CN111171654A - Water-based graphene super-hydrophobic heat dissipation coating, preparation method thereof and testing device - Google Patents
Water-based graphene super-hydrophobic heat dissipation coating, preparation method thereof and testing device Download PDFInfo
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Abstract
The invention discloses a water-based graphene super-hydrophobic heat dissipation coating, a preparation method thereof and a testing device, wherein the water-based graphene super-hydrophobic heat dissipation coating comprises the following components: the preparation method comprises the following steps of (1) preparing graphene super-hydrophobic sol, a water-based hydroxyl acrylic acid dispersion, amino resin, an infrared radiation filler, a wetting agent, a film-forming auxiliary agent, a defoaming agent, a pH regulator and deionized water; the graphene hydrophobic sol is prepared from graphene, hydrophobic fumed silica, N-methyl pyrrolidone, an organic fluorine modifier and deionized water; according to the invention, a nano high-thermal-conductivity graphene functional material is introduced, a lotus leaf effect is simulated, a micro-nano structure mastoid and wax crystal surface coating is constructed, the hydrophobic self-cleaning function is realized, meanwhile, the effective heat dissipation area of the coating is increased by the structure, and a better heat dissipation effect is realized. The heat dissipation coating testing device provided by the invention can test the heat dissipation effect of the heat dissipation coating, and is simple to operate and high in precision.
Description
Technical Field
The invention relates to the technical field of heat dissipation coatings, in particular to a water-based graphene super-hydrophobic heat dissipation coating, a preparation method thereof and a testing device.
Background
Electronic components generate much heat during operation, and in order to dissipate heat as quickly as possible, metal heat sinks are usually added. However, the emissivity of the metal surface is low, and the heat collected on the metal surface is difficult to dissipate without convective heat transfer. The heat radiation efficiency of the metal surface is improved by a coating technology, and the method is an important way for improving the heat radiation performance of the metal material. Heat-dissipating coatings are widely used today in the rapid development of the electronics industry.
The thermal conductivity coefficient of the graphene is as high as 5300 w/(m.k), which is higher than that of the carbon nano tube and the diamond, and is one of the best heat conduction materials known in the world at present, compared with other granular heat dissipation fillers, a heat conduction network is easier to form, meanwhile, the high specific surface area of the graphene enables the graphene to be fully filled in a coating, the heat dissipation surface area of the coating is increased, the surface and internal temperature of an object can be reduced, and compared with a common heat dissipation coating, the infrared emissivity and the energy-saving effect are better.
At present, the graphene heat dissipation coating mainly has the following problems:
firstly, the application of graphene in the coating is mainly added in the form of functional filler, and due to the insolubility and high specific surface area of graphene and the van der waals force and pi-pi accumulation effect among sheets, the graphene is easy to irreversibly aggregate and precipitate in water, organic solvent and polymer under normal conditions, so that the adsorption capacity of the graphene is reduced, and the excellent characteristics of two-dimensional sheets of the graphene cannot be exerted, so that the improvement of the performance of the graphene reinforced composite material is influenced, and the heat dissipation effect is not obvious in the heat dissipation coating;
secondly, the graphene has high conductivity, and the addition amount of the graphene has great influence on the insulating property of the heat-dissipation coating, so that the popularization and application of the product are limited;
thirdly, the graphene heat dissipation coating needs to be further improved in the aspects of corrosion resistance, weather resistance, self-cleaning property and the like.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a water-based graphene super-hydrophobic heat dissipation coating, a preparation method thereof and a testing device.
The technical scheme for solving the technical problems is as follows:
a water-based graphene super-hydrophobic heat dissipation coating comprises the following raw materials: 35-45 parts of aqueous hydroxyl acrylic acid dispersoid, 20-35 parts of graphene super-hydrophobic sol, 5-10 parts of amino resin, 3-10 parts of nano infrared radiation filler, 0.1-0.5 part of wetting agent, 1-3 parts of film-forming additive, 0.05-0.1 part of defoaming agent, 0.1-0.3 part of pH regulator and 15-30 parts of deionized water.
