CN110305559A - Corrosion-resistant heat-conducting coating and preparation method thereof - Google Patents
Corrosion-resistant heat-conducting coating and preparation method thereof Download PDFInfo
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- CN110305559A CN110305559A CN201910621761.1A CN201910621761A CN110305559A CN 110305559 A CN110305559 A CN 110305559A CN 201910621761 A CN201910621761 A CN 201910621761A CN 110305559 A CN110305559 A CN 110305559A
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- boron nitride
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- resistant heat
- conductive coating
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- 239000011248 coating agent Substances 0.000 title claims abstract description 57
- 238000005260 corrosion Methods 0.000 title claims abstract description 42
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- 238000002360 preparation method Methods 0.000 title claims abstract description 12
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- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical class N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 47
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- 238000006243 chemical reaction Methods 0.000 claims description 34
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- 239000006210 lotion Substances 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
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- 240000007594 Oryza sativa Species 0.000 claims 1
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- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 1
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- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
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- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a corrosion-resistant heat-conducting coating and a preparation method thereof, wherein the coating comprises the following components, by weight, 100 ~ 120 parts of aqueous film-forming resin, 30 ~ 40 parts of curing agent, 0.3 ~ 0.6.6 parts of flatting agent, 0.2 ~ 0.4.4 parts of defoaming agent, 10 ~ 20 parts of carboxylic acid modified boron nitride, 0.5 ~ 1.5.5 parts of fluorinated graphene oxide and 50 ~ 80 parts of diluent.
Description
Technical field
The present invention relates to heat-conductive coating technical fields, in particular to a kind of corrosion resistant heat-conductive coating and its preparation side
Method.
Background technique
Heat conducting coating is intended to improve the radiating efficiency on coated article surface, reduces the internal temperature of system.Currently, common leads
Hot coating is mainly using macromolecule as film forming matter, and the filler for being subject to high-termal conductivity carrys out the capacity of heat transmission of strengthened coat, to reach
To the purpose of radiating and cooling.In use process, there are probelem in two aspects: first is that film forming agent is mostly oleoresin, solvent is generally adopted
With the toxic solvent such as such as toluene, dimethylbenzene, methylene chloride, high risks are caused to human health and environment；Second is that radiator
Accumulation of heat can be caused in portion when in use, accelerate the aging of organic thermal dispersant coatings, therefore heat conducting coating not only needs
With by system internal heat derived ability in time, the corrosion resistance for having certain is also needed, thus environment-friendly type high thermal conductivity is resistance to
The exploitation of erosion resisting coating has become the developing direction of the research field.
Hexagonal boron nitride (h-BN) is the isoelectronic species of graphite, is had and layer structure as graphite-like, referred to as " white
Graphite ".Other than having the excellent lubricity of similar graphite, mechanical performance and thermal conductivity, h-BN is also equipped with many unique property
Can, such as good insulating (band gap width 5.2-5.8eV), thermal stability height (using temperature up to 2800 DEG C in nitrogen atmosphere)
And not oxidizable (oxidizing temperature is higher than 800 DEG C), radiation hardness and good biocompatibility.In recent years, it with h-BN nanotube or receives
Rice piece causes extensive concern as the research of thermal property and flame-resistant insulation that filler improves polymeric matrix.
