CN111423815A - Graphene heat-conducting anticorrosive paint and preparation method thereof - Google Patents
Graphene heat-conducting anticorrosive paint and preparation method thereof Download PDFInfo
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- 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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
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- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/04—Condensation polymers of aldehydes or ketones with phenols only
- C09D161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
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- 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
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- 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
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
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- 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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/327—Aluminium phosphate
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- 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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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention provides a graphene heat-conducting anticorrosive coating and a preparation method thereof, wherein the graphene heat-conducting anticorrosive coating comprises, by taking the total weight of the graphene heat-conducting anticorrosive coating as a reference, 20-40% of resin, 30-60% of heat-conducting filler, 1-20% of graphene, 1-10% of dispersant and 20-40% of dispersion medium. According to the invention, the coating with excellent thermal conductivity and corrosion resistance is obtained by optimizing the ratio of the graphene to the thermal conductive filler and adopting a specific dispersion process and a dispersing agent, so that the energy loss can be reduced, and the thermal conductive efficiency is improved. The preparation method of the graphene heat-conducting anticorrosive coating is simple in process, low in cost and beneficial to industrial popularization.
Description
Technical Field
The invention relates to the technical field of coatings, and particularly relates to a graphene heat-conducting anticorrosive coating and a preparation method thereof.
Background
The gas water heater uses gas as fuel, and transfers heat to cold water in a heat exchanger by combustion heating so as to achieve the purpose of heating water. Most of the common heat exchangers are made of pure copper. In the actual use process, the pure copper on the inner wall of the heat exchanger often generates corrosion phenomena due to poor water quality, a long-time temperature environment close to 100 ℃ and the like, so that the water leakage of the heat exchanger is caused, and the service life of the heat exchanger is seriously influenced. The heat-conducting anticorrosive paint is one of the best ways to solve the problem, can enhance the anticorrosive performance of the heat exchanger, and can also improve the heat-conducting efficiency of the heat exchanger, thereby greatly prolonging the service life of the heat exchanger.
The graphene has excellent heat conduction performance, the heat conduction coefficient of the defect-free single-layer graphene can reach 5300W/mK, and the graphene is a carbon material with the highest heat conduction coefficient. Since 2004, graphene has attracted much attention as a novel two-dimensional nanomaterial. The graphene has excellent thermal properties, can play a key role in the coating, obviously improves the overall heat conduction effect of the coating, and improves the heat conduction efficiency of the coating. Meanwhile, the good comprehensive performance of the graphene can also enhance the shielding effect of the coating, so that the anticorrosion effect of the coating is increased.
The graphene is kept uniformly dispersed and stably stored in the graphene heat-conducting anticorrosive paint. Therefore, a proper dispersing agent and a proper dispersing process are needed to be adopted, so that the graphene, the heat-conducting filler and other components in the coating are optimally matched, the high heat-conducting efficiency and the high corrosion resistance of the coating are realized, and the service life of the heat exchanger is greatly prolonged.
It is noted that the information disclosed in the foregoing background section is only for enhancement of background understanding of the invention and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
The main purpose of the present invention is to overcome at least one of the above drawbacks of the prior art, and to provide a graphene thermal conductive anticorrosive coating and a preparation method thereof, so as to achieve high thermal conductivity and high corrosion resistance of the coating, thereby greatly prolonging the service life of the heat exchanger.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a graphene heat-conducting anticorrosive coating, which takes the total weight of the graphene heat-conducting anticorrosive coating as a reference and comprises the following components: 20 to 40 percent of resin, 30 to 60 percent of heat conducting filler, 1 to 20 percent of graphene, 1 to 10 percent of dispersant and 20 to 40 percent of dispersion medium.
According to one embodiment of the present invention, the resin is selected from one or more of acrylic resin, silicone resin, polyurethane resin, amino resin, epoxy resin, and phenolic resin; the heat conducting filler is selected from one or more of conductive graphite, silicon carbide, boron nitride and aluminum tripolyphosphate.