The invention carries out modification treatment on graphene, improves the dispersibility of the graphene in the coating, solves the problems of aggregation and precipitation, adds the modified graphene in the form of hydrophobic sol, has better dispersibility in the coating compared with the mode of adding filler, and fully exerts the high heat-conducting property of the graphene.
Further, in a preferred embodiment of the present invention, the graphene superhydrophobic sol includes: graphene, hydrophobic fumed silica, N-methyl pyrrolidone, an organic fluorine modifier and deionized water, wherein the mass ratio of the graphene to the hydrophobic fumed silica to the organic fluorine modifier is (3-10): (1-5): (5-10): (2-5): (70-90), wherein the colloid particle size of the graphene super-hydrophobic sol is less than 20 μm.
Preferably, the organic fluorine modifier is one or more of perfluorosilane, perfluorooctanoic acid and perfluorosiloxane.
Further, in a preferred embodiment of the present invention, the hydroxyl group content of the aqueous hydroxyacrylic acid dispersion is 1.5 to 2% and the solid content is 40 to 50%.
Preferably, the aqueous hydroxyacrylic dispersion has a hydroxyl content of 1.8% and a solids content of 46%.
Further, in a preferred embodiment of the present invention, the particle size of the infrared radiation filler is 50 to 100 nm.
The filler has more excellent infrared radiation effect at 50-100nm infrared radiation, and further improves the heat dispersion of the coating.
Further, in a preferred embodiment of the present invention, the amino resin is hexamethoxy methyl melamine resin, the infrared radiation filler is one or a combination of carbon black, mica powder and silica powder, the wetting agent is an organic silicon gemini surfactant, the film-forming assistant is one or a combination of propylene glycol methyl ether acetate, alcohol ester dodecaacetate and propylene glycol butyl ether, the defoaming agent is an organic silicon defoaming agent, and the pH regulator is ammonia water and/or a multifunctional amine assistant AMP-95.
The preparation method of the water-based graphene super-hydrophobic heat dissipation coating comprises the steps of mixing 35-45 parts of water-based hydroxyl acrylic acid dispersoid and 20-35 parts of graphene super-hydrophobic sol, dispersing for 5-10min under the condition that the rotating speed is 500-700 r/min, then sequentially adding 10-15 parts of deionized water, 1-3 parts of film forming auxiliary agent, 0.1-0.5 part of wetting agent, 0.05-0.1 part of defoaming agent, 0.1-0.3 part of pH regulator and 3-10 parts of infrared radiation filler, fully mixing uniformly, then adding 5-10 parts of amino resin, and then adding the rest of deionized water to obtain the water-based graphene super-hydrophobic heat dissipation coating.
Further, in a preferred embodiment of the present invention, the graphene superhydrophobic sol is specifically prepared by the following steps:
according to the mass ratio of graphene to N-methyl pyrrolidone to organic fluorine modifier to deionized water (3-10): (1-5): (5-10): (2-5): (70-90) preparing raw materials, uniformly mixing graphene, 1/2N-methyl pyrrolidone and 1/3 deionized water, ultrasonically dispersing for 2.5-3h, adding 1/2 organic fluorine modifier, continuously ultrasonically dispersing for 1.5-2.5h, filtering, drying, and recovering super-hydrophobic powder; adding hydrophobic fumed silica, the rest 1/2 of N-methyl pyrrolidone, 1/2 of organic fluorine modifier and 2/3 of deionized water into the super-hydrophobic powder, uniformly mixing, processing the obtained mixed colloid by adopting a homogenizer, and testing the particle size of the mixed colloid to be less than 20 microns by using a scraper blade fineness meter to obtain the graphene super-hydrophobic sol.
