CN112375460A - Graphene high-heat-dissipation anticorrosive paint for charging pile and preparation method thereof - Google Patents
Graphene high-heat-dissipation anticorrosive paint for charging pile and preparation method thereof Download PDFInfo
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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
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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Abstract
A graphene high-heat-dissipation anticorrosive coating for charging piles and a preparation method thereof relate to a high-molecular composite material, and the high-molecular composite material comprises epoxy resin, a modified heat-conducting graphene material, a heat-conducting filler, an anticorrosive filler, an auxiliary agent, a solvent and an epoxy curing agent. The graphene high-heat-dissipation anticorrosive coating for the charging pile provided by the invention has excellent heat dissipation performance and excellent corrosion protection performance. The modified heat-conducting graphene material and epoxy resin are utilized to form a space network heat-conducting polymer structure, so that the heat-conducting property of a film-forming matrix is improved, and the heat-radiating area of a coating is increased; meanwhile, the graphene covalent bond is introduced into the polymer to improve the graphene dispersibility, increase the heat conduction transmission channel, improve the interaction between the resin and the heat conduction filler and fully play the heat conduction effect of the heat conduction filler; and finally, the shielding property of the lamellar graphene material is combined with the anticorrosive filler, so that the anticorrosive property of the coating is ensured. Compared with the traditional coating, the coating has excellent corrosion resistance and better heat dissipation (the heat conductivity coefficient is more than or equal to 18W/mK), can timely guide out the heat inside the charging pile, and ensures the working efficiency and the service life of the charging pile at higher temperature.
Description
Technical Field
The invention relates to a high-molecular composite material, in particular to a graphene high-heat-dissipation anticorrosive paint for charging piles and a preparation method thereof.
Background
With the continuous increase of global energy demand and the continuous tightening of environmental policy and regulations, power battery vehicles are becoming popular. The charging performance of the charging pile of the electric automobile, which is used as an energy supply device of the electric automobile, is related to the service life and the charging time of a battery pack in the automobile, and is also a most concerned problem before the modern consumers buy the electric automobiles. The initial stage of electric vehicle charging stations in China is mostly limited to electric buses or internal group vehicles, next to the construction of the first centralized electric vehicle charging station in China in Beijing, the investment of Shanghai electric power companies for constructing the electric vehicle charging stations, the first batch of electric vehicle charging piles for the production of power grids in south, and the construction and operation of the national power grid companies for south Tangshan charging stations in south lake, the use of the charging piles is more and more extensive, and the problem of ensuring the stable operation of the charging piles in the external environment is the primary consideration in the construction of the charging piles.
Fill electric pile and lay in the open air mostly, suffer strong light irradiation throughout the year, easily lead to its inside heat gathering, operating temperature risees, has influenced the life who fills electric pile, and equipment operation safety can be threatened even to the serious. In addition, the charging pile mainly adopts a metal material, and needs to be subjected to rust prevention treatment on the surface of the charging pile, otherwise, the device is corroded and perforated, and therefore, the development of the high-efficiency heat-dissipation anticorrosive paint is a technical problem which needs to be solved urgently. As a novel two-dimensional lamellar carbon material, graphene has excellent shielding property and electric and heat conducting properties, and can provide an innovative idea for the development of heat dissipation anticorrosive coatings.
Chinese patent CN 111471361 a discloses a graphene heat dissipation coating, in which heat conductive fillers (aluminum oxide, silicon oxide, zinc oxide, aluminum nitride, boron nitride, silicon carbide) and the like are grown on a graphene sheet structure to form a graphene-heat conductive particle heterojunction material, and the heat conductivity of the graphene heat dissipation coating designed or obtained by using a formula is more than 3W/mK.