Zhou Wenying etc. is using epoxy resin modified organosilicon as matrix, boron nitride and aluminium oxide mixed fillers as thermally conductive grain
Thermostable heat-conductive insulated type adhesive coating is made in son, and heating conduction is preferable, but since h-BN chemical property is stablized, surface lacks
Active group lacks strong interaction with most of organic molecules and polymer molecule interchain, thus in organic solvent and epoxy
Dispersibility in resin matrix is very poor.108753001 A of patent of invention CN disclose a kind of high-peeling strength heat conducting coating and its
Preparation method forms carbon fiber modifying hybrid resin AlN, BN, SiO2, diallyl bis-phenol, cashew nut oil, trimethylolpropane
Triacrylate and organic solvent etc., wherein organic solvent is dimethylbenzene, n-butanol, acetone, ethyl acetate or tetrahydrofuran
One or more, the mechanical property and heating conduction of the invention coating are more excellent, but preparation process is complex and not environmentally property.Hair
Bright 105385334 A of patent CN discloses a kind of preparation method of transparent heat conducting coating of double-component waterborne polyurethane, forms water
Property dispersions of polyurethanes be component A, water-based polyurethane curing agent is B component, aluminium oxide and graphite oxide as heat filling, with
And other auxiliary agents.By terminal hydroxy group organic siliconresin modified aqueous polyurethane, synthesis obtains hardness, weatherability, water-fast for the invention
Property and all preferable aqueous double-component polyurethane of wearability, but there are inorganic filler particle dispersibility is bad, adhesive force is not good enough
The shortcomings that.Patent of invention CN201810088733.3 discloses a kind of preparation method of high thermal conductivity coating, is shelled first using solvent
From method prepare the isopropanol dispersion liquid of boron nitride nanosheet, then using it as reaction system, silane coupling agent and titanium is added dropwise
Sour four butyl esters, the hydrolysis rate of butyl titanate is effectively controlled under the action of with water nitrogen, finally carries out high-temperature process, to make
Boron nitride nanosheet/nano oxidized titanium composite material is obtained, high thermal conductivity paint stability obtained is good, good heat conductivity, but corrosion resistant
Corrosion is bad.
Summary of the invention
In view of the above shortcomings of the prior art, the object of the present invention is to provide a kind of corrosion resistant heat-conductive coating, solutions
Certainly existing heat-conductive coating there are the poor dispersion of filler boron nitride, coating adhesion is not good enough, poor corrosion resistance, and use
The problem of easy volatile solvent.
In order to solve the above-mentioned technical problem, present invention employs the following technical solutions: a kind of corrosion resistant heat-conductive coating,
It comprises the following components in parts by weight: 100 ~ 120 parts of aqueous film-forming resin, 30 ~ 40 parts of curing agent, 0.3 ~ 0.6 part of levelling agent, defoaming
0.2 ~ 0.4 part of agent, 10 ~ 20 parts of carboxyl acid modified boron nitride, 0.5 ~ 1.5 part and 50 ~ 80 parts of diluent of Fluorinated graphene oxide.
Carboxyl acid modified boron nitride is the compound that carboxylic acid phthalocyanine modification hydroxyl boron nitride is formed, in this way, on the one hand realizing
It is modified to the active function groups of hexagonal nanometer boron nitride particle, increase its dispersibility and chemical activity, makes carboxyl acid modified nitridation
Boron can be evenly dispersed in film-forming resin；On the other hand the pi-conjugated structure of the big ring of plane of the carboxylic acid phthalocyanine in the compound
Pi-pi accumulation structure can be formed with boron nitride, the barrier property of coating can be increased substantially, it is logical to extend corrosive medium diffusion
Road, and then form good anti-corrosion system；Again by compounding fluorinated graphene, since fluorinated graphene not only has goodization
Stability and thermal conductivity are learned, and its surface free energy is low, further increases the thermal conductivity and corrosion resisting property of coating.Another party
Face, carboxyl acid modified boron nitride and fluorinated graphene all have pi-conjugated structure, and when the two is scattered in resin, pi-pi accumulation effect occurs
Metastable structure is formed, so as to avoid the sedimentation of fluorinated graphene.
Preferably, the aqueous film-forming resin is aqueous epoxy resin emulsion or water-based acrylic resin lotion, glue
Degree is less than 50Pa s, solid content 38 ~ 42%, and pH is 7 ~ 9；The curing agent is the water-based emulsion of aromatic amine epoxy curing agent, viscosity
Less than 10Pa s, solid content 40%, pH is 11 ~ 13.
