CN111500153A - Three-dimensional graphene water-based heat-conducting anticorrosive paint and preparation method thereof - Google Patents
Three-dimensional graphene water-based heat-conducting anticorrosive paint and preparation method thereof Download PDFInfo
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- 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
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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
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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
- C09D5/08—Anti-corrosive paints
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/43—Thickening agents
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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
- 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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- 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
- C09D7/63—Additives non-macromolecular organic
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/80—Processes for incorporating ingredients
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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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Abstract
A three-dimensional graphene water-based heat-conducting anticorrosive coating and a preparation method thereof relate to the technical field of coating production and also relate to the technical field of metal surface treatment. Dispersing three-dimensional graphene, deionized water and polyvinyl alcohol under an ultrasonic condition to obtain a three-dimensional graphene dispersion liquid; adding the three-dimensional graphene dispersion liquid, the auxiliary agent and the filler into fatty alcohol, primarily stirring, and then putting into a sand mill for grinding to obtain a component I; the component II is bisphenol A epoxy resin emulsion. And mixing the component I and the component II according to the weight ratio of 100: 55-62 to obtain the three-dimensional graphene water-based heat-conducting anticorrosive coating. The coating can be used for producing high-corrosion-resistance heat-dissipation aluminum foils, and the cross-boundary application of graphene in the corrosion-resistance heat-dissipation aluminum foils is realized.
Description
Technical Field
The invention relates to the technical field of paint production and also relates to the technical field of metal surface treatment.
Background
The heat-conducting anticorrosive paint is a metal surface paint widely applied to industrial equipment such as heat exchangers and the like, has the main functions of providing certain corrosion protection capability, simultaneously has good heat conduction and heat dissipation, leads out heat of coated aluminum materials to ensure normal working temperature of the equipment, and has wide application. Most of the coating is a mixed system taking organic polymers as film forming materials, and the coating after film forming is mainly coated by organic matters, has low thermal conductivity and mainly plays a role in heat conduction by depending on inorganic fillers in the coating.
Graphene is a material which is rapidly researched and developed in recent years, and has been widely applied to the anticorrosion field and the preparation of heat-conducting coatings due to excellent structural stability and special properties in the aspects of electricity, heat, mechanics and the like. However, the two-dimensional graphene with good quality sold in the market at present is only expensive and is very easy to agglomerate, so that the actual effect is influenced, and the industrial application is difficult to realize.
The three-dimensional graphene material is a three-dimensional space mesh porous material formed by interweaving two-dimensional lamellar graphene, and compared with the two-dimensional graphene with a lamellar structure, the three-dimensional graphene has higher mechanical strength and heat conduction and electric conductivity. More importantly, the porous structure of the three-dimensional graphene well avoids the agglomeration and accumulation of the graphene, and then the three-dimensional foam structure can form a more continuous interpenetrating heat-conducting network and can be used as an ideal modified material of a heat-conducting polymer matrix. Su Ying et al report that the thermal conductivity of the three-dimensional graphene modified epoxy resin composite material is 7 times that of epoxy resin. This indicates that the three-dimensional graphene modified epoxy resin is an effective means for enhancing the thermal conductivity of the coating.
For example, the method of CN 105110322 a can obtain three-dimensional graphene with large pores and interconnected pores, which is self-supported by carbon skeleton.
Further, for example, CN 109336092A can be used to obtain a porous material having a pore volume of 0.01 to 0.035cm with a pore diameter of 2nm or less3And/g, the specific surface area is large because the three-dimensional graphene has a large number of micropores.
Disclosure of Invention
In order to overcome the technical defects, the invention provides a water-based heat-conducting anticorrosive coating formed by using three-dimensional graphene with a large specific surface area.
The invention consists of a component I and a component II in a weight ratio of 100: 55-62;
the component I is a mixture consisting of fatty alcohol, an auxiliary agent, three-dimensional graphene dispersion liquid and a filler, wherein the three-dimensional graphene dispersion liquid consists of three-dimensional graphene, deionized water and polyvinyl alcohol, and the concentration of the three-dimensional graphene in the three-dimensional graphene dispersion liquid is 2 g/L-10 g/L;
the component II is bisphenol A epoxy resin emulsion.
The invention utilizes the three-dimensional graphene with larger specific surface area to prepare the water-based heat-conducting anticorrosive coating, and the coating can be used for producing the high-corrosion-resistant heat-dissipation aluminum foil, thereby realizing the cross-boundary application of the graphene in the corrosion-resistant heat-dissipation aluminum foil. The technology can be applied to coating the surface of the aluminum foil in a double-drying hot air circulation automatic coating device, so that the aluminum foil with high heat conduction and heavy corrosion resistance is prepared, the technology is used in a heat-conducting corrosion-resistant aluminum foil, the pollution of coating to the environment can be avoided, the corrosion protection performance is improved, the heat dispersion of the 5G base station can be greatly improved, the energy consumption of the base station is reduced, and the construction of the 5G base station is promoted for the cross-border application of graphene in the 5G field.
