CN110225691A - A kind of production method for strengthening the carbon-based composite membrane that radiates - Google Patents
A kind of production method for strengthening the carbon-based composite membrane that radiates Download PDFInfo
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- CN110225691A CN110225691A CN201910486176.5A CN201910486176A CN110225691A CN 110225691 A CN110225691 A CN 110225691A CN 201910486176 A CN201910486176 A CN 201910486176A CN 110225691 A CN110225691 A CN 110225691A
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- carbon
- composite membrane
- based composite
- graphite film
- precursor solution
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
Abstract
The invention discloses a kind of production method for strengthening the carbon-based composite membrane that radiates, specific steps are as follows: prepare polyvinylidene fluoride-hexafluoropropene precursor solution；Graphite film is fixed on plate；Above-mentioned precursor solution is coated on graphite film.Carbon-based composite membrane prepared by the present invention is applicable to the heat dissipation of system and equipment, the heat dissipation of heat dissipation technology, outdoor electronic device especially suitable for spacecraft；The polyvinylidene fluoride coated in the present invention-hexafluoropropene precursor solution is relatively easy in conjunction with graphite film, and does not influence respective performance.
Description
Technical field
The present invention relates to a kind of production methods for strengthening the carbon-based composite membrane that radiates, and belong to technical field of function materials.
Background technique
With the development of society, the work of people more and more depends on electronic equipment.Presently, there are many open airs
Electronic equipment, they increase the temperature of electronic equipment due to influence itself that generate heat by sun heat radiation and equipment,
And temperature is excessively high that electronic equipment can be caused to fail, therefore eliminates both heat sources and influence to the normal work of electronic equipment to Guan Chong
It wants.Existing cooling means has air-conditioning, forced ventilation and air heat exchange etc..But the economy and reliability of the above method have
It is to be hoisted.The cooling type of cooling novel as one kind of radiation is resolved the above problem.Polyvinylidene fluoride-hexafluoro
Acrylic coating (coating A) has good radiation cooling performance, and coating A can be covered on to the surface of electronic equipment, pass through coating A
Passive cooling reduce the influence of sun heat radiation, and then realize the cooling of electronic equipment.But since the face of coating A is thermally conductive
Performance is bad, and the heat source on electronic device is mostly heat point source, so must enable heat point source to make heat source be scattered and disappeared as early as possible
Diffuse quickly into entire plane.
Summary of the invention
The object of the present invention is to provide a kind of production methods for strengthening the carbon-based composite membrane that radiates, which has excellent
Good heat dissipation performance.
Realizing the object of the invention technical solution is: a kind of production method for strengthening the carbon-based composite membrane that radiates, specific steps are as follows:
S1 prepares polyvinylidene fluoride-hexafluoropropene precursor solution；
Graphite film is fixed on plate by S2；
Above-mentioned precursor solution is coated on graphite film by S3.
Further, in S1, polyvinylidene fluoride-hexafluoropropene precursor solution is by polyvinylidene fluoride-hexafluoropropene
As raw material, acetone is as solvent, and for deionized water as non-solvent, it is molten that 1:8:1 in mass ratio is formulated the presoma
Liquid.
Further, in S2, the graphite film by thickness not less than 15 μm is fixed on plate.
Further, in S3, the precursor solution is coated on graphite film by adjusting scraper.
Further, in S3,280 μm ~ 350 μm of coating thickness.
Compared with prior art, the invention has the benefit that
1. carbon-based composite membrane prepared by the present invention is applicable to the heat dissipation of system and equipment, the heat dissipation especially suitable for spacecraft
The heat dissipation of technology, outdoor electronic device.
2. the present invention is relative to existing coating A, heat dissipation performance is more preferably.
3. the required drug of the present invention is easy to get, manufacture craft is simple, and Production Time is relatively short, it can be achieved that big rule
The production of mould has very big practical application value.
Hold 4. the polyvinylidene fluoride coated in the present invention-hexafluoropropene precursor solution is opposite in conjunction with graphite film
Easily, and not respective performance is influenced.
Detailed description of the invention
Fig. 1 is that the present invention strengthens the carbon-based composite membrane preparation method flow chart that radiates.