Chinese patent CN 109370414B discloses a graphene heat dissipation coating and a preparation method thereof, in the coating preparation process, a matter aggregation structure generated by chemical combination of graphene oxide, a heat conduction carrier material and an aminated carbon nanotube is opened and uniformly dispersed in polyamide resin through grinding, impacting and shearing actions of a planetary mixer, then the dispersed slurry is added into a basket grinder, and high-speed nano grinding is performed through nano dispersing equipment, so that the fineness of the slurry reaches the nanometer level, and a coating prepared by using the graphene slurry is uniformly dispersed with heat conduction media.
Chinese patent CN 111534177A discloses a water-based graphene heat dissipation coating and a preparation method thereof, wherein graphene powder is directly added into a coating system, and an antirust agent and a flame retardant are simultaneously added, and the prepared graphene heat dissipation coating has flame-retardant and anti-corrosion properties by combining a basket type sand grinding mode and a planetary grinding mode.
Disclosure of Invention
The invention aims to solve the problems that heat is accumulated due to illumination all the year round in the existing charging pile and potential safety hazards exist in equipment operation due to the fact that heat cannot be dissipated timely, and provides a graphene efficient heat dissipation anticorrosive paint for the charging pile, which is formed by utilizing a modified heat conduction graphene material and epoxy resin to form a space network heat conduction polymer structure to enhance the heat dissipation area of a coating and increase heat conduction transmission channels of graphene and metal, and a preparation method thereof.
The structure of the space network heat-conducting polymer is shown in figure 1.
The graphene high-heat-dissipation anticorrosive paint for the charging pile comprises the following components in parts by mass:
40-50 parts of epoxy resin;
5-8 parts of a modified heat-conducting graphene material;
22-30 parts of heat-conducting filler;
10-18 parts of an anticorrosive filler;
3-5 parts of an auxiliary agent;
6-10 parts of a solvent;
16-20 parts of an epoxy curing agent.
The epoxy resin can be selected from bisphenol A epoxy resin or bisphenol F epoxy resin, and the bisphenol A epoxy resin or bisphenol F epoxy resin can be selected from one or more of 601, 6101, 616 and 618.
The silane coupling agent can be one or more compounds with terminal groups containing epoxy groups.
The graphene material can be selected from a reduced graphene oxide material, and the number of layers is 3-5.
The anticorrosive filler can be selected from two or more of mica powder, glass flakes, graphite flakes, aluminum powder, calcium carbonate, barite, barium sulfate, iron oxide red, iron oxide black, mica iron oxide red and mica iron oxide black.
The thermally conductive filler may be selected from aluminum nitride (AlN), Boron Nitride (BN), silicon carbide (SiC), magnesium oxide (MgO), alpha-alumina (Al)2O3Acicular), alpha-alumina (Al)2O3Spherical), zinc oxide (ZnO), silicon dioxide (SiO)2Crystalline type), carbon powder.
The auxiliary agent can be selected from two or more of BYK110, BYK530A, fumed silica and glass beads.
The solvent can be one or more selected from toluene, xylene, n-butanol, butyl acetate, cyclohexane, cyclopentanone, propylene carbonate and ethylene carbonate.
The epoxy curing agent can be one or more of an amidoamine curing agent, a polyamide adduct curing agent and a cardanol modified phenolic aldehyde amine curing agent.
The preparation method of the graphene high-heat-dissipation anticorrosive paint for the charging pile comprises the following specific steps.
(1) And adding the epoxy resin into a dispersion tank, adding the auxiliary agent, and dispersing at a high speed of 600r/min for 0.5h to obtain a resin solution system.
(2) Adding the modified heat-conducting graphene material, the heat-conducting filler and the anticorrosive filler into the resin solution system obtained in the step (1) in batches, and dispersing at a high speed of 1000r/min for 1h to obtain a viscous liquid mixture.
(3) And (3) adding the solvent into the viscous liquid mixture obtained in the step (2) in batches to adjust the viscosity of the mixture, and dispersing at a high speed of 1500r/min for 1h to obtain the pre-dispersion coating.
(4) And (4) continuously dispersing the pre-dispersed coating obtained in the step (3) at the rotating speed of 1800r/min until the fineness of the coating is less than or equal to 60 mu m.