Preferably, the diluent is deionized water；The levelling agent is Efka3570 or Efka3580；It is described to disappear
Infusion is Efka2560, Efka2570 or Efka2580.
Preferably, the fluorine carbon ratio of the fluorinated graphene is 0.8 ~ 1.1, partial size is 4 ~ 10 μm.
Preferably, the carboxyl acid modified boron nitride is prepared using following methods:
1) hexagonal boron nitride micro-nano rice flour is added in the reaction kettle equipped with hydrogen peroxide, after ultrasonic disperse, the reaction kettle is set
24 ~ 48h is reacted in 100 DEG C of water-baths, 10 ~ 20min of every 2 ~ 3h ultrasound in reaction process after reaction evaporates solvent, and
It is washed with deionized solid 2 ~ 5 times, is dried in vacuo, obtains hydroxyl boron nitride；
2) deionized water will be added in hydroxyl boron nitride that step 1) obtains, 2 ~ 5h of ultrasonic disperse adds the continuation of carboxylic acid phthalocyanine
1 ~ 2h of ultrasound is then heated to 70 ~ 90 DEG C of 4 ~ 5h of reaction, room temperature is down to vigorous stirring, through centrifugation, washing and drying
Afterwards to get arrive the carboxyl acid modified boron nitride.
Preferably, the partial size of the boron nitride micro-nano rice flour, less than 20 microns, the concentration of hydrogen peroxide is 30%；It is described
The mass ratio of boron nitride and hydrogen peroxide is 1: 50 ~ 150.
Preferably, the hydroxyl boron nitride and the mass ratio of deionized water are 1: 200 ~ 500.
Preferably, the carboxylic acid phthalocyanine is tetrabasic carboxylic acid Phthalocyanine Zinc, tetrabasic carboxylic acid Cobalt Phthalocyanine or tetrabasic carboxylic acid FePC；It is described
The mass ratio of hydroxyl boron nitride and carboxylic acid phthalocyanine is 1: 1 ~ 1.5.
The present invention also provides the coatings formed by above-mentioned corrosion resistant heat-conductive coating.
The present invention also provides the preparation methods of above-mentioned corrosion resistant heat-conductive coating, comprising the following steps: claims according to formula
Raw material is taken, then by aqueous film-forming resin, carboxyl acid modified boron nitride, Fluorinated graphene oxide, diluent, levelling agent and defoaming agent
It is fully dispersed after mixing, mixed solution is filtered to obtain, then will be added in the curing agent addition mixed solution and be sufficiently mixed to get arriving
Corrosion resistant heat-conductive coating.
Compared with prior art, the invention has the following beneficial effects:
1, the present invention increases the heating conduction of coating and resistance to using carboxyl acid modified boron nitride and the collaboration of fluorinated graphene mixed fillers
Corrosion energy makes the coating with good thermal conductivity, wearability, corrosion resistance and adhesive force, while passing through carboxyl acid modified nitrogen
Change the pi-pi accumulation effect between boron and fluorographite ene compound, promotes the two to be uniformly dispersed in aqueous film-forming resin, no group
It is poly-, without sedimentation, solve existing heat-conductive coating there are corrosion resistances bad, adhesive force is not good enough and the poor dispersion of boron nitride
Problem can be widely applied in the fields such as chemical industry, petroleum, electric power, traffic and space flight, expand its application range.
2, the present invention is successively modified hexagonal boron nitride using carboxylic acid phthalocyanine and hydrogen peroxide as raw material, modified filler
There is good compatibility with coating matrix, the paint stability prepared by is good, and excellent in mechanical performance effectively improves coating
Heat dissipation performance；And the modified composite have pi-pi accumulation structure, increase its specific surface area, effectively raise coating with
The suction-operated of substrate, while the barrier property of coating can also be increased substantially, extend corrosive medium diffusion admittance, mentions significantly
The high corrosion resistance of coating.Again by compounding fluorinated graphene, the thermal conductivity and corrosion resisting property of coating are further increased,
And carboxyl acid modified boron nitride and fluorinated graphene occur pi-pi accumulation and act on forming metastable structure, keep its evenly dispersed
It is uneven so as to avoid the sedimentation of fluorinated graphene and the dispersion of boron nitride in resin.
