into an ice-water mixture pool, mechanically stirring the mixture for 3 hours at a stirring speed of 30-35 rpm, then slowly and uniformly putting potassium permanganate into the low-temperature pre-reaction pool obtained in the step (II) at an addition speed of 8.5g/min of the total weight of the potassium permanganate, and continuously stirring the mixture for 90-100 minutes at a stirring speed of 15-20 rpm after the putting is finished, thus obtaining a low-temperature reaction solution;
thirdly, immersing a glass container containing the low-temperature reaction solution into a warm water bath with the constant water temperature of 36-38 ℃, and continuously stirring at the stirring speed of 120-150 rpm/min for 80-90 min to obtain a medium-temperature reaction solution;
soaking a glass container containing the medium-temperature reaction solution into a high-temperature bath with the constant water temperature of 95-97 ℃, slowly and uniformly injecting 2.8kg of deionized water into the medium-temperature reaction solution at the adding rate of 140g/min of the total weight of the glass container, standing for reaction for 45-50 min to obtain the high-temperature reaction solution
Fifthly, injecting 4.8kg of deionized water into the high-temperature reaction solution again, and centrifugally washing until the pH value is 6.5-7.5 to obtain a product dispersion liquid; the product dispersion liquid is filled in a spray container with a nozzle diameter of 0.2mm-0.5mm to obtain a dispersion liquid sprayer; when the radiating structure is used, the dispersion sprayer is uniformly and completely sprayed on the outer surface of a commercially available CPU radiating structure in a covering manner, after natural drying, the dried dispersion is treated by adopting flash with the irradiation intensity of GN/M (30-35) and the irradiation time of 1ms, and the CPU radiating structure with the radiating efficiency improved by the required three-dimensional structure carbon nano tube and graphene composite CPU radiating material is obtained.
The embodiment can additionally improve the overall thermal conductivity of the original heat dissipation material from 200W/m.K to 250W/m.K on the basis of the heat dissipation efficiency of the original heat dissipation material, and the water contact angle is the same under 118-123 degrees.
Example 2:
the whole is in accordance with example 1, with the difference that:
preparing raw materials: preparing 1400g of concentrated sulfuric acid, 60g of activated carbon powder, 16g of multi-walled carbon nano-tube with the inner diameter of 6-10 nm, the outer diameter of 22-30 nm, the length of 15-50 mu m and 160g of potassium permanganate according to parts by weight;
uniformly mixing concentrated sulfuric acid, activated carbon powder, multi-walled carbon nanotubes and 8-9 kg of deionized water prepared in the step 1), putting the mixture into a glass container, immersing the outer surface of the container into an ice-water mixture tank, mechanically stirring the mixture for 2.5 hours at a stirring speed of 30-35 rpm/min, slowly and uniformly adding potassium permanganate into the low-temperature pre-reaction tank obtained in the step (II) at an addition speed of 8g/min of the total weight of the potassium permanganate, and continuously stirring the mixture for 90-100 minutes at a stirring speed of 15-20 rpm/min after the adding is finished to obtain a low-temperature reaction solution;
soaking a glass container containing the medium-temperature reaction solution into a high-temperature bath with the constant water temperature of 95-97 ℃, slowly and uniformly injecting 2.5kg of deionized water into the medium-temperature reaction solution at the adding rate of 125g/min, standing for 45-50 min to obtain the high-temperature reaction solution
Fifthly, injecting 4.5kg of deionized water into the high-temperature reaction solution again
Example 3:
the whole is in accordance with example 1, with the difference that:
soaking a glass container containing the medium-temperature reaction solution into a high-temperature bath with constant water temperature of 95-97 ℃, slowly and uniformly injecting 3kg of deionized water into the medium-temperature reaction solution at the adding rate of 150g/min, standing for 45-50 min to obtain the high-temperature reaction solution
Fifthly, 5kg of deionized water is injected into the high-temperature reaction solution again.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. A manufacturing method of a three-dimensional structure carbon nanotube and graphene composite CPU heat dissipation material is characterized by comprising the following steps:
1) raw material preparation
Preparing raw materials: preparing 135-140 parts of concentrated sulfuric acid, 6-8 parts of activated carbon powder, 1.7-1.9 parts of multi-walled carbon nano-tube and 16-17 parts of potassium permanganate according to parts by weight;
2) low temperature staged reaction
Firstly, an ice bath pool consisting of an ice-water mixture is arranged;
uniformly mixing concentrated sulfuric acid, activated carbon powder, multi-walled carbon nanotubes and 800-900 parts of deionized water prepared in the step 1), putting the mixture into a glass container, immersing the container into the ice bath prepared in the step 1, keeping the solution inside and outside the container isolated, and mechanically stirring for 2.5-3 hours at a stirring speed of 30-35 rpm/min to obtain a low-temperature pre-reaction tank;
thirdly, slowly and uniformly putting the potassium permanganate prepared in the step 1) into the low-temperature pre-reaction tank obtained in the step two at an adding speed of 5 percent/min of the total weight of the potassium permanganate, and continuously stirring for 90-100 min at a stirring speed of 15-20 rpm/min after putting to obtain a low-temperature reaction solution;