(5) And (3) mixing and uniformly stirring the epoxy curing agent and the mixture obtained in the step (4) according to the mass part to obtain the graphene high-heat-dissipation anticorrosive paint containing the space network heat-conducting polymer structure for the charging pile.
The preparation method of the modified heat-conducting graphene material comprises the following steps.
(1) Adding the heat-conducting graphene material into an ethanol solvent, stirring uniformly at room temperature, and continuing to perform ultrasonic dispersion for 1h to obtain a solution A.
(2) Adding a silane coupling agent with an epoxy group at the end group into the solution A obtained in the step (1), adjusting the pH =6, and reacting at 60 ℃ for 4h to obtain a solution B.
(3) And (3) centrifuging and filtering the solution B obtained in the step (2), repeatedly washing the washing solution for many times to be neutral, and drying to obtain the modified heat-conducting graphene material.
Compared with the prior art, the graphene high-heat-dissipation anticorrosive coating for the charging pile has the following beneficial effects.
(1) According to the graphene high-heat-dissipation anticorrosive coating for the charging pile and the preparation method thereof, the epoxy-terminated silane coupling agent is compounded with the graphene material, so that an organic-inorganic dual-phase structure can be formed on the surface of the graphene, good dispersibility between the graphene and an organic matrix is ensured, meanwhile, the matching property between the graphene and an inorganic filler is improved, and the performance of the graphene material is well ensured.
(2) According to the graphene high-heat-dissipation anticorrosive coating for the charging pile and the preparation method thereof, the modified heat-conducting graphene material and the epoxy resin form chemical bonding, a space network heat-conducting polymer structure is established, the graphene is connected with the resin, the problem of poor heat-conducting property of an organic polymer is fundamentally solved, the graphene can be well distributed along with the resin matrix, and the heat-dissipation area of the coating is effectively increased.
(3) According to the graphene high-heat-dissipation anticorrosive coating for the charging pile and the preparation method thereof, the high-heat-conductivity graphene material is introduced, so that a heat transmission channel can be formed between the heat-conducting metal fillers, the heat transfer efficiency between the heat-conducting fillers is improved, the using amount of the heat-conducting fillers is reduced, the coating cost is reduced while the adding amount of an organic solvent is reduced, and the coating has considerable environmental protection and economical efficiency.
(4) According to the graphene high-heat-dissipation anticorrosive coating for the charging pile and the preparation method thereof, the shielding property of the sheet-layer graphene material is combined with the anticorrosive filler, the graphene material is modified to ensure effective layered distribution, the transmission path of corrosive media such as water and chloride ions is greatly increased, and the corrosion protection performance of the coating is ensured. Meanwhile, the amount of the anticorrosive filler can be reduced, the addition amount of the organic solvent is reduced, and the requirements of the national existing environmental protection policy are met.
Drawings
Fig. 1 is a structure of a space network heat-conducting polymer compound, wherein a black frame is a modified heat-conducting graphene material.
Detailed Description
The present invention is further described below in conjunction with specific examples so that those skilled in the art may better understand the present invention and can practice it.
Example 1:
the graphene high-heat-dissipation anticorrosive paint for the charging pile comprises the following components in parts by weight:
40g of epoxy resin;
5g of modified heat-conducting graphene material;
22g of heat-conducting filler;
18g of anticorrosive filler;
3g of auxiliary agent;
6g of a solvent;
16g of epoxy curing agent.
The graphene high-heat-dissipation anticorrosive coating for the charging pile has the adhesive force of 8MPa with a base material, the heat conductivity coefficient of 18W/mK, and the surface of the coating resistant to neutral salt spray (Sa2.5 grade, 3000 h) has no foaming and corrosion phenomena.
Example 2:
the graphene high-heat-dissipation anticorrosive paint for the charging pile comprises the following components in parts by weight:
50g of epoxy resin;
6g of modified heat-conducting graphene material;
26g of heat-conducting filler;
14g of anticorrosive filler;
4g of auxiliary agent;
8g of solvent;
20g of epoxy curing agent.