Fig. 2 is picture of the coating A after scanning electron microscope observation involved in the prior art.
Fig. 3 is the temperature profile of carbon-based composite membrane described in coating A and the embodiment of the present invention 1 involved in the prior art
Picture, a are the line temperature distributed images for crossing the center of circle of coating A original state, and b is the line temperature distributed image of coating A stable state, and c is
The line temperature distributed image of carbon-based composite membrane original state, d are the line temperature images of carbon-based composite membrane stable state.
Fig. 4 a is reflectance map of the carbon-based composite membrane in sun wave band (0.3-2.5 μm) of 1-2 of embodiment of the present invention preparation
Picture, Fig. 4 b are albedo image of the carbon-based composite membrane in long-wavelength infrared wave band (2.5-25 μm) of the preparation of the embodiment of the present invention 1.
Fig. 5 is the pictorial diagram for the radiant coolers that the embodiment of the present invention 1 makes.
Fig. 6 is the distribution schematic diagram of thermocouple in radiant coolers.
Fig. 7 a is the temperature change of the carbon-based composite film surface that in 10:30-16:00 prepared by embodiment 1 and its heat source, figure
7b is the temperature change of the carbon-based composite film surface that at night (0:00-6:00) prepared by embodiment 1 and its heat source.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Using polyvinylidene fluoride-hexafluoropropene (drug B) as raw material, grade acetone is analyzed as solvent, by deionized water
As non-solvent.Then drug B, acetone and water 1:8:1 in mass ratio are configured to solution.Specific method is by a certain amount of medicine
Product B is poured into the acetone got ready in advance, is 40 DEG C in bath temperature by DF-101S heat collecting type constant-temperature heating magnetic stirring apparatus
Under conditions of be stirred, until the particle of medicine B is completely dissolved.Then load weighted deionized water is added thereto and continues to stir
It mixes, until white precipitate is completely dissolved.It will be fixed on plate with a thickness of the graphite film of 25um with adhesive tape, it is then that gained is molten
Liquid is coated on the graphite film fixed by adjusting scraper, and after acetone and water evaporating completely, different-thickness can be obtained
Carbon-based composite membrane.Its preparation flow is as shown in Figure 1.
Embodiment 1
1. requiring the mass ratio of three are as follows: drug B: acetone: deionized water=1:8:1.So respectively weigh 6.25 grams of drug B,
50 grams of acetone and 6.25 grams of deionized waters.
2. weighed drug B particle is poured into the beaker for filling acetone, heat collecting type heated at constant temperature magnetic agitation is set
The bath temperature of device is 40 DEG C, is stirred 20 minutes, until particle is completely dissolved.
3. weighed deionized water is added in the solution in step 2, identical bath temperature, continue 20 points of stirring
Clock obtains precursor solution until white precipitate is completely dissolved.
4. the graphite film of 25um thickness is fixed on plate with adhesive tape, the purpose is to prevent when solution evaporates
Graphite film, which is taken up, to be come, and so as to cause fold, is coated using adjusting scraper, the height for controlling adjusting scraper is
1500um.Then the carbon-based composite membrane of 280um thickness can be obtained after acetone and deionized water evaporation to its natural air drying.
Embodiment 2
1. requiring the mass ratio of three are as follows: drug B: acetone: deionized water=1:8:1.So respectively weigh 6.25 grams of drug B,
50 grams of acetone and 6.25 grams of deionized waters.
2. the particle of weighed drug B is poured into the beaker for filling acetone, setting heat collecting type heated at constant temperature magnetic force is stirred
The bath temperature for mixing device is 40 DEG C, is stirred 20 minutes, until particle is completely dissolved.
3. weighed deionized water is added in the solution in step 2, identical bath temperature, continue 20 points of stirring
Clock obtains precursor solution until white precipitate is completely dissolved.
4. the graphite film of 25um thickness is fixed on plate with adhesive tape, the purpose is to prevent when solution evaporates
Graphite film, which is taken up, to be come, and so as to cause fold, is coated using adjusting scraper, the height for controlling adjusting scraper is
2000um.Then the carbon-based composite membrane of 350um thickness can be obtained after acetone and deionized water evaporation to its natural air drying.