According to an embodiment of the present invention, the graphene has a diameter of 5 to 40 μm.
According to one embodiment of the invention, the dispersing agent is selected from one or more of hydroxymethylcellulose, polyvinylpyrrolidone, sodium polyacrylate, polyacrylic acid polymer and high molecular copolymer.
According to one embodiment of the invention, the dispersion medium is selected from one or more of propylene glycol, isopropanol, n-butanol and ethanol.
The invention also provides a preparation method of the graphene heat-conducting anticorrosive paint, which comprises the following steps: placing graphene and a dispersing agent in a dispersion medium for primary mixing to obtain a graphene dispersion liquid; carrying out secondary mixing on the resin and the heat-conducting filler to obtain a mixed material; and adding the graphene dispersion liquid into the mixture material, and mixing for three times to obtain the graphene heat-conducting anticorrosive coating.
According to one embodiment of the invention, the primary mixing comprises: placing the dispersing agent in a dispersing medium for primary stirring; adding graphene into the solution after primary stirring, and sequentially performing secondary stirring and grinding to obtain a graphene dispersion liquid; wherein the speed of the secondary stirring is greater than that of the primary stirring, and the grinding is selected from one or more of sand grinding, ball milling and three-roll grinding.
According to one embodiment of the invention, the speed of one stirring is 600rad/min to 800rad/min, and the time of one stirring is 20min to 40 min; the secondary stirring speed is 1000 rad/min-1200 rad/min, and the secondary stirring time is 20 min-40 min; the grinding time is 40 min-80 min.
According to one embodiment of the invention, the secondary mixing comprises: adding a heat-conducting filler into the resin, and stirring for 20-40 min at 1100-1300 rad/min to obtain a mixed material.
According to one embodiment of the invention, the tertiary mixing comprises: adding the graphene dispersion liquid into the mixture, stirring for 20-40 min at 1200-1400 rad/min, and then grinding for 30-60 min at 1300-1500 rad/min to obtain the graphene heat-conducting anticorrosive coating; wherein the grinding is selected from one or more of sand grinding, ball milling and three-roll grinding.
According to the technical scheme, the invention has the beneficial effects that:
according to the graphene heat-conducting anticorrosive coating provided by the invention, the coating with excellent heat conductivity and anticorrosive performance is obtained by optimizing the ratio of graphene to heat-conducting filler and adopting a specific dispersing process and a dispersing agent. The corrosion resistance of the coating is improved by utilizing the shielding effect and excellent comprehensive performance of the graphene; meanwhile, the coating prepared from the graphene heat-conducting anticorrosive coating has a high heat conductivity coefficient by utilizing the mutual matching of the heat conduction effects of the graphene and the heat-conducting filler, so that the energy loss is reduced, and the heat conduction efficiency is improved. The preparation method of the graphene heat-conducting anticorrosive coating provided by the invention is simple in process, low in cost and beneficial to industrial popularization.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a flow chart of a preparation process of a graphene thermal conductive anticorrosive coating according to an embodiment of the present invention;
fig. 2 is a Scanning Electron Microscope (SEM) image of graphene of example 1;
fig. 3 is a raman spectrum of graphene of example 1.
Detailed Description
The following presents various embodiments or examples in order to enable those skilled in the art to practice the invention with reference to the description herein. These are, of course, merely examples and are not intended to limit the invention. The endpoints of the ranges and any values disclosed in the present application are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to yield one or more new ranges of values, which ranges of values should be considered as specifically disclosed herein.
The invention provides a graphene heat-conducting anticorrosive coating, which takes the total weight of the graphene heat-conducting anticorrosive coating as a reference and comprises the following components: 20 to 40 percent of resin, 30 to 60 percent of heat conducting filler, 1 to 20 percent of graphene, 1 to 10 percent of dispersant and 20 to 40 percent of dispersion medium.