Preferably, the ultrasonic dispersion time of the graphene, the N-methylpyrrolidone and the deionized water is 2.5h, 2.8h or 3 h; adding the organic fluorine modifier to continue ultrasonic dispersion for 1.5h, 2h or 2.5 h.
Testing arrangement of super hydrophobic heat dissipation coating of aqueous graphene includes: the testing device comprises a power adapter and a testing unit electrically connected with the power adapter; the test unit comprises a voltage regulating module, a voltage measuring meter, a test module and a temperature measuring instrument which are electrically connected in sequence; the test module comprises a ceramic piece electrically connected with the voltage measuring meter and a radiating fin used for setting the water-based graphene super-hydrophobic heat dissipation coating, the ceramic piece and the radiating fin are connected through a heat conduction silicone grease layer, and the ceramic piece and the radiating fin are respectively electrically connected with the temperature measuring instrument.
Further, in a preferred embodiment of the present invention, the test unit is multiple, and the multiple test units are connected to the power adapter in parallel.
The invention has the following beneficial effects:
according to the invention, the graphene is subjected to surface modification and then redispersed, so that the problem of graphene powder agglomeration is effectively solved, and meanwhile, the high heat conductivity of the graphene is fully displayed, so that the heat dissipation and cooling of the coating are more ideal; the graphene has obvious effect of strengthening and toughening the coating, and the coating with uniformity, smoothness and excellent mechanical property can be formed by a coating dry film of 5-10 mu m.
According to the invention, by adopting a simulated acoustics principle and utilizing a lotus leaf effect, a nano graphene functional material is introduced, so that a surface coating with low surface energy, micro-nano structure mastoid and wax crystal is constructed, a super-hydrophobic effect is achieved, and a self-cleaning function is endowed to the heat-dissipating coating; the micro-nano structure mastoid and wax crystal structure improves the microcosmic surface area of the coating after curing, and further improves the heat dissipation capability of the coating. The super-hydrophobic heat dissipation coating provided by the invention has a very excellent hydrophobic effect, and when 0.6 mu L of water drops are on the surface of the super-hydrophobic coating provided by the invention, the contact angle of different test zones is 162.11-167.90 degrees, and the rolling angle is 2 degrees.
The super-hydrophobic heat dissipation coating provided by the invention has the remarkable characteristics of thin coating and small thermal resistance, can excite the resonance effect on the surface of a metal radiator, remarkably improves the far infrared emission efficiency, and accelerates the rapid heat dissipation from the surface of the radiator.
The heat dissipation coating testing device provided by the invention can test the heat dissipation effect of the heat dissipation coating, and is simple to operate and high in precision. The preparation process of the water-based graphene super-hydrophobic heat dissipation coating provided by the invention is simple, and is beneficial to industrial large-scale production and application.
Drawings
Fig. 1 is a contact angle of an aqueous graphene superhydrophobic heat dissipation coating according to an embodiment of the invention.
FIG. 2 is a schematic diagram of the structure of the testing device of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1:
the water-based graphene super-hydrophobic heat dissipation coating is prepared according to the following steps:
putting 35 parts of aqueous hydroxyl acrylic acid dispersoid and 35 parts of graphene super-hydrophobic sol into a mixing container, adjusting the rotating speed of a dispersion machine to 500r/min, dispersing for 10min, then sequentially adding 15 parts of deionized water, 1 part of film-forming assistant, 0.1 part of wetting agent, 0.05 part of defoaming agent, 0.1 part of pH regulator and 3 parts of infrared radiation filler, fully and uniformly mixing, then adding 5 parts of amino resin, and then adding the rest deionized water to obtain the aqueous graphene super-hydrophobic heat-dissipation coating.
