CN109988484A - A kind of graphene water-based cooling coating and preparation method thereof - Google Patents
A kind of graphene water-based cooling coating and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of graphene water-based cooling coating, this heat radiation coating is using water as diluent, using graphene dispersing solution and conductive powder dispersion pulp as composite heat-conducting filler component, graphene is set to reach good dispersity in coating, three-dimensional heat conduction network interconnected is formed in coat inside with the conductive powder after grinding distribution, it is effectively improved longitudinal heat conductivity of heat radiation coating, in conjunction with the heat radiation that graphene is excellent, significantly improves the heat dissipation performance of heat radiation coating.
Description
Technical field
The present invention relates to paint fields more particularly to a kind of graphene water-based cooling coating and preparation method thereof.It can be extensive
Radiator applied to electric equipment products such as mobile phone, computer, chip, LED illumination, engine, heat exchanger, battery packs applies
Layer, has broad application prospects in high efficiency and heat radiation application field.
Background technique
With the high speed development of modern electronics industry, each electronic product and component constantly towards micromation, lightweight,
Integrated, high power direction is developed.These electronic products can generate a large amount of heat in use, if heat without
Method distributes in time, will lead to electronic product temperature and is too high to work normally, to greatly influence its performance
And service life.Heat dissipation problem has become one of the main bugbear for restricting electronic industry development at present.
Heat radiation coating can improve object table by enhancing heat source surface infrared emittance as a kind of functional coating
The radiating efficiency in face, to achieve the purpose that reduce body surface temperature.In the field for needing high efficiency and heat radiation, due to by dimensioning
The restriction of very little, space and environment becomes preferred solution using the enhancing infra-red radiation heat dissipation of thermal dispersant coatings technology.Therefore, exist
Electronic device surface applies a kind of extensive concern of the heat radiation coating as efficient radiating treatment mode by electronic enterprises.
Graphene is a kind of novel two-dimension nano materials, has the characteristics such as intensity height, large specific surface area, thermal conductivity height,
Thermal coefficient is up to 5300W/ (mK) at room temperature, is best one of the material of current known thermal conductivity.In addition, graphene
Heat emissivity coefficient is more than 0.95, much higher than copper about 0.09 and the heat emissivity coefficient of aluminium about 0.02.Therefore, in cooling application, make
It uses graphene as heat dissipation filler, its excellent heat transfer and heat-radiating properties can be played simultaneously.Currently, using graphene system
Heat radiation coating made of standby is mostly organic solvent type, is easy to cause serious injury environment and human body in use process, with
The requirements of national environmental protection policies and regulations be continuously improved, develop environmental-friendly, efficient water-based cooling coating as heat-radiation coating
Expect the important directions of industry research.
Summary of the invention
The purpose of the present invention is to provide a kind of graphene water-based cooling coating, this heat radiation coating using water as diluent, with
Graphene and inorganic conduction powder increase the hot spoke of coating using the nano-lamellar structure of graphene as composite heat-conducting filler
Area is penetrated, in combination with the heat conductivity that graphene is excellent, forms three-dimensional heat conduction network with the inorganic conduction powder of high thermal conductivity,
Collaboration improves the heat conductivity of coating, to reach good heat dissipation effect.
The technical scheme is that a kind of graphene water-based cooling coating, using water as diluent, using graphene dispersion
Liquid and conductive powder dispersion pulp are as composite heat-conducting filler component.
Further, it is made of host agent, waterborne curing agent and diluent, according to mass ratio, the host agent: aqueous solidified
Agent: diluent 7-13:2-5:0.5-2；Wherein, diluent is water；
In parts by weight, the host agent includes:
Further, the water-base resin is water-based acrylic resin, waterborne organic silicon resin, aqueous epoxy resins or water
The combination of one or more of property polyurethane resin.
Further, include graphene in the graphene dispersing solution, also include carbon nanotube, nano carbon black, nanogold
The combination of the nano-carbon material of one or more of hard rock, nano carbon microsphere, water and dispersing agent；Wherein, graphene is received
Rice carbon material, dispersing agent, the mass ratio of water are 5-12:1-10:0.5-3:150-300.
It further, include boron nitride, silicon carbide, ball-aluminium oxide, zinc oxide, silicon nitride in the conductive powder dispersion pulp
One or more kinds of conductive powders combination, dispersing agent, anti-settling agent, diluent；Wherein, conductive powder, dispersing agent, anti-settling agent,
The mass ratio of diluent are as follows: 80-100:0.5-2.5:6-11:40-70.