The graphene high-heat-dissipation anticorrosive coating for the charging pile has the advantages that the adhesive force with a base material is 9MPa, the heat conductivity coefficient is 19W/mK, and the surface of the coating resistant to neutral salt spray (Sa2.5 grade, 3600 h) does not have the phenomena of foaming and rusting.
Example 3:
45g of epoxy resin;
8g of modified heat-conducting graphene material;
30g of heat-conducting filler;
10g of anticorrosive filler;
5g of auxiliary agent;
10g of a solvent;
18g of epoxy curing agent.
The graphene high-heat-dissipation anticorrosive coating for the charging pile has the advantages that the adhesive force with a base material is 9MPa, the heat conductivity coefficient is 20W/mK, and the surface of the coating resistant to neutral salt spray (Sa2.5 grade, 4000 h) does not have the phenomena of foaming and rusting.
Example 4:
50g of epoxy resin;
8g of modified heat-conducting graphene material;
30g of heat-conducting filler;
10g of anticorrosive filler;
5g of auxiliary agent;
10g of a solvent;
20g of epoxy curing agent.
The graphene high-heat-dissipation anticorrosive coating for the charging pile has the adhesive force of 10MPa with a base material, the heat conductivity coefficient of 21W/mK, and the surface of the coating resistant to neutral salt spray (Sa2.5 grade, 4000 h) has no foaming and corrosion phenomena.
Example 5:
45g of epoxy resin;
5g of modified heat-conducting graphene material;
22g of heat-conducting filler;
18g of anticorrosive filler;
3g of auxiliary agent;
6g of a solvent;
20g of epoxy curing agent.
The graphene high-heat-dissipation anticorrosive coating for the charging pile has the adhesive force of 8MPa with a base material, the heat conductivity coefficient of 18W/mK, and the surface of the coating resistant to neutral salt spray (Sa2.5 grade, 2500 h) has no foaming and corrosion phenomena.
Example 6:
40g of epoxy resin;
8g of modified heat-conducting graphene material;
30g of heat-conducting filler;
18g of anticorrosive filler;
3g of auxiliary agent;
10g of a solvent;
18g of epoxy curing agent.
The graphene high-heat-dissipation anticorrosive coating for the charging pile has the adhesive force of 11MPa with a base material, the heat conductivity coefficient of 22W/mK, and the surface of the neutral salt spray (Sa2.5 grade, 4500 h) resistant coating has no foaming and corrosion phenomena.
The main performance test results of the graphene high-heat-dissipation anticorrosive paint for the charging pile are shown in the following table.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and various modifications, combinations, partial combinations, and substitutions made according to the design concept of the present invention are included in the scope of the present invention.
Claims (13)
1. The graphene high-heat-dissipation anticorrosive paint for the charging pile is characterized by comprising the following components in parts by mass:
40-50 parts of epoxy resin;
5-8 parts of a modified heat-conducting graphene material;
22-30 parts of heat-conducting filler;
10-18 parts of an anticorrosive filler;
3-5 parts of an auxiliary agent;
6-10 parts of a solvent;
16-20 parts of an epoxy curing agent.
2. The graphene high-heat-dissipation anticorrosive paint for charging piles according to claim 1, wherein the epoxy resin is selected from bisphenol a epoxy resin or bisphenol F epoxy resin, the modified heat-conducting graphene material is selected from silane coupling agent modified heat-conducting graphene material, and the anticorrosive filler is selected from lamellar anticorrosive paint and heavy anticorrosive filler.
3. The graphene high-heat-dissipation anticorrosive paint for charging piles according to claim 2, wherein the bisphenol A epoxy resin or bisphenol F epoxy resin is selected from one or more of 601, 6101, 616 and 618.
4. The graphene high-heat-dissipation anticorrosive paint for charging piles according to claim 2, wherein the silane coupling agent is one or more selected from compounds with terminal groups containing epoxy groups.