Further, the preparation process of the graphene super-hydrophobic sol is as follows:
according to the mass ratio of graphene to N-methyl pyrrolidone to the organic fluorine modifier to deionized water of 5: 4: 6: 3: 82, preparing raw materials, uniformly mixing graphene, 1/2N-methyl pyrrolidone and 1/3 deionized water, ultrasonically dispersing for 2.5 hours, adding 1/2 organic fluorine modifier, continuously ultrasonically dispersing for 1.5 hours, filtering, drying, and recovering super-hydrophobic powder; adding hydrophobic fumed silica, the rest 1/2 of N-methyl pyrrolidone, 1/2 of organic fluorine modifier and 2/3 of deionized water into the super-hydrophobic powder, uniformly mixing, processing the obtained mixed colloid by adopting a homogenizer, and testing the particle size of the mixed colloid to be less than 20 microns by using a scraper blade fineness meter to obtain the graphene super-hydrophobic sol.
Example 2:
the water-based graphene super-hydrophobic heat dissipation coating is prepared according to the following steps:
putting 45 parts of aqueous hydroxyl acrylic acid dispersoid and 20 parts of graphene super-hydrophobic sol into a mixing container, adjusting the rotating speed of a dispersion machine to 700r/min, dispersing for 5min, then sequentially adding 10 parts of deionized water, 3 parts of film-forming additive, 0.5 part of wetting agent, 0.1 part of defoaming agent, 0.3 part of pH regulator and 3 parts of infrared radiation filler, fully and uniformly mixing, then adding 10 parts of amino resin, and then adding the rest deionized water to obtain the aqueous graphene super-hydrophobic heat-dissipation coating.
Further, the preparation process of the graphene super-hydrophobic sol is as follows:
according to the mass ratio of graphene to N-methyl pyrrolidone to the organic fluorine modifier to deionized water of 3: 5: 10: 2: 80, preparing raw materials, uniformly mixing graphene, 1/2N-methyl pyrrolidone and 1/3 deionized water, carrying out ultrasonic dispersion for 3 hours, adding 1/2 organic fluorine modifier, continuing ultrasonic dispersion for 2 hours, filtering, drying, and recovering super-hydrophobic powder; adding hydrophobic fumed silica, the rest 1/2 of N-methyl pyrrolidone, 1/2 of organic fluorine modifier and 2/3 of deionized water into the super-hydrophobic powder, uniformly mixing, processing the obtained mixed colloid by adopting a homogenizer, and testing the particle size of the mixed colloid to be less than 20 microns by using a scraper blade fineness meter to obtain the graphene super-hydrophobic sol.
Example 3:
the water-based graphene super-hydrophobic heat dissipation coating is prepared according to the following steps:
putting 40 parts of aqueous hydroxyl acrylic acid dispersoid and 30 parts of graphene super-hydrophobic sol into a mixing container, adjusting the rotating speed of a dispersion machine to 700r/min, dispersing for 5min, then sequentially adding 10 parts of deionized water, 1 part of film-forming assistant, 0.3 part of wetting agent, 0.07 part of defoaming agent, 0.2 part of pH regulator and 10 parts of infrared radiation filler, fully and uniformly mixing, then adding 8 parts of amino resin, and then adding the rest deionized water to obtain the aqueous graphene super-hydrophobic heat-dissipation coating.
Further, the preparation process of the graphene super-hydrophobic sol is as follows:
according to the mass ratio of graphene to N-methyl pyrrolidone to the organic fluorine modifier to deionized water of 8: 2: 8:4: 78, preparing raw materials, uniformly mixing graphene, 1/2N-methyl pyrrolidone and 1/3 deionized water, carrying out ultrasonic dispersion for 3 hours, adding 1/2 organic fluorine modifier, continuing ultrasonic dispersion for 2.5 hours, filtering, drying, and recovering super-hydrophobic powder; adding hydrophobic fumed silica, the rest 1/2 of N-methyl pyrrolidone, 1/2 of organic fluorine modifier and 2/3 of deionized water into the super-hydrophobic powder, uniformly mixing, processing the obtained mixed colloid by adopting a homogenizer, and testing the particle size of the mixed colloid to be less than 20 microns by using a scraper blade fineness meter to obtain the graphene super-hydrophobic sol.