According to the invention, as for the heat exchanger, the heat-conducting anticorrosive paint is adopted on the inner wall, so that not only can the anticorrosive performance of the heat exchanger be enhanced, but also the heat-conducting efficiency of the heat exchanger can be improved, and the service life of the heat exchanger is greatly prolonged. The inventor of the invention finds that the graphene heat-conducting anticorrosive paint capable of being uniformly dispersed and stably stored can be obtained by adding graphene into the paint, optimizing the ratio of the graphene to the heat-conducting filler and adopting a specific dispersing process and a dispersing agent. The coating improves the corrosion resistance by utilizing the shielding effect and excellent comprehensive performance of the graphene; meanwhile, the coating prepared from the graphene heat-conducting anticorrosive coating has a high heat conductivity coefficient by utilizing the mutual transmission, mutual matching and mutual supplement of the heat conduction effects of the graphene and the heat-conducting filler, so that the energy loss is reduced, and the heat conduction efficiency is improved. The comprehensive cooperation is realized, the base material has good heat conduction efficiency and high anticorrosion efficiency under the protection of the graphene heat conduction anticorrosion coating, and the service life of the base material can be greatly prolonged.
In some embodiments, the graphene thermal conductive anticorrosive coating preferably contains 25% to 35% of resin by weight, for example, 25%, 26%, 30%, 32%, 33%, 35%, and the like; the content of the heat-conducting filler is 30 to 40 percent, such as 30 percent, 32 percent, 36 percent, 39 percent, 40 percent and the like; the graphene content is 2% to 5%, for example, 2%, 3%, 4%, etc.; the dispersant content is 5% to 10%, for example, 5%, 7%, 8%, etc.; the content of the dispersion medium is 20% to 30%, for example, 23%, 26%, 27%, etc.; .
Wherein, the resin is selected from one or more of acrylic resin, organic silicon resin, polyurethane resin, amino resin, epoxy resin and phenolic resin; the heat conducting filler is selected from one or more of conductive graphite, silicon carbide, boron nitride and aluminum tripolyphosphate.
The structure of the graphene is not limited, and the graphene can be graphene quantum dots, graphene nanosheets, graphene nanoribbons, graphene films, few-layer graphene and multi-layer graphene. The thickness of the graphene is less than or equal to 10nm, the graphene material can be prepared by a physical stripping method, and the diameter of the graphene is 5-40 μm.
The invention makes specific selection of a dispersing agent and a dispersing medium, wherein the dispersing agent is selected from one or more of hydroxymethyl cellulose, polyvinylpyrrolidone, sodium polyacrylate, polyurethane modified acrylic acid, polyacrylic acid polymer and sodium polycarboxylate. The dispersion medium is selected from one or more of propylene glycol, isopropanol, n-butanol and ethanol. The dispersing agent is uniformly mixed in a dispersing medium, then graphene is added for specific dispersion, stable and uniform graphene dispersion liquid can be obtained, and then the graphene dispersion liquid is utilized to prepare the corresponding graphene heat-conducting anticorrosive paint.
The preparation method of the graphene heat-conducting anticorrosive coating of the invention is specifically explained below, and fig. 1 shows a flow chart of the preparation process of the graphene heat-conducting anticorrosive coating of the invention. As shown in fig. 1, the method includes: placing graphene and a dispersing agent in a dispersion medium for primary mixing to obtain a graphene dispersion liquid; carrying out secondary mixing on the resin and the heat-conducting filler to obtain a mixed material; and adding the graphene dispersion liquid into the mixture material, and mixing for three times to obtain the graphene heat-conducting anticorrosive coating.