The present invention also provides a kind of methods for preparing the graphene water-based cooling coating, the specific steps are as follows: by institute
Graphene dispersing solution, conductive powder dispersion pulp, water-base resin, anti-settling agent, levelling agent, defoaming agent, promotor are stated in 2000-
15-40min is stirred under the revolving speed of 4000rpm, is sufficiently mixed uniformly, host agent is obtained after filtering；By the host agent, aqueous solidified
Agent, diluent mix in proportion, stir 15-40min under the revolving speed of 1000-3000rpm using high speed disperser, then filter
Obtain the graphene water-based cooling coating.
Further, the preparation method of the graphene dispersing solution, the specific steps are as follows: needed in graphene dispersing solution
Powder is added in container, and dispersing agent and diluent is added, and disperses 15-45min using ultrasonic wave, obtains stable graphene point
Dispersion liquid；Required powder is graphene and carbon nanotube, nano carbon black, Nano diamond, nano-sized carbon in the graphene dispersing solution
The combination of one or more of ball nano-carbon material；Wherein: according to mass ratio, graphene: nano-carbon material: dispersion
Agent: water=5-12:1-10:0.5-3:150-300.
Further, the preparation method of the conductive powder dispersion pulp, the specific steps are as follows: needed in conductive powder dispersion pulp
Powder is added in container, and dispersing agent, anti-settling agent, diluent is added, and dispersion machine is sanded using high speed and is dispersed with stirring 20-50min,
Revolving speed is 2000-5000rpm；Required powder is boron nitride, silicon carbide, ball-aluminium oxide, oxidation in the conductive powder dispersion pulp
Zinc, silicon nitride one or more kinds of powders combination；Wherein, according to mass ratio, boron nitride, silicon carbide, ball-aluminium oxide,
Zinc oxide, silicon nitride one or more kinds of powders combination: dispersing agent: anti-settling agent: diluent=80-100:0.5-2.5:
6-11:40-70。
Graphene water-based cooling coating of the invention is tested and assessed as follows, as a result as follows:
| Detection project | Technical indicator |
| Adhesive force (grade) | ≤1 |
| Flexibility (mm) | ≤1 |
| Impact resistance (cm) | ≥50 |
| Hardness (pencil method) | ≥2H |
| Resistance to neutral salt spray (h) | ≥300 |
| Thermal coefficient (W/mK) | 3.0 |
The beneficial effects of the present invention are:
1, for the graphene water-based cooling coating in the present invention using water as diluent, the content of volatile organic matter is extremely low, is
A kind of heat radiation coating of safety and environmental friendliness type.
2, make graphene in coating as composite heat-conducting filler component using graphene dispersing solution and conductive powder dispersion pulp
Reach good dispersity, form three-dimensional heat conduction network interconnected in coat inside with the conductive powder after grinding distribution,
It is effectively improved longitudinal heat conductivity of heat radiation coating, in conjunction with the heat radiation that graphene is excellent, significantly improves dissipating for heat radiation coating
Hot property.
3, the heat radiation coating is strong to matrix adhesive force, coating hardness height, perfect heat-dissipating, while also having good anti-corrosion
Corrosion.
4, preparation process is simple, easy to operate, and cost is controllable, is easy to large-scale production.
Specific embodiment
Embodiment 1
A kind of present invention: graphene water-based cooling coating is described in detail below with reference to embodiment, by host agent, waterborne curing agent and dilute
Release agent composition, host agent: waterborne curing agent: diluent 10:3:0.8.
In parts by weight, the host agent includes:
Wherein, according to mass ratio:
The composition of graphene dispersing solution are as follows: graphene: nano-carbon material: dispersing agent: water=8:6:2:180.Nano carbon material
Material selects carbon nanotube.
The composition of conductive powder dispersion pulp are as follows: conductive powder, dispersing agent, anti-settling agent, diluent=: 85:0.8:7:50.Conductive powder
Select boron nitride.