Example 4:
the water-based graphene super-hydrophobic heat dissipation coating is prepared according to the following steps:
putting 45 parts of aqueous hydroxyl acrylic acid dispersoid and 35 parts of graphene super-hydrophobic sol into a mixing container, adjusting the rotating speed of a dispersion machine to 500r/min, dispersing for 10min, then sequentially adding 15 parts of deionized water, 3 parts of film-forming additive, 0.2 part of wetting agent, 0.05 part of defoaming agent, 0.2 part of pH regulator and 8 parts of infrared radiation filler, fully and uniformly mixing, then adding 10 parts of amino resin, and then adding the rest deionized water to obtain the aqueous graphene super-hydrophobic heat-dissipation coating.
Further, the preparation process of the graphene super-hydrophobic sol is as follows:
according to the mass ratio of graphene to N-methyl pyrrolidone to the organic fluorine modifier to deionized water of 10: 5: 10: 5: 70, preparing raw materials, uniformly mixing graphene, 1/2 part of N-methyl pyrrolidone and 1/3 of deionized water, carrying out ultrasonic dispersion for 2.8 hours, adding 1/2 part of organic fluorine modifier, continuing to carry out ultrasonic dispersion for 1.5 hours, filtering, drying, and recovering super-hydrophobic powder; adding hydrophobic fumed silica, the rest 1/2 of N-methyl pyrrolidone, 1/2 of organic fluorine modifier and 2/3 of deionized water into the super-hydrophobic powder, uniformly mixing, processing the obtained mixed colloid by adopting a homogenizer, and testing the particle size of the mixed colloid to be less than 20 microns by using a scraper blade fineness meter to obtain the graphene super-hydrophobic sol.
Example 5:
the water-based graphene super-hydrophobic heat dissipation coating is prepared according to the following steps:
putting 35 parts of aqueous hydroxyl acrylic acid dispersoid and 30 parts of graphene super-hydrophobic sol into a mixing container, adjusting the rotating speed of a dispersion machine to 700r/min, dispersing for 8min, then sequentially adding 10 parts of deionized water, 1 part of film-forming assistant, 0.4 part of wetting agent, 0.08 part of defoaming agent, 0.1 part of pH regulator and 5 parts of infrared radiation filler, fully and uniformly mixing, then adding 5 parts of amino resin, and then adding the rest deionized water to obtain the aqueous graphene super-hydrophobic heat-dissipation coating.
Further, the preparation process of the graphene super-hydrophobic sol is as follows:
according to the mass ratio of graphene to N-methyl pyrrolidone to the organic fluorine modifier to deionized water of 3: 1: 5: 2: 90, preparing raw materials, uniformly mixing graphene, 1/2 part of N-methyl pyrrolidone and 1/3 part of deionized water, ultrasonically dispersing for 2.5 hours, adding 1/2 part of organic fluorine modifier, continuously ultrasonically dispersing for 2 hours, filtering, drying, and recovering super-hydrophobic powder; adding hydrophobic fumed silica, the rest 1/2 of N-methyl pyrrolidone, 1/2 of organic fluorine modifier and 2/3 of deionized water into the super-hydrophobic powder, uniformly mixing, processing the obtained mixed colloid by adopting a homogenizer, and testing the particle size of the mixed colloid to be less than 20 microns by using a scraper blade fineness meter to obtain the graphene super-hydrophobic sol.
Example 6:
as shown in fig. 2, the testing apparatus for the aqueous graphene superhydrophobic heat dissipation coating includes: the test device comprises a power adapter and a test unit electrically connected with the power adapter. The number of the test units may be plural, and the plural test units are connected to the power adapter in parallel, and fig. 2 shows two test units.