5. The graphene high-heat-dissipation anticorrosive coating for charging piles according to claim 2, wherein the graphene material is selected from a reduced graphene oxide material, and the number of layers is 3-5.
6. The graphene high-heat-dissipation anticorrosive paint for charging piles according to claim 2, wherein the lamellar anticorrosive paint and the heavy anticorrosive filler are two or more selected from mica powder, glass flakes, graphite flakes, aluminum powder, calcium carbonate, barite, barium sulfate, red iron oxide, black iron oxide, red mica iron oxide and black mica iron oxide.
7. The graphene high-heat-dissipation anticorrosive paint for charging piles according to claim 2, wherein the heat-conducting filler is selected from aluminum nitride (AlN), Boron Nitride (BN), silicon carbide (SiC), magnesium oxide (MgO), and alpha-alumina (Al)2O3Acicular), alpha-alumina (Al)2O3Spherical), zinc oxide (ZnO), silicon dioxide (SiO)2Crystalline type), carbon powder.
8. The graphene high-heat-dissipation anticorrosive paint for charging piles as claimed in claim 1, wherein the auxiliary agent is two or more selected from BYK110, BYK530A, fumed silica and glass beads.
9. The graphene high-heat-dissipation anticorrosive paint for charging piles according to claim 1, wherein the solvent is one or more selected from toluene, xylene, n-butanol, butyl acetate, cyclohexane, cyclopentanone, propylene carbonate and ethylene carbonate.
10. The graphene high-heat-dissipation anticorrosive paint for charging piles as claimed in claim 1, wherein the epoxy curing agent is one or more selected from an amido amine curing agent, a polyamide adduct curing agent and a cardanol modified phenolic amine curing agent.
11. The preparation method of the graphene high-heat-dissipation anticorrosive paint for the charging pile according to claim 1, which is characterized by comprising the following specific steps:
(1) adding epoxy resin into a dispersion tank, adding an auxiliary agent, and dispersing at a high speed of 600r/min for 0.5h to obtain a resin solution system;
(2) adding the modified heat-conducting graphene material, the heat-conducting filler and the anticorrosive filler into the resin solution system obtained in the step (1) in batches, and dispersing at a high speed of 1000r/min for 1h to obtain a viscous liquid mixture;
(3) adding a solvent into the viscous liquid mixture obtained in the step (2) in batches to adjust the viscosity of the mixture, and dispersing at a high speed of 1500r/min for 1h to obtain a pre-dispersion coating;
(4) dispersing the pre-dispersed coating obtained in the step (3) at the rotating speed of 1800r/min until the fineness of the coating is less than or equal to 60 mu m;
(5) and (3) mixing and uniformly stirring the epoxy curing agent and the mixture obtained in the step (4) according to the mass part to obtain the graphene high-heat-dissipation anticorrosive paint containing the space network heat-conducting polymer structure for the charging pile.
12. The preparation method of the modified heat-conducting graphene material comprises the following steps:
(1) adding a heat-conducting graphene material into an ethanol solvent, uniformly stirring at room temperature, and continuing to perform ultrasonic dispersion for 1h to obtain a solution A;
(2) adding a silane coupling agent with an epoxy group at a terminal into the solution A obtained in the step (1), adjusting the pH =6, and reacting at 60 ℃ for 4h to obtain a solution B;
(3) and (3) centrifuging and filtering the solution B obtained in the step (2), repeatedly washing the washing solution for many times to be neutral, and drying to obtain the modified heat-conducting graphene material.
13. The preparation method of the graphene high-heat-dissipation anticorrosive paint for charging piles according to claim 11, wherein the structure of the space network heat-conducting polymer is shown in figure 1.
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Cited By (3)
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CN113355016A (en) * | 2021-07-01 | 2021-09-07 | 江苏华晟国联科技有限公司 | Water-based graphene conductive energy-storage heating anticorrosive paint and preparation method thereof |
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