Fig. 2 gives the SEM figure of coating A, it can be found that its surface is made of micropore not of uniform size, these micropores can have
The simultaneously enhanced rad of the scattering sunlight of effect.
Fig. 3 gives the line temperature distributed image of the carbon-based composite membrane of coating A and the preparation of embodiment 1, wherein the temperature of heat point source
Degree is 50 DEG C.Test uses diameter to be connected to heat point source for the copper post of 5cm and additional power source, by coating A and carbon-based composite membrane
It is cut into the circle that diameter is 34cm, heat point source is placed in its center point, coating A and carbon-based multiple is observed by thermal infrared imager
Close the profiling temperatures of film surface.It can be seen that after the sufficiently long time from picture, the peripheral temperature of coating A is still
It is lower, and the overall surface temperature distribution uniform of carbon-based composite membrane.So the face heating conduction of coating A is very poor, and it is of the invention
In carbon-based composite membrane face heating conduction it is preferable, heat point source can be made to be distributed to entire plane faster, and then radiate.By
This is as it can be seen that carbon-based composite membrane further improves the face heating conduction of coating A.
Fig. 4 a gives albedo image of the carbon-based composite membrane in sun wave band (0.3-2.5 μm) of embodiment 1-2 preparation,
It can be found that carbon-based composite membrane is thicker at sun wave band (0.3-2.5 μm), corresponding reflectivity is higher；Fig. 4 b gives implementation
The albedo image of carbon-based composite membrane prepared by example 1 in long infrared band (2.5-25 μm), it is found that in " atmospheric window " wave
Section (8-13 μm), carbon-based composite membrane have lower reflectivity, and since the transmissivity of the composite membrane is extremely low, so carbon-based compound
Film is in " atmospheric window " wave band emissivity with higher.The above property ensure that carbon-based composite membrane has preferable radiation cooling
Performance.
In order to study the cooling performance of carbon-based composite membrane, a simple radiant coolers have been made.Fig. 5 is radiation cooling
The pictorial diagram of device.
Fig. 6 is the specific distribution of thermocouple.In Fig. 6,1 is foam pedestal, and 2 be masking foil, and 3 be polyimide heater film, 4
Be area be 82mm × 45mm, with a thickness of 280 μm of carbon-based compound membrane coats.First thermocouple 5 is used to measure without carbon-based compound
The temperature of heat source when film covers, the second thermocouple 6 is used to measure the temperature of the heat source under carbon-based composite membrane covering, i.e., carbon-based multiple
The temperature of film lower surface is closed, third thermocouple 7 is used to measure the temperature of carbon-based composite membrane upper surface (contacting with external environment), dress
It sets contact of the middle thermocouple with film to be bonded using glue resistant to high temperature, to reduce influence of the cross-ventilation to thermometric.Experiment is adopted
With K-type thermocouple, foam pedestal play the role of it is heat-insulated, masking foil be in order to by solar light focusing to surveyed film surface and reduction
Cross-ventilated influence, polyimide heater film and additional power source are connected to heat source, in experiment adjustment external power supply be 2W into
And controlling heating film surface temperature is 50 DEG C.In fine day, by the radiant coolers be placed on roof (118 ° 51 ' 14 of east longitude ", north latitude
32 ° 1 ' 37 "), the temperature change of respective surfaces is observed by thermocouple.
Fig. 7 a be with above-mentioned radiant coolers 10:30-16:00 measure with a thickness of 280 μm, size be 82mm ×
The film surface of the carbon-based composite membrane of 45mm and the below temperature change of heat source.By irradiatometer measure 13:00-13:30 this
In one period, the intensity of illumination of sunlight is 650W/m2, and heat source temperature reduces 10 DEG C or so at this time, it can be deduced that carbon
Group compound film has good heat dissipation performance.Fig. 7 b is carbon-based composite membrane its surface and temperature change of heat source below at night
Change, it can be found that in night carbon-based composite membrane but also heat source temperature reduces 2 DEG C or so, it is seen that carbon-based composite membrane is at night
With certain heat dissipation performance.