The test unit comprises a voltage regulating module, a voltage measuring meter, a test module and a temperature measuring instrument which are sequentially and electrically connected. The test module comprises a ceramic chip electrically connected with the voltage measuring meter and a radiating fin used for arranging the water-based graphene super-hydrophobic heat dissipation coating. The ceramic plate is connected with the radiating fin through the heat-conducting silicone grease layer. The ceramic plate and the radiating fin are respectively electrically connected with the temperature measuring instrument. In this embodiment, the voltage measuring meter is a digital voltage measuring meter. The temperature measuring instrument is a thermocouple.
When the testing device is used for testing the heat dissipation effect, the device needs to be placed in a constant-temperature laboratory for testing. The rated voltage of the power adapter is 12V, and the maximum current is 1A. The maximum input voltage of the direct current voltage regulating module is 36V, the maximum current is 8A, and the maximum power is 200W. The maximum input voltage of the digital voltage measuring meter is 100V, the maximum current is 10A, the digital voltage measuring meter is used for measuring the voltage, the current and the power output by the voltage regulating module, and the lower part of the digital voltage measuring meter is connected with the alumina ceramic heating sheet. The size of the heating plate of the alumina ceramic is 10 × 1.2mm or 15 × 1.2mm, and the static power is 4-30W. The heat-conducting silicone grease is used for filling gaps between the ceramic heating plate and the radiating fins and conducting heat on the ceramic heating plate to the radiating fins, and preferably the heat-conducting silicone grease has a heat-conducting coefficient of 2.0 w/m.k and a working temperature of-50 ℃ to 220 ℃. The heat sink is made of copper or aluminum alloy and has a size equivalent to that of the ceramic heating plate. The temperature measuring range of the thermocouple thermometer is-50 ℃ to 200 ℃, and the resolution is 0.1 ℃.
Examples of the experiments
First, testing the technical index of the heat-dissipating coating
In order to demonstrate the technical effects brought by the technical scheme of the invention, the aqueous graphene super-hydrophobic heat dissipation coating is prepared according to the embodiments 1-5, and the detection is carried out according to the following test standards, and the test results are shown in table 1.
The artificial weathering resistance test in Table 1 was determined according to the standard of GB/T9276-1996;
the neutral salt spray resistance test in Table 1 is determined according to the standard of GB/T1771-2007;
adhesion tests in Table 1 were determined according to the Standard of GB/T1720-79 (89);
the hardness test in Table 1 was determined according to the standard of GB/T6739-1996;
the impact test in Table 1 was determined according to the standard of GB/T1732-93;
the insulation test in Table 1 is determined according to the standard of GB/T8754-2006;
the paint film flexibility test in Table 1 was determined according to the standard of GB T1731-1993;
the infrared emissivity test in table 1 refers to the internationally recognized ASTM C1371 standard, and requires that the emissivity be obtained using a test instrument following the ASTM C1371 procedure.
Table 1 technical index test data of heat-dissipating coating
From the above results, it can be seen that all of experimental examples 1 to 5 have a high thermal emissivity, and the heat dissipation coating film has excellent hardness, adhesion, corrosion resistance, aging resistance, self-cleaning property, insulation property, and the like.
Secondly, testing the heat dissipation effect:
(1) selecting a blank radiating fin (the size is 10 x 1-2 mm) which is not coated with radiating coating, uniformly coating a small amount of heat-conducting silicone grease, placing the radiating fin on an alumina ceramic heating fin, switching on a power supply, adjusting a voltage reduction module (the voltage is 10.5V, and the power is 1.7W), testing for not less than 1h, and recording the surface temperatures of the ceramic fin and the radiating fin when the variation range of the temperature value of a thermocouple is within 0.2 ℃.
(2) The heat dissipation fins coated with the heat dissipation coatings in examples 1 to 5 were tested according to the experimental procedure in (1), and the surface temperatures of the ceramic sheet and the heat dissipation fins were recorded, and the experimental data are shown in the following table.