taking the glass container out of the ice bath pool, and finishing the low-temperature reaction stage to obtain the glass container containing the reaction product A;
3) intermediate temperature reaction stage
Preparing a warm water bath pool consisting of warm water with the constant water temperature of 36-38 ℃;
immersing the glass container containing the reaction product A obtained in the step (2) in a warm water bath, and keeping the solution inside and outside the container isolated to obtain a medium-temperature reaction dissolving tank;
thirdly, continuously stirring the medium-temperature reaction-waiting dissolving tank obtained in the second step at a stirring speed of 120-150 rpm/min for 80-90 min to obtain medium-temperature reaction solution;
taking the glass container out of the warm water bath, and finishing the medium temperature reaction stage to obtain the glass container containing the reaction product B;
4) high temperature reaction stage
Preparing a high-temperature bath pool consisting of water with the constant water temperature of 95-97 ℃;
immersing the glass container containing the reaction product B obtained in the step (3) in a warm water bath, and keeping the solution inside and outside the container isolated to obtain a high-temperature reaction dissolving tank;
thirdly, slowly and uniformly injecting 250 to 300 parts by weight of deionized water into the high-temperature reaction-waiting dissolving tank obtained in the second step at an adding rate of 5 percent/min of the total weight of the deionized water, and then standing for reacting for 45 to 50min to obtain a high-temperature reaction solution;
taking the glass container out of the high-temperature bath pool, and finishing the high-temperature reaction stage to obtain the glass container containing the reaction product C;
5) material separation
Firstly, injecting 450 to 500 parts by weight of deionized water into a glass container containing a reaction product C again, and centrifugally washing until the pH value of the reaction product C is 6.5 to 7.5 to obtain a product dispersion liquid;
secondly, the product dispersion liquid is filled in a spraying container with a nozzle diameter of 0.2mm-0.5mm to obtain a dispersion liquid sprayer;
and thirdly, when the solar battery is to be used, uniformly and completely spraying and moistening the dispersion sprayer on the outer surface of the CPU heat dissipation structure sold in the market, and after natural drying, processing the dried dispersion by adopting flash with the irradiation intensity of GN/M (30-35) and the irradiation time of 1ms to obtain the CPU heat dissipation structure with the heat dissipation efficiency improved by the required three-dimensional structure carbon nano tube and graphene composite CPU heat dissipation material.
2. The method for manufacturing the heat dissipation material of the CPU with the three-dimensional structure of the carbon nanotube and the graphene as claimed in claim 1, wherein the method comprises the following steps: the specific specifications of the multi-wall carbon nano tube are 2nm-4nm of inner diameter, 6nm-10nm of outer diameter and 2μm-10μm of length.
3. The utility model provides a spatial structure carbon nanotube and graphite alkene compound CPU heat dissipation material which characterized in that: the material is a compact film layer which is obtained by integrating 1.7 to 1.9 parts of multi-walled carbon nanotubes with the specifications of 2 to 4nm of inner diameter, 6 to 10nm of outer diameter and 2 to 10 mu M of length by weight and 5.5 to 8 parts of graphene final dispersion liquid by total weight, spraying, drying, GN/M being 30 to 35 and irradiating for 1ms, wherein a plurality of carbon nanotubes are dispersed and three-dimensionally dispersed in a graphene body, the water contact angle of the film layer is 118 to 123 degrees, and the thermal conductivity is 4000W/m.K to 5500W/m.K.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911040566.6A CN110642242A (en) | 2019-10-29 | 2019-10-29 | Manufacturing method of three-dimensional structure carbon nanotube and graphene composite CPU heat dissipation material |
| PCT/CN2019/114514 WO2021081856A1 (en) | 2019-10-29 | 2019-10-31 | Manufacturing method for three-dimensional structure carbon nanotube and graphene composite cpu heat dissipation material |
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| CN201911040566.6A CN110642242A (en) | 2019-10-29 | 2019-10-29 | Manufacturing method of three-dimensional structure carbon nanotube and graphene composite CPU heat dissipation material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9835390B2 (en) * | 2013-01-07 | 2017-12-05 | Nanotek Instruments, Inc. | Unitary graphene material-based integrated finned heat sink |
| CN103725263A (en) * | 2013-12-17 | 2014-04-16 | 张家港康得新光电材料有限公司 | Film made from graphene-carbon nanotube composite material and preparation method of film |
| CN106861617B (en) * | 2017-01-25 | 2019-08-02 | 河北大学 | A kind of preparation method and applications of Graphene/carbon nanotube composite material |
| CN107151447A (en) * | 2017-07-13 | 2017-09-12 | 合肥利元杰信息科技有限公司 | A kind of CPU high-efficiency heat conduction materials and preparation method thereof |
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- 2019-10-31 WO PCT/CN2019/114514 patent/WO2021081856A1/en active Application Filing
Non-Patent Citations (2)
| Title |
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| YANGUANG LI等: "An oxygen reduction electrocatalyst based on carbon nanotube–graphene complexes", 《NATURE NANOTECHNOLOGY》 * |
| 张明龙等: "《美国纳米技术创新进展》", 30 June 2014, 《知识产权出版社》 * |
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