3, the raw material that the present invention selects are simple and easy to get, and VOC free s volatilization, non-toxic solvent, safety and environmental protection is at low cost, system
Preparation Method is easy to operate easily-controllable, is easy to realize industrial production, and has a good application prospect.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail.
One, a kind of preparation method of corrosion resistant heat-conductive coating
Embodiment 1
A kind of corrosion resistant heat-conductive coating comprises the following components in parts by weight: 100 parts of aqueous film-forming resin, 30 parts of curing agent, stream
0.4 part of flat agent, 0.2 part of defoaming agent, 10 parts of carboxyl acid modified boron nitride, 1.5 parts of Fluorinated graphene oxide and 50 parts of diluent.
1) reaction kettle for the hydrogen peroxide for being 30% equipped with concentration is added in the hexagonal boron nitride micro-nano rice flour by partial size less than 20 μm
In, make the mass ratio 1: 50 of boron nitride and hydrogen peroxide, after ultrasonic disperse 5min, the reaction kettle is placed in 100 DEG C of water-baths
Middle reaction 48h, every 3h ultrasound 15min in reaction process, after reaction evaporates solvent, and solid 3 is washed with deionized
Secondary, vacuum drying obtains hydroxyl boron nitride.
2) will be added deionized water in hydroxyl boron nitride that step 1) obtains, ultrasonic disperse 5h, add carboxylic acid phthalocyanine after
Continuous ultrasound 2h, wherein the mass ratio of hydroxyl boron nitride, deionized water and carboxylic acid phthalocyanine is 1: 200: 1, is then heated to 70 DEG C
5h is reacted, is down to room temperature (20 DEG C ~ 35 DEG C) with vigorous stirring, is changed after centrifugation, washing and drying to get to the carboxylic acid
Property boron nitride.
3) according to formula weigh aqueous epoxy resin emulsion (viscosity be less than 50Pa s, solid content 38 ~ 42%, pH be 7 ~ 9),
Carboxyl acid modified boron nitride, Fluorinated graphene oxide (fluorine carbon ratio is 0.8 ~ 1.1, and partial size is 4 ~ 10 μm), deionized water, Efka3570
It is fully dispersed after being mixed with Efka2560, mixed solution is filtered to obtain, then the water-based emulsion that aromatic amine epoxy curing agent is added is (viscous
Degree is less than 10Pa s, solid content 40%, and pH is 11 ~ 13) it is added in the mixed solution to be sufficiently mixed and be led to get to corrosion resistant
Hot coating.
Embodiment 2
A kind of corrosion resistant heat-conductive coating comprises the following components in parts by weight: 110 parts of aqueous film-forming resin, 35 parts of curing agent, stream
0.3 part of flat agent, 0.3 part of defoaming agent, 15 parts of carboxyl acid modified boron nitride, 1.0 parts of Fluorinated graphene oxide and 60 parts of diluent.
1) reaction kettle for the hydrogen peroxide for being 30% equipped with concentration is added in the hexagonal boron nitride micro-nano rice flour by partial size less than 20 μm
In, make the mass ratio 1: 100 of boron nitride and hydrogen peroxide, after ultrasonic disperse 5min, the reaction kettle is placed in 100 DEG C of water-baths
Middle reaction 48h, every 3h ultrasound 15min in reaction process, after reaction evaporates solvent, and solid 3 is washed with deionized
Secondary, vacuum drying obtains hydroxyl boron nitride.