TABLE 2 Heat dissipation Effect test data
From the above results, it can be seen that the surface temperature of the heat sink coated with the heat dissipation coating is significantly lower than that of the blank heat sink, the temperature of the ceramic heating plate is significantly reduced, and the temperature reduction range is 8-10 ℃, which indicates that the heat dissipation coating of the present invention has a better heat dissipation effect.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The water-based graphene super-hydrophobic heat dissipation coating is characterized by comprising the following raw materials: 35-45 parts of aqueous hydroxyl acrylic acid dispersoid, 20-35 parts of graphene super-hydrophobic sol, 5-10 parts of amino resin, 3-10 parts of nano infrared radiation filler, 0.1-0.5 part of wetting agent, 1-3 parts of film-forming additive, 0.05-0.1 part of defoaming agent, 0.1-0.3 part of pH regulator and 15-30 parts of deionized water.
2. The aqueous graphene superhydrophobic heat dissipation coating of claim 1, wherein the graphene superhydrophobic sol comprises: graphene, hydrophobic fumed silica, N-methyl pyrrolidone, an organic fluorine modifier and deionized water, wherein the mass ratio of the graphene to the hydrophobic fumed silica to the organic fluorine modifier is (3-10): (1-5): (5-10): (2-5): (70-90), wherein the colloidal particle size of the graphene super-hydrophobic sol is less than 20 μm.
3. The aqueous graphene superhydrophobic heat dissipation coating of claim 1 or 2, wherein the aqueous hydroxyl acrylic dispersion has a hydroxyl content of 1.5-2% and a solid content of 40-50%.
4. The aqueous graphene superhydrophobic heat dissipation coating of claim 1 or 2, wherein the nanoscale infrared radiation filler has a particle size of 50-100 nm.
5. The aqueous graphene superhydrophobic heat dissipation coating of claim 1 or 2,
the amino resin is hexamethoxy methyl melamine resin,
the nano-grade infrared radiation filler is one or a combination of more of carbon black, mica powder and silica powder,
the wetting agent is an organic silicon gemini structure surfactant,
the film-forming assistant is one or the combination of more of propylene glycol methyl ether acetate, alcohol ester dodeca and propylene glycol butyl ether,
the defoaming agent is an organic silicon defoaming agent,
the pH regulator is ammonia water and/or a multifunctional amine assistant AMP-95.
6. The preparation method of the aqueous graphene superhydrophobic heat dissipation coating according to any one of claims 1-5, characterized by mixing 35-45 parts of aqueous hydroxyl acrylic acid dispersoid and 20-35 parts of graphene superhydrophobic sol, dispersing for 5-10min at a rotation speed of 500-700 r/min, then sequentially adding 10-15 parts of deionized water, 1-3 parts of film forming auxiliary agent, 0.1-0.5 part of wetting agent, 0.05-0.1 part of defoaming agent, 0.1-0.3 part of pH regulator and 3-10 parts of infrared radiation filler, fully mixing uniformly, then adding 5-10 parts of amino resin, and then adding the rest of deionized water to obtain the aqueous graphene superhydrophobic heat dissipation coating.
7. The preparation method according to claim 6, wherein the graphene superhydrophobic sol is prepared by the following specific steps:
according to the mass ratio of graphene to N-methyl pyrrolidone to organic fluorine modifier to deionized water (3-10): (1-5): (5-10): (2-5): (70-90) preparing raw materials, uniformly mixing graphene, 1/2N-methyl pyrrolidone and 1/3 deionized water, ultrasonically dispersing for 2.5-3h, adding 1/2 organic fluorine modifier, continuously ultrasonically dispersing for 1.5-2.5h, filtering, drying, and recovering super-hydrophobic powder; adding hydrophobic fumed silica, the rest 1/2 of N-methyl pyrrolidone, 1/2 of organic fluorine modifier and 2/3 of deionized water into the super-hydrophobic powder, uniformly mixing, processing the obtained mixed colloid by adopting a homogenizer, and testing the particle size of the mixed colloid to be less than 20 microns by using a scraper blade fineness meter to obtain the graphene super-hydrophobic sol.