Claims (5)
1. a kind of production method for strengthening the carbon-based composite membrane that radiates, which is characterized in that specific steps are as follows:
S1 prepares polyvinylidene fluoride-hexafluoropropene precursor solution；
Graphite film is fixed on plate by S2；
Above-mentioned precursor solution is coated on graphite film by S3.
2. the method as described in claim 1, which is characterized in that in S1, polyvinylidene fluoride-hexafluoropropene precursor solution by
Polyvinylidene fluoride-hexafluoropropene is matched as solvent, deionized water as non-solvent, in mass ratio 1:8:1 as raw material, acetone
It makes.
3. the method as described in claim 1, which is characterized in that in S2, the graphite film by thickness not less than 15 μm is fixed on
On plate.
4. the method as described in claim 1, which is characterized in that in S3, the precursor solution is coated by adjusting scraper
On graphite film.
5. the method as described in claim 1, which is characterized in that in S3,280 μm ~ 350 μm of coating thickness.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110769102A (en) * | 2019-11-15 | 2020-02-07 | Oppo广东移动通信有限公司 | Double-layer film structure, shell assembly and electronic device |
| CN110868823A (en) * | 2019-11-15 | 2020-03-06 | Oppo广东移动通信有限公司 | Housing assembly and electronic device |
| CN112770610A (en) * | 2021-01-15 | 2021-05-07 | 上海闻泰信息技术有限公司 | Preparation method of graphene heat dissipation film and graphene heat dissipation film |
| CN114436660A (en) * | 2022-02-22 | 2022-05-06 | 合肥工业大学 | Preparation method of carbon nano tube-ceramic composite membrane |
| CN114672205A (en) * | 2020-12-24 | 2022-06-28 | 香港城市大学 | Radiation-cooled coating and surface coating method |
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| CN1441507A (en) * | 2002-12-26 | 2003-09-10 | 潍坊青鸟华光电池有限公司 | Prepn of polyvinylidene difluoride film for secondary lithium ion battery |
| CN101557016A (en) * | 2008-04-09 | 2009-10-14 | 深圳市鸿德电池有限公司 | Process for preparing polymer lithium ion battery and product thereby |
| CN106159009A (en) * | 2015-03-26 | 2016-11-23 | 汉能新材料科技有限公司 | A kind of flexible package composite membrane and manufacture method thereof |
| CN107446156A (en) * | 2017-08-22 | 2017-12-08 | 江苏泛亚微透科技股份有限公司 | Composite, its preparation method and its preparation facilities of graphite ene coatings are coated with eptfe membrane face |
| CN109755027A (en) * | 2019-01-10 | 2019-05-14 | 中国科学院金属研究所 | Composite graphite alkene film, high-energy ultracapacitor and intelligent flexible device |
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| CN1441507A (en) * | 2002-12-26 | 2003-09-10 | 潍坊青鸟华光电池有限公司 | Prepn of polyvinylidene difluoride film for secondary lithium ion battery |
| CN101557016A (en) * | 2008-04-09 | 2009-10-14 | 深圳市鸿德电池有限公司 | Process for preparing polymer lithium ion battery and product thereby |
| CN106159009A (en) * | 2015-03-26 | 2016-11-23 | 汉能新材料科技有限公司 | A kind of flexible package composite membrane and manufacture method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110769102A (en) * | 2019-11-15 | 2020-02-07 | Oppo广东移动通信有限公司 | Double-layer film structure, shell assembly and electronic device |
| CN110868823A (en) * | 2019-11-15 | 2020-03-06 | Oppo广东移动通信有限公司 | Housing assembly and electronic device |
| CN114672205A (en) * | 2020-12-24 | 2022-06-28 | 香港城市大学 | Radiation-cooled coating and surface coating method |
| CN114672205B (en) * | 2020-12-24 | 2023-03-14 | 香港城市大学 | Radiation-cooled coating and surface coating method |
| CN112770610A (en) * | 2021-01-15 | 2021-05-07 | 上海闻泰信息技术有限公司 | Preparation method of graphene heat dissipation film and graphene heat dissipation film |
| CN114436660A (en) * | 2022-02-22 | 2022-05-06 | 合肥工业大学 | Preparation method of carbon nano tube-ceramic composite membrane |
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Application publication date: 20190910 |
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