Furthermore, the three-dimensional graphene has a 3-7-layer structure, and the specific surface area of the three-dimensional graphene is more than or equal to 600m2(ii) in terms of/g. The graphene is different from graphene prepared by common graphite on the market, has a large surface area, is not easy to agglomerate due to a three-dimensional interpenetrating network structure, has good dispersibility and stability in the coating, and increases the thermal conductivity between the coating surface layer and the substrate. However, the three-dimensional graphene has a large specific surface area and a high oil absorption value, and the ratio of graphene, the filler and the component I to the component II needs to be adjusted.
The fatty alcohol, the auxiliary agent and the three-dimensional graphene dispersion liquid respectively account for 30 percent, 1 percent to 3 percent and 30 percent to 40 percent of the component I by weight, and the rest is the filler. The fatty alcohol is a hydrophilic solvent and is used for replacing a volatile organic solvent, so that the discharge of VOCs is effectively reduced, and the environment is protected.
The auxiliary agent is at least one of polysiloxane defoaming agent, acrylic acid wetting agent and polyurethane thickener. The three auxiliary agents are mainly used for optimizing the performance of the water-based paint and improving the leveling property, the adhesive force and the viscosity of the paint.
The filler is composed of a mixture of sericite, talcum powder and basic zinc phosphate, the weight ratio of sericite, talcum powder and basic zinc phosphate is 4-5: 2: 1, wherein the sericite is used for improving the weather resistance of a coating, and the talcum powder can improve the precipitation property of a coating, the mechanical force of the coating and the recoatability; the basic zinc phosphate has excellent rust resistance and water resistance.
The invention also aims to provide a preparation method of the three-dimensional graphene water-based heat-conducting anticorrosive paint.
Mixing three-dimensional graphene, deionized water and polyvinyl alcohol, and performing ultrasonic dispersion under the power of 100W-150W to obtain a three-dimensional graphene dispersion liquid with the concentration of 2 g/L-10 g/L;
adding the three-dimensional graphene dispersion liquid, the auxiliary agent and the filler into fatty alcohol, primarily stirring, and then putting into a sand mill for grinding to obtain a component I with the fineness of less than or equal to 40 microns;
the component II is bisphenol A epoxy resin emulsion;
and mixing the component I and the component II according to the weight ratio of 100: 55-62 to obtain the three-dimensional graphene water-based heat-conducting anticorrosive coating. The process of the invention has the characteristics that the use of organic solvent is avoided, and the dispersion stability and the construction performance of the coating are improved by adopting fatty alcohol as a surface active substance; because the greatest difficulty of the graphene is the problem of dispersibility in water, the method for preparing the three-dimensional graphene dispersion liquid and then preparing the component I has the advantages that the solubilization effect of the polyvinyl alcohol surfactant is utilized to prepare a dispersion emulsion, so that the dispersibility of the graphene in an aqueous solvent is improved, and the good dispersibility of the graphene in the coating is also ensured; the advantages of adding other raw materials into the fatty alcohol, and the advantages of firstly stirring and then putting into a sand mill for grinding are that the dispersion uniformity of the graphene in the coating is further ensured; the component I with the fineness of less than 40 mu m can improve the storage stability of the product and the surface flatness of a coating film.
Detailed Description
Firstly, a coating preparation process:
example 1:
1. preparing a three-dimensional graphene dispersion liquid:
respectively weighing 2g of three-dimensional graphene, 1000g of deionized water and 0.2g of polyvinyl alcohol, mixing, and performing ultrasonic dispersion for 60min under the power of 100W to obtain a three-dimensional graphene dispersion liquid with the concentration of 2 g/L.
The three-dimensional graphene has a 3-layer structure and a specific surface area of 720m2/g。
2. Preparing materials:
30g of fatty alcohol, 0.3g of polysiloxane antifoaming agent, 0.3g of acrylic acid wetting agent, 0.4g of polyurethane thickener, 40g of three-dimensional graphene dispersion liquid, 17g of sericite, 8g of talcum powder and 4g of basic zinc phosphate are weighed respectively.
3. Preparation of component I: adding a polysiloxane defoaming agent, an acrylic acid wetting agent, a polyurethane thickener, a three-dimensional graphene dispersion liquid, sericite, talcum powder and basic zinc phosphate into fatty alcohol, manually stirring for 5min, then putting into a sand mill, grinding until the fineness reaches 40 mu m, and discharging to obtain the component I.
4. Preparation of component II:
and taking bisphenol A epoxy resin emulsion to obtain the component II.
5. Preparing the three-dimensional graphene water-based heat-conducting anticorrosive coating:
weighing 100g of the component I and 55g of the component II, mixing, and manually stirring for 2min to obtain the three-dimensional graphene water-based heat-conducting anticorrosive coating.