Firstly, placing graphene and a dispersing agent in a dispersion medium for primary mixing to obtain a graphene dispersion liquid. Wherein the primary mixing comprises:
and placing the dispersing agent into a dispersing medium for primary stirring, and then adding graphene into the solution after primary stirring for secondary stirring and grinding in sequence to obtain the graphene dispersion liquid. Wherein the speed of the secondary stirring is greater than that of the primary stirring, and the grinding is selected from one or more of sand grinding, ball milling and three-roll grinding.
In some embodiments, the speed of one agitation is 600rad/min to 800rad/min, such as 600rad/min, 650rad/min, 680rad/min, 700rad/min, 720rad/min, 800rad/min, and the like; the time of primary stirring is 20min to 40min, such as 20min, 22min, 25min, 30min, 35min, 37min, 40min and the like; the secondary stirring speed is 1000 rad/min-1200 rad/min, such as 1000rad/min, 1030rad/min, 1080rad/min, 1100rad/min, 1150rad/min, 1190rad/min, 1200rad/min, etc.; the time of the secondary stirring is 20min to 40min, such as 20min, 23min, 29min, 30min, 36min, 38min, 40min and the like; the grinding time is 40 min-80 min, such as 40min, 43min, 46min, 50min, 56min, 60min, 70min, etc. Preferably, the grinding is by sanding.
And then, carrying out secondary mixing on the resin and the heat-conducting filler to obtain a mixed material. It should be noted that the mixed material of the resin and the heat conductive filler may be prepared first, and then the graphene dispersion may be prepared, which is not limited to the above preparation sequence.
The secondary mixing process comprises the following steps: adding a heat-conducting filler into the resin, stirring at the speed of 1100 rad/min-1300 rad/min, such as 1100rad/min, 1170rad/min, 1190rad/min, 1200rad/min, 1230rad/min, 1250rad/min, 1280rad/min and the like for 20 min-40 min, such as 20min, 23min, 29min, 30min, 36min, 38min, 40min and the like, so that the heat-conducting filler is uniformly dispersed in the resin, and preparing the obtained mixture for further adding the graphene dispersion liquid.
Finally, adding the graphene dispersion liquid into the obtained mixture, stirring at the speed of 1200rad/min to 1400rad/min, such as 1200rad/min, 1230rad/min, 1256rad/min, 1360rad/min, 1390rad/min, 1400rad/min, for 20min to 40min, such as 20min, 21min, 24min, 32min, 37min, 38min, 40min, and the like, and then grinding at the speed of 1300rad/min to 1500rad/min, such as 1300rad/min, 1310rad/min, 1420rad/min, 1440rad/min, 1490rad/min, 1500rad/min, and the like, for 30min to 60min, such as 30min, 35min, 40min, 42min, 45min, 50min, 60min, and the like, so as to obtain the graphene heat-conducting anticorrosive paint; wherein the grinding is selected from one or more of sand grinding, ball milling and three-roll grinding. Of course, the mixing and dispersion may be performed by a method such as high-speed ball milling, and the present invention is not limited thereto.
In conclusion, the graphene heat-conducting anticorrosive coating provided by the invention is prepared by optimizing the ratio of graphene to heat-conducting filler and adopting a specific dispersion process in a dispersion medium. The corrosion resistance of the coating is improved by utilizing the shielding effect and excellent comprehensive performance of the graphene; meanwhile, the coating prepared from the graphene heat-conducting anticorrosive coating has a high heat conductivity coefficient by utilizing the mutual matching of the heat conduction effects of the graphene and the heat-conducting filler, so that the energy loss is reduced, and the heat conduction efficiency is improved. The preparation method of the graphene heat-conducting anticorrosive coating provided by the invention is simple in process, low in cost and beneficial to industrial popularization.
The invention will be further illustrated by the following examples, but is not to be construed as being limited thereto. Unless otherwise specified, reagents, materials and the like used in the present invention are commercially available.
Example 1
1) 6g of polyvinylpyrrolidone and 4g of hydroxymethyl cellulose are added into 25g of propylene glycol, stirred at a high speed of 700rad/min for 20min, added with 2g of graphene (Honna, Dongguan), stirred at a high speed of 1000rad/min for 20min and sanded for 60min to obtain the graphene dispersion liquid.