The preparation process of graphene water-based cooling coating is as follows:
(1) preparation of graphene dispersing solution
According to parts by weight, by 8 parts of Graphene powder, 6 parts of nano-carbon material, 2 parts of dispersing agent, 180 parts of diluent mixing are equal
After even, 30min is dispersed using ultrasonic wave, obtains stable graphene dispersing solution；
(2) preparation of conductive powder dispersion pulp
According to parts by weight, 85 parts of conductive powder are added in container, are added 0.8 part of dispersing agent, 7 parts of anti-settling agent, dilute
50 parts of agent, dispersion machine is sanded using high speed and is dispersed with stirring 45min, revolving speed 3500rpm, obtains stable conductive powder dispersion pulp；
By above-mentioned graphene dispersing solution, conductive powder dispersion pulp, aqueous epoxy resins, anti-settling agent, levelling agent, defoaming agent, rush
30min is stirred under the revolving speed of 2500rpm into agent, is sufficiently mixed uniformly, host agent is obtained after filtering；By the host agent, aqueous solid
Agent, diluent are mixed in the ratio, and 25min is stirred under the revolving speed of 2000rpm using high speed disperser, and then filtering is
Obtain the graphene water-based cooling coating.
The graphene water-based cooling coating of the embodiment is tested and assessed as follows, as a result as follows:
Embodiment 2
A kind of present invention: graphene water-based cooling coating is described in detail below with reference to embodiment, by host agent, waterborne curing agent and dilute
Release agent composition, host agent: waterborne curing agent: diluent 12:4:1.4.
In parts by weight, the host agent includes:
Wherein, according to mass ratio:
The composition of graphene dispersing solution are as follows: graphene: nano-carbon material: dispersing agent: water=10:8:2.5:260.Nano-sized carbon
Material selection Nano diamond.
The composition of conductive powder dispersion pulp are as follows: conductive powder, dispersing agent, anti-settling agent, diluent=: 95:1.5:10:65.It is thermally conductive
Powder selects ball-aluminium oxide.
The preparation process of graphene water-based cooling coating is as follows:
(1) preparation of graphene dispersing solution
According to parts by weight, by 10 parts of Graphene powder, 8 parts of nano-carbon material, 2.5 parts of dispersing agent, 260 parts of diluent are mixed
After uniformly, 30min is dispersed using ultrasonic wave, obtains stable graphene dispersing solution；
(2) preparation of conductive powder dispersion pulp
According to parts by weight, 95 parts of conductive powder are added in container, are added 1.5 parts of dispersing agent, 10 parts of anti-settling agent, dilute
65 parts of agent, dispersion machine is sanded using high speed and is dispersed with stirring 50min, revolving speed 3500rpm, obtains stable conductive powder dispersion pulp；
By above-mentioned graphene dispersing solution, conductive powder dispersion pulp, aqueous epoxy resins, anti-settling agent, levelling agent, defoaming agent, rush
35min is stirred under the revolving speed of 3000rpm into agent, is sufficiently mixed uniformly, host agent is obtained after filtering；By the host agent, aqueous solid
Agent, diluent are mixed in the ratio, and 30min is stirred under the revolving speed of 2500rpm using high speed disperser, and then filtering is
Obtain the graphene water-based cooling coating.
The graphene water-based cooling coating of the embodiment is tested and assessed as follows, as a result as follows:
| Detection project | Technical indicator |
| Adhesive force (grade) | ≤1 |
| Flexibility (mm) | ≤1 |
| Impact resistance (cm) | ≥50 |
| Hardness (pencil method) | ≥2H |
| Resistance to neutral salt spray (h) | ≥380 |
| Thermal coefficient (W/mK) | 3.4 |
Embodiment 3
A kind of present invention: graphene water-based cooling coating is described in detail below with reference to embodiment, by host agent, waterborne curing agent and dilute
Release agent composition, host agent: waterborne curing agent: diluent 9:3.5:1.8.
In parts by weight, the host agent includes:
Wherein, according to mass ratio:
The composition of graphene dispersing solution are as follows: graphene: nano-carbon material: dispersing agent: water=9:7:2:240.Nano carbon material
Material selects the combination of nano carbon black and Nano diamond.
The composition of conductive powder dispersion pulp are as follows: conductive powder, dispersing agent, anti-settling agent, diluent=: 90:1.8:9:60.Conductive powder
Select the combination of zinc oxide and silicon nitride.