2) will be added deionized water in hydroxyl boron nitride that step 1) obtains, ultrasonic disperse 5h, add carboxylic acid phthalocyanine after
Continuous ultrasound 2h, wherein the mass ratio of hydroxyl boron nitride, deionized water and carboxylic acid phthalocyanine is 1: 300: 1.2, is then heated to
80 DEG C of reaction 5h are down to room temperature (20 DEG C ~ 35 DEG C) with vigorous stirring, arrive the carboxylic after centrifugation, washing and drying
The modified boron nitride of acid.
3) according to formula weigh aqueous epoxy resin emulsion (viscosity be less than 50Pa s, solid content 38 ~ 42%, pH be 7 ~ 9),
Carboxyl acid modified boron nitride, Fluorinated graphene oxide (fluorine carbon ratio is 0.8 ~ 1.1, and partial size is 4 ~ 10 μm), deionized water, Efka3580
It is fully dispersed after being mixed with Efka2570, mixed solution is filtered to obtain, then the water-based emulsion that aromatic amine epoxy curing agent is added is (viscous
Degree is less than 10Pa s, solid content 40%, and pH is 11 ~ 13) it is added in the mixed solution to be sufficiently mixed and be led to get to corrosion resistant
Hot coating.
Embodiment 3
A kind of corrosion resistant heat-conductive coating comprises the following components in parts by weight: 120 parts of aqueous film-forming resin, 40 parts of curing agent, stream
0.5 part of flat agent, 50.4 parts of defoaming agent, 20 parts of carboxyl acid modified boron nitride, 0.5 part of Fluorinated graphene oxide and 70 parts of diluent.
1) reaction kettle for the hydrogen peroxide for being 30% equipped with concentration is added in the hexagonal boron nitride micro-nano rice flour by partial size less than 20 μm
In, make the mass ratio 1: 150 of boron nitride and hydrogen peroxide, after ultrasonic disperse 5min, the reaction kettle is placed in 100 DEG C of water-baths
Middle reaction 48h, every 3h ultrasound 15min in reaction process, after reaction evaporates solvent, and solid 3 is washed with deionized
Secondary, vacuum drying obtains hydroxyl boron nitride.
2) will be added deionized water in hydroxyl boron nitride that step 1) obtains, ultrasonic disperse 5h, add carboxylic acid phthalocyanine after
Continuous ultrasound 2h, wherein the mass ratio of hydroxyl boron nitride, deionized water and carboxylic acid phthalocyanine is 1: 400: 1.4, is then heated to
90 DEG C of reaction 5h are down to room temperature (20 DEG C ~ 35 DEG C) with vigorous stirring, arrive the carboxylic after centrifugation, washing and drying
The modified boron nitride of acid.
3) according to formula weigh aqueous epoxy resin emulsion (viscosity be less than 50Pa s, solid content 38 ~ 42%, pH be 7 ~ 9),
Carboxyl acid modified boron nitride, Fluorinated graphene oxide (fluorine carbon ratio is 0.8 ~ 1.1, and partial size is 4 ~ 10 μm), deionized water, Efka3570
It is fully dispersed after being mixed with Efka2580, mixed solution is filtered to obtain, then the water-based emulsion that aromatic amine epoxy curing agent is added is (viscous
Degree is less than 10Pa s, solid content 40%, and pH is 11 ~ 13) it is added in the mixed solution to be sufficiently mixed and be led to get to corrosion resistant
Hot coating.
Embodiment 4
A kind of corrosion resistant heat-conductive coating comprises the following components in parts by weight: 110 parts of aqueous film-forming resin, 40 parts of curing agent, stream
0.6 part of flat agent, 0.4 part of defoaming agent, 20 parts of carboxyl acid modified boron nitride, 1.0 parts of Fluorinated graphene oxide and 80 parts of diluent.