FIG. 2 shows a Scanning Electron Microscope (SEM) image of the graphene of example 1, from FIG. 2, the diameter of the graphene is in the range of 5 μm to 40 μm; fig. 3 shows a raman spectrum of the graphene of example 1, and as can be seen from fig. 3, the graphene has a very weak D peak, a very strong G peak, and a strong 2D peak, indicating that the graphene has fewer defects and fewer layers.
2) 30g of organic silicon resin (Dongguan, Glubane nanomaterial Co., Ltd., GR-5001) was added to a vessel, 20g of conductive graphite, 8g of silicon carbide, and 5g of boron nitride were added, and stirred at a high speed of 1200rad/min for 30min to obtain a mixture.
3) Mixing the graphene dispersion liquid obtained in the step 1) and the mixture obtained in the step 2), stirring at a high speed of 1300rad/min for 40min, and grinding with three rollers for 60min to obtain the graphene heat-conducting anticorrosive coating.
Example 2
1) Adding 4g of polyvinylpyrrolidone, 3g of sodium polyacrylate and 3g of hydroxymethyl cellulose into 20g of isopropanol, stirring at a high speed of 600rad/min for 20min, adding 5g of graphene, stirring at a high speed of 1000rad/min for 30min, and sanding for 60min to obtain the graphene dispersion. The graphene used therein was the graphene of example 1.
2) 35g of acrylic resin (Pasf, 7538) was charged into a vessel, 15g of conductive graphite, 8g of silicon carbide, and 7g of aluminum tripolyphosphate were added, and the mixture was stirred at 1200rad/min at high speed for 30min to obtain a mixture.
3) Mixing the graphene dispersion liquid obtained in the step 1) with the mixture obtained in the step 2), and stirring at a high speed of 1350rad/min for 100min to obtain the graphene heat-conducting anticorrosive coating.
Example 3
1) 10g of polyurethane modified acrylic acid dispersant (SUP 1400, Shanghai Ded trade Co., Ltd.) was added to 30g of n-butanol, stirred at high speed at 800rad/min for 20min, 10g of graphene was added, stirred at high speed at 1000rad/min for 40min, and sanded for 60min to obtain a graphene dispersion. The graphene used therein was the graphene of example 1.
2) 30g of phenolic resin (F-51, Shandongdyuan epoxy technology Co., Ltd.) was put in a vessel, 15g of conductive graphite and 5g of silicon carbide were added, and the mixture was stirred at 1200rad/min at a high speed for 30min to obtain a mixture.
3) Mixing the graphene dispersion liquid obtained in the step 1) with the mixture obtained in the step 2), and stirring at a high speed of 1250rad/min for 40min, and performing ball milling at 1350rad/min for 60min to obtain the graphene heat-conducting anticorrosive coating.
Comparative example 1
The graphene thermal conductive anticorrosive coating is prepared by the method of example 1, except that sanding is not performed in step 1).
Comparative example 2
The graphene heat-conducting anticorrosive coating is prepared by the method of example 1, except that in the step 3), the high-speed stirring speed is 1000 rad/min.
Test example
The graphene heat-conducting anticorrosive coatings obtained in examples 1 to 3 and comparative examples 1 to 2 and the commercially available heat exchanger inner wall anticorrosive coatings (which mainly comprise organic silicon resin, heat-conducting filler, organic solvent and the like and do not contain graphene) were subjected to corrosion resistance, heat resistance, water resistance and mechanical property tests. Specifically, the obtained graphene heat-conducting anticorrosive coating is coated on a test-grade copper plate with the thickness of 150 × 70 × 0.8mm by using a 100 μm wire bar coater, and after complete curing, the graphene heat-conducting anticorrosive coating is obtained.