Example 2:
1. preparing a three-dimensional graphene dispersion liquid:
respectively weighing 5g of three-dimensional graphene, 1000g of deionized water and 0.5 g of polyvinyl alcohol, mixing, and performing ultrasonic dispersion for 30min under the power of 150W to obtain a three-dimensional graphene dispersion liquid with the concentration of 5 g/L.
The three-dimensional graphene has a 5-layer structure and a specific surface area of 655m2/g。
2. Preparing materials:
30g of fatty alcohol, 0.3g of polysiloxane antifoaming agent, 0.2g of acrylic acid wetting agent, 1g of polyurethane thickener, 35g of three-dimensional graphene dispersion liquid, 20.3g of sericite, 8.8g of talcum powder and 4.4g of basic zinc phosphate are weighed respectively.
3. Preparation of component I:
adding a polysiloxane defoaming agent, an acrylic acid wetting agent, a polyurethane thickener, a three-dimensional graphene dispersion liquid, sericite, talcum powder and basic zinc phosphate into fatty alcohol, manually stirring for 3min, then putting into a sand mill, grinding until the fineness reaches 40 mu m, and discharging to obtain the component I.
4. Preparation of component II:
and taking bisphenol A epoxy resin emulsion to obtain the component II.
5. Preparing the three-dimensional graphene water-based heat-conducting anticorrosive coating:
and weighing 100g of the component I and 62g of the component II, mixing, and manually stirring for 2min to obtain the three-dimensional graphene water-based heat-conducting anticorrosive coating.
Example 3:
1. preparing a three-dimensional graphene dispersion liquid:
respectively weighing 10g of three-dimensional graphene, 1000g of deionized water and 1.0 g of polyvinyl alcohol, mixing, and performing ultrasonic dispersion for 30min under the power of 130W to obtain a three-dimensional graphene dispersion liquid with the concentration of 10 g/L.
The three-dimensional graphene has a 7-layer structure and a specific surface area of 612m2/g。
2. Preparing materials:
30g of fatty alcohol, 0.3g of polysiloxane antifoaming agent, 0.3g of acrylic acid wetting agent, 0.4g of polyurethane thickener, 40g of three-dimensional graphene dispersion liquid, 17g of sericite, 8g of talcum powder and 4g of basic zinc phosphate are weighed respectively.
3. Preparation of component I:
adding a polysiloxane defoaming agent, an acrylic acid wetting agent, a polyurethane thickener, a three-dimensional graphene dispersion liquid, sericite, talcum powder and basic zinc phosphate into fatty alcohol, manually stirring for 5min, then putting into a sand mill, grinding until the fineness reaches 40 mu m, and discharging to obtain the component I.
4. Preparation of component II:
and taking bisphenol A epoxy resin emulsion to obtain the component II.
5. Preparing the three-dimensional graphene water-based heat-conducting anticorrosive coating:
weighing 100g of the component I and 58g of the component II, mixing, and manually stirring for 2min to obtain the three-dimensional graphene water-based heat-conducting anticorrosive coating.
Secondly, application:
1. substrate pretreatment:
and respectively cleaning the surface of the aluminum foil by using a surface cleaning agent and deionized water and drying the aluminum foil to obtain a clean aluminum foil substrate.
2. Coating:
and (3) spraying the three-dimensional graphene water-based heat-conducting anticorrosive paint on the surface of the substrate by using a spray gun, wherein the coating thickness is 0.1-0.5 mm.
The prepared three-dimensional graphene water-based heat-conducting anticorrosive paint is applied within 6 hours.
3. And (3) curing:
and (3) placing the plate coated with the three-dimensional graphene water-based heat-conducting anticorrosive coating in a normal temperature environment, and curing the coating after 5-7 days.
Thirdly, the performance of the aluminum foil substrate treated by the coating is as follows:
the substrate can be kept from being corroded after 500 hours under the simulated accelerated corrosion of neutral salt spray, so that the prepared aluminum foil coated with the three-dimensional graphene water-based heat-conducting anticorrosive coating has excellent corrosion resistance.
The aluminum foil substrate treated by the coating is tested for thermal conductivity, the thermal conductivity reaches 2.8W/(m.K), and the thermal conductivity is good.
Claims (10)
1. A three-dimensional graphene water-based heat-conducting anticorrosive coating is characterized by comprising a component I and a component II in a weight ratio of 100: 55-62;
the component I is a mixture consisting of fatty alcohol, an auxiliary agent, three-dimensional graphene dispersion liquid and a filler, wherein the three-dimensional graphene dispersion liquid consists of three-dimensional graphene, deionized water and polyvinyl alcohol, and the concentration of the three-dimensional graphene in the three-dimensional graphene dispersion liquid is 2 g/L-10 g/L;
the component II is bisphenol A epoxy resin emulsion.
2. The three-dimensional graphene water-based heat-conducting anticorrosive coating as claimed in claim 1, wherein the three-dimensional graphene is of a 3-7-layer structure, and the specific surface area of the three