1) reaction kettle for the hydrogen peroxide for being 30% equipped with concentration is added in the hexagonal boron nitride micro-nano rice flour by partial size less than 20 μm
In, make the mass ratio 1: 150 of boron nitride and hydrogen peroxide, after ultrasonic disperse 5min, the reaction kettle is placed in 100 DEG C of water-baths
Middle reaction 48h, every 3h ultrasound 15min in reaction process, after reaction evaporates solvent, and solid 3 is washed with deionized
Secondary, vacuum drying obtains hydroxyl boron nitride.
2) will be added deionized water in hydroxyl boron nitride that step 1) obtains, ultrasonic disperse 5h, add carboxylic acid phthalocyanine after
Continuous ultrasound 2h, wherein the mass ratio of hydroxyl boron nitride, deionized water and carboxylic acid phthalocyanine is 1: 500: 1.5, is then heated to
90 DEG C of reaction 5h are down to room temperature (20 DEG C ~ 35 DEG C) with vigorous stirring, arrive the carboxylic after centrifugation, washing and drying
The modified boron nitride of acid.
3) according to formula weigh aqueous epoxy resin emulsion (viscosity be less than 50Pa s, solid content 38 ~ 42%, pH be 7 ~ 9),
Carboxyl acid modified boron nitride, Fluorinated graphene oxide (fluorine carbon ratio is 0.8 ~ 1.1, and partial size is 4 ~ 10 μm), deionized water, Efka3580
It is fully dispersed after being mixed with Efka2580, mixed solution is filtered to obtain, then the water-based emulsion that aromatic amine epoxy curing agent is added is (viscous
Degree is less than 10Pa s, solid content 40%, and pH is 11 ~ 13) it is added in the mixed solution to be sufficiently mixed and be led to get to corrosion resistant
Hot coating.
Two, product testing
Performance verification is carried out to corrosion resistant heat-conductive coating prepared by embodiment 1 ~ 4, the results are shown in Table 1.
Table 1
| Sample | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Detection method |
| Appearance | Colourless transparent liquid | Light yellow transparent liquid | Colourless transparent liquid | Colourless transparent liquid | Range estimation |
| Solid content/% | 20 | 21 | 23 | 22 | GB/T 9761–1988 |
| Viscosity/s | 18 | 21 | 20 | 20 | GB/T 1723-1993 |
| Paint film appearance | Dark grey | Grey | White | Canescence | GB/T 9761–1988 |
| Film thickness/μm | 23 | 22 | 24 | 24 | GB/T1727-92 |
| Adhesive force/grade | 0 | 0 | 0 | 0 | GB/T 9286-1998 |
| Wearability/mg | 17 | 15 | 16 | 18 | GB/T1768-79(89) |
| Resistance to neutral salt spray/h | 1000 | 1000 | 1000 | 1000 | GB/T1771-1991 |
| Artificial ageing resistance performance/h | 3000 | 3000 | 3000 | 3000 | GB/T 1766-1995 |
| Thermal conductivity/Wm-1·K-1 | 0.519 | 0.649 | 0.778 | 0.859 | ANSI/ASTM D5470-2006 |
As can be seen from Table 1, coating prepared by the present invention is with good thermal conductivity, wearability, corrosion resistance and adhesive force,
And it avoids using the toxic solvent of volatility, safety and environmental protection, nonhazardous.Wherein, adhesive force can reach 0 grade, increase and base
The problems such as binding force of body material improves the workability of coating, avoids coating cracking, peels and fall.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not limitation with the present invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of corrosion resistant heat-conductive coating, which is characterized in that comprise the following components in parts by weight: aqueous film-forming resin 100 ~
120 parts, 30 ~ 40 parts of curing agent, 0.3 ~ 0.6 part of levelling agent, 0.2 ~ 0.4 part of defoaming agent, 10 ~ 20 parts of carboxyl acid modified boron nitride, fluorine
Change 0.5 ~ 1.5 part and 50 ~ 80 parts of diluent of graphene oxide.