The main performance parameters of the coatings obtained by the tests are shown in table 1.
TABLE 1
As can be seen from Table 1, compared with a coating prepared from a commercially available anticorrosive coating, the graphene heat-conducting anticorrosive coating prepared by the method disclosed by the invention has better mechanical property, heat resistance, water resistance and anticorrosive property, and simultaneously has excellent heat conductivity, so that a base material covered with the coating has better heat-conducting efficiency.
It should be noted by those skilled in the art that the described embodiments of the present invention are merely exemplary and that various other substitutions, alterations, and modifications may be made within the scope of the present invention. Accordingly, the present invention is not limited to the above-described embodiments, but is only limited by the claims.
Claims (10)
1. The graphene heat-conducting anticorrosive paint is characterized by comprising the following components by taking the total weight of the graphene heat-conducting anticorrosive paint as a reference: 20 to 40 percent of resin, 30 to 60 percent of heat conducting filler, 1 to 20 percent of graphene, 1 to 10 percent of dispersant and 20 to 40 percent of dispersion medium.
2. The graphene thermal conductive anticorrosive paint according to claim 1, wherein the resin is one or more selected from acrylic resin, silicone resin, polyurethane resin, amino resin, epoxy resin and phenolic resin; the heat conducting filler is selected from one or more of conductive graphite, silicon carbide, boron nitride and aluminum tripolyphosphate.
3. The graphene thermal conduction anticorrosive paint according to claim 1, wherein the diameter of the graphene is 5-40 μm.
4. The graphene thermal conduction anticorrosive coating according to claim 1, wherein the dispersant is selected from one or more of hydroxymethyl cellulose, polyvinylpyrrolidone, sodium polyacrylate, polyurethane modified acrylic acid, polyacrylic acid polymer and sodium polycarboxylate.
5. The graphene thermal conductive anticorrosive paint according to claim 1, wherein the dispersion medium is one or more selected from propylene glycol, isopropanol, n-butanol and ethanol.
6. The preparation method of the graphene heat-conducting anticorrosive paint as claimed in any one of claims 1 to 5, characterized by comprising the following steps:
placing graphene and a dispersing agent in a dispersion medium for primary mixing to obtain a graphene dispersion liquid;
carrying out secondary mixing on the resin and the heat-conducting filler to obtain a mixed material; and
and adding the graphene dispersion liquid into the mixed material, and mixing for three times to obtain the graphene heat-conducting anticorrosive coating.
7. The method of manufacturing according to claim 6, wherein the primary mixing includes:
placing the dispersing agent in the dispersing medium for primary stirring;
adding the graphene into the solution after primary stirring, and sequentially performing secondary stirring and grinding to obtain the graphene dispersion liquid; and
wherein the speed of the secondary stirring is greater than the speed of the primary stirring, and the grinding is selected from one or more of sand grinding, ball milling and three-roll grinding.
8. The method according to claim 7, wherein the one-time stirring speed is 600rad/min to 800rad/min, and the one-time stirring time is 20min to 40 min; the secondary stirring speed is 1000rad/min to 1200rad/min, and the secondary stirring time is 20min to 40 min; the grinding time is 40-80 min.
9. The method of claim 6, wherein the secondary mixing comprises: adding the heat-conducting filler into the resin, and stirring for 20-40 min at 1100-1300 rad/min to obtain the mixed material.
10. The method of claim 6, wherein the three mixing includes: adding the graphene dispersion liquid into the mixed material, stirring for 20-40 min at 1200-1400 rad/min, and then grinding for 30-60 min at 1300-1500 rad/min to obtain the graphene heat-conducting anticorrosive coating; wherein the grinding is selected from one or more of sand grinding, ball milling and three-roll grinding.
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| CN202010424104.0A Pending CN111423815A (en) | 2020-05-19 | 2020-05-19 | Graphene heat-conducting anticorrosive paint and preparation method thereof |
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