The preparation process of graphene water-based cooling coating is as follows:
(1) preparation of graphene dispersing solution
According to parts by weight, by 9 parts of Graphene powder, 7 parts of nano-carbon material, 2 parts of dispersing agent, 240 parts of diluent mixing are equal
After even, 40min is dispersed using ultrasonic wave, obtains stable graphene dispersing solution；
(2) preparation of conductive powder dispersion pulp
According to parts by weight, 90 parts of conductive powder are added in container, are added 1.8 parts of dispersing agent, 9 parts of anti-settling agent, dilute
60 parts of agent, dispersion machine is sanded using high speed and is dispersed with stirring 45min, revolving speed 3200rpm, obtains stable conductive powder dispersion pulp；
By above-mentioned graphene dispersing solution, conductive powder dispersion pulp, aqueous epoxy resins, anti-settling agent, levelling agent, defoaming agent, rush
25min is stirred under the revolving speed of 2300rpm into agent, is sufficiently mixed uniformly, host agent is obtained after filtering；By the host agent, aqueous solid
Agent, diluent are mixed in the ratio, and 30min is stirred under the revolving speed of 2500rpm using high speed disperser, and then filtering is
Obtain the graphene water-based cooling coating.
The graphene water-based cooling coating of the embodiment is tested and assessed as follows, as a result as follows:
| Detection project | Technical indicator |
| Adhesive force (grade) | ≤1 |
| Flexibility (mm) | ≤1 |
| Impact resistance (cm) | ≥50 |
| Hardness (pencil method) | ≥2H |
| Resistance to neutral salt spray (h) | ≥320 |
| Thermal coefficient (W/mK) | 3.0 |
Embodiment 4
A kind of present invention: graphene water-based cooling coating is described in detail below with reference to embodiment, by host agent, waterborne curing agent and dilute
Release agent composition, host agent: waterborne curing agent: diluent 8:2.6:1.5.
In parts by weight, the host agent includes:
Wherein, according to mass ratio:
The composition of graphene dispersing solution are as follows: graphene: nano-carbon material: dispersing agent: water=11:9:2.5:280.Nano-sized carbon
The combination of material selection carbon nanotube and nano carbon black.
The composition of conductive powder dispersion pulp are as follows: conductive powder, dispersing agent, anti-settling agent, diluent=: 86:1.6:10:65.It is thermally conductive
The combination of powder selection boron nitride and silicon carbide.
The preparation process of graphene water-based cooling coating is as follows:
(1) preparation of graphene dispersing solution
According to parts by weight, by 11 parts of Graphene powder, 9 parts of nano-carbon material, 9 parts of dispersing agent, 240 parts of diluent mixing are equal
After even, 45min is dispersed using ultrasonic wave, obtains stable graphene dispersing solution；
(2) preparation of conductive powder dispersion pulp
According to parts by weight, 86 parts of conductive powder are added in container, are added 1.6 parts of dispersing agent, 10 parts of anti-settling agent, dilute
65 parts of agent, dispersion machine is sanded using high speed and is dispersed with stirring 40min, revolving speed 3500rpm, obtains stable conductive powder dispersion pulp；
By above-mentioned graphene dispersing solution, conductive powder dispersion pulp, aqueous epoxy resins, anti-settling agent, levelling agent, defoaming agent, rush
35min is stirred under the revolving speed of 2800rpm into agent, is sufficiently mixed uniformly, host agent is obtained after filtering；By the host agent, aqueous solid
Agent, diluent are mixed in the ratio, and 35min is stirred under the revolving speed of 3000rpm using high speed disperser, and then filtering is
Obtain the graphene water-based cooling coating.
The graphene water-based cooling coating of the embodiment is tested and assessed as follows, as a result as follows:
For graphene water-based cooling coating in above-mentioned implementation using water as diluent, the content of volatile organic matter is extremely low,
It is a kind of heat radiation coating of safety and environmental friendliness type.It is filled out with conductive powder dispersion pulp as composite heat-conducting using graphene dispersing solution
Expect component, so that graphene is reached good dispersity in coating, formed with the conductive powder after grinding distribution in coat inside
Solid heat conduction network interconnected, is effectively improved longitudinal heat conductivity of heat radiation coating, in conjunction with the heat radiation that graphene is excellent
Property, significantly improve the heat dissipation performance of heat radiation coating.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of graphene water-based cooling coating, it is characterised in that: using water as diluent, using graphene dispersing solution and conductive powder
Dispersion pulp is as composite heat-conducting filler component.