2. corrosion resistant heat-conductive coating according to claim 1, which is characterized in that the aqueous film-forming resin is water-base epoxy
Resin emulsion or water-based acrylic resin lotion, viscosity are less than 50Pa s, solid content 38 ~ 42%, and pH is 7 ~ 9；The curing agent is
The water-based emulsion of aromatic amine epoxy curing agent, viscosity are less than 10Pa s, solid content 40%, and pH is 11 ~ 13.
3. corrosion resistant heat-conductive coating according to claim 1, which is characterized in that the diluent is deionized water；It is described
Levelling agent is Efka3570 or Efka3580；The defoaming agent is Efka2560, Efka2570 or Efka2580.
4. corrosion resistant heat-conductive coating according to claim 1, which is characterized in that the fluorine carbon ratio of the fluorinated graphene is
0.8 ~ 1.1, partial size is 4 ~ 10 μm.
5. corrosion resistant heat-conductive coating according to claim 1, which is characterized in that the carboxyl acid modified boron nitride is using following
Method is prepared:
1) hexagonal boron nitride micro-nano rice flour is added in the reaction kettle equipped with hydrogen peroxide, after ultrasonic disperse, the reaction kettle is set
24 ~ 48h is reacted in 95 ~ 110 DEG C of water-baths, 10 ~ 20min of every 2 ~ 3h ultrasound in reaction process after reaction evaporates solvent,
And be washed with deionized solid 2 ~ 5 times, it is dried in vacuo, obtains hydroxyl boron nitride；
2) deionized water will be added in hydroxyl boron nitride that step 1) obtains, 2 ~ 5h of ultrasonic disperse adds the continuation of carboxylic acid phthalocyanine
1 ~ 2h of ultrasound is then heated to 70 ~ 90 DEG C of 4 ~ 5h of reaction, room temperature is down to vigorous stirring, through centrifugation, washing and drying
Afterwards to get arrive the carboxyl acid modified boron nitride.
6. corrosion resistant heat-conductive coating according to claim 5, which is characterized in that the concentration of the hydrogen peroxide is 30%；It is described
The mass ratio of boron nitride and hydrogen peroxide is 1: 50 ~ 150.
7. corrosion resistant heat-conductive coating according to claim 5, which is characterized in that the hydroxyl boron nitride and deionized water
Mass ratio is 1: 200 ~ 500.
8. corrosion resistant heat-conductive coating according to claim 5, which is characterized in that the carboxylic acid phthalocyanine is tetrabasic carboxylic acid phthalocyanine
Zinc, tetrabasic carboxylic acid Cobalt Phthalocyanine or tetrabasic carboxylic acid FePC.
9. corrosion resistant heat-conductive coating according to claim 5, which is characterized in that the hydroxyl boron nitride and carboxylic acid phthalocyanine
Mass ratio is 1: 1 ~ 1.5.
10. a kind of preparation method of any one of such as claim 1 ~ 9 corrosion resistant heat-conductive coating, which is characterized in that including
Following steps: weighing raw material according to formula, then by aqueous film-forming resin, carboxyl acid modified boron nitride, Fluorinated graphene oxide, dilute
It releases fully dispersed after agent, levelling agent and defoaming agent mixing, filters to obtain mixed solution, then curing agent will be added that the mixing is added is molten
It is sufficiently mixed in liquid to get corrosion resistant heat-conductive coating is arrived.
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| CN115368766A (en) * | 2022-08-19 | 2022-11-22 | 佛山科学技术学院 | Fluorinated graphene/titanium dioxide composite anti-corrosion filler and preparation method thereof |
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| CN115368766A (en) * | 2022-08-19 | 2022-11-22 | 佛山科学技术学院 | Fluorinated graphene/titanium dioxide composite anti-corrosion filler and preparation method thereof |
| CN115368766B (en) * | 2022-08-19 | 2023-11-07 | 佛山科学技术学院 | Fluorinated graphene/titanium dioxide composite anti-corrosion filler and preparation method thereof |
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