8. The testing device for the water-based graphene superhydrophobic heat dissipation coating of any one of claims 1-5, comprising: the testing device comprises a power adapter and a testing unit electrically connected with the power adapter;
the test unit comprises a voltage regulating module, a voltage measuring meter, a test module and a temperature measuring instrument which are electrically connected in sequence; the test module comprises a ceramic wafer and a radiating fin, wherein the ceramic wafer is electrically connected with the voltage measuring meter, the radiating fin is used for setting the water-based graphene super-hydrophobic heat dissipation coating, the ceramic wafer is connected with the radiating fin through a heat conduction silicone layer, and the ceramic wafer and the radiating fin are respectively electrically connected with the temperature measuring instrument.
9. The test device of claim 8, wherein the test unit is plural, and a plurality of test units are connected in parallel to the power adapter.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112175200A (en) * | 2020-10-15 | 2021-01-05 | 三棵树(上海)新材料研究有限公司 | Silicon dioxide-containing composite hydroxyl acrylic acid dispersion and preparation method and application thereof |
| CN113025137A (en) * | 2020-09-18 | 2021-06-25 | 深圳市烯世传奇科技有限公司 | Graphene conductive coating, preparation method thereof and graphene conductive coating |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393148A (en) * | 2008-10-22 | 2009-03-25 | 河北工业大学 | Test device for coating heat dispersion and test method thereof |
| CN107629593A (en) * | 2017-09-15 | 2018-01-26 | 河北晨阳工贸集团有限公司 | Electrical equipment water-soluble multifunctional coating and preparation method thereof |
| CN109504212A (en) * | 2018-10-30 | 2019-03-22 | 绵阳麦思威尔科技有限公司 | A kind of watersoluble plumbago alkene super-hydrophobic self-cleaning paint and preparation method thereof for air-conditioning heat exchanger |
| US20190338146A1 (en) * | 2018-05-07 | 2019-11-07 | Nanotek Instruments, Inc. | Graphene-Enabled Anti-Corrosion Coating |
-
2020
- 2020-01-09 CN CN202010020221.0A patent/CN111171654A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393148A (en) * | 2008-10-22 | 2009-03-25 | 河北工业大学 | Test device for coating heat dispersion and test method thereof |
| CN107629593A (en) * | 2017-09-15 | 2018-01-26 | 河北晨阳工贸集团有限公司 | Electrical equipment water-soluble multifunctional coating and preparation method thereof |
| US20190338146A1 (en) * | 2018-05-07 | 2019-11-07 | Nanotek Instruments, Inc. | Graphene-Enabled Anti-Corrosion Coating |
| CN109504212A (en) * | 2018-10-30 | 2019-03-22 | 绵阳麦思威尔科技有限公司 | A kind of watersoluble plumbago alkene super-hydrophobic self-cleaning paint and preparation method thereof for air-conditioning heat exchanger |
Non-Patent Citations (1)
| Title |
|---|
| 李月锋等: "《LED热管理丛书 LED热管理及散热技术应用》", 30 September 2018, 上海：上海科学技术出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113025137A (en) * | 2020-09-18 | 2021-06-25 | 深圳市烯世传奇科技有限公司 | Graphene conductive coating, preparation method thereof and graphene conductive coating |
| CN112175200A (en) * | 2020-10-15 | 2021-01-05 | 三棵树(上海)新材料研究有限公司 | Silicon dioxide-containing composite hydroxyl acrylic acid dispersion and preparation method and application thereof |
| CN112175200B (en) * | 2020-10-15 | 2022-05-03 | 三棵树(上海)新材料研究有限公司 | Silicon dioxide-containing composite hydroxyl acrylic acid dispersion and preparation method and application thereof |
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