2. a kind of graphene water-based cooling coating according to claim 1, it is characterised in that: by host agent, waterborne curing agent
It is formed with diluent, according to mass ratio, the host agent: waterborne curing agent: diluent 7-13:2-5:0.5-2；Wherein, it dilutes
Agent is water；
In parts by weight, the host agent includes:
3. a kind of graphene water-based cooling coating according to claim 2, it is characterised in that: the water-base resin is aqueous
The group of one or more of acrylic resin, waterborne organic silicon resin, aqueous epoxy resins or waterborne polyurethane resin
It closes.
4. a kind of graphene water-based cooling coating according to claim 2, it is characterised in that: in the graphene dispersing solution
It also include receiving for one or more of carbon nanotube, nano carbon black, Nano diamond, nano carbon microsphere comprising graphene
The combination of rice carbon material, water and dispersing agent；Wherein, graphene, nano-carbon material, dispersing agent, the mass ratio of water are 5-12:1-
10:0.5-3:150-300.
5. a kind of graphene water-based cooling coating according to claim 2, it is characterised in that: in the conductive powder dispersion pulp
The combination of one or more kinds of conductive powders comprising boron nitride, silicon carbide, ball-aluminium oxide, zinc oxide, silicon nitride, dispersion
Agent, anti-settling agent, diluent；Wherein, conductive powder, dispersing agent, anti-settling agent, the mass ratio of diluent are as follows: 80-100:0.5-2.5:6-
11:40-70。
6. a kind of method for preparing the graphene water-based cooling coating as described in claim 2-5 is any, it is characterised in that: specific
Steps are as follows: by the graphene dispersing solution, conductive powder dispersion pulp, water-base resin, anti-settling agent, levelling agent, defoaming agent, promotor
15-40min is stirred under the revolving speed of 2000-4000rpm, is sufficiently mixed uniformly, host agent is obtained after filtering；By the host agent, water
Property curing agent, diluent mix in proportion, stir 15-40min under the revolving speed of 1000-3000rpm using high speed disperser, so
Filtering obtains the graphene water-based cooling coating afterwards.
7. the method for graphene water-based cooling coating according to claim 6, it is characterised in that: the graphene dispersing solution
Preparation method, the specific steps are as follows: powder required in graphene dispersing solution is added in container, dispersing agent and dilution is added
Agent disperses 15-45min using ultrasonic wave, obtains stable graphene dispersing solution；Required powder is in the graphene dispersing solution
The group of graphene and one or more of carbon nanotube, nano carbon black, Nano diamond, nano carbon microsphere nano-carbon material
It closes；Wherein: according to mass ratio, graphene: nano-carbon material: dispersing agent: water=5-12:1-10:0.5-3:150-300.
8. the method for graphene water-based cooling coating according to claim 6, it is characterised in that: the conductive powder dispersion pulp
Preparation method, the specific steps are as follows: powder required in conductive powder dispersion pulp is added in container, dispersing agent, anti-settling is added
Agent, diluent are sanded dispersion machine using high speed and are dispersed with stirring 20-50min, revolving speed 2000-5000rpm；The conductive powder point
Dissipate one or more kinds of powders that required powder in slurry is boron nitride, silicon carbide, ball-aluminium oxide, zinc oxide, silicon nitride
Combination；Wherein, according to mass ratio, boron nitride, silicon carbide, ball-aluminium oxide, zinc oxide, silicon nitride one or more kinds of powder
The combination of body: dispersing agent: anti-settling agent: diluent=80-100:0.5-2.5:6-11:40-70.
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| CN201910192960.5A CN109988484A (en) | 2019-03-14 | 2019-03-14 | A kind of graphene water-based cooling coating and preparation method thereof |
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| CN201910192960.5A CN109988484A (en) | 2019-03-14 | 2019-03-14 | A kind of graphene water-based cooling coating and preparation method thereof |
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| CN201910192960.5A Pending CN109988484A (en) | 2019-03-14 | 2019-03-14 | A kind of graphene water-based cooling coating and preparation method thereof |
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| WO2024119219A1 (en) * | 2022-12-05 | 2024-06-13 | Graphene Manufacturing Group Ltd | Graphene heat transfer |
| CN116004080A (en) * | 2022-12-21 | 2023-04-25 | 广东仕诚塑料机械有限公司 | Main cooling roller heat-conducting coating, preparation method thereof and casting equipment |
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Application publication date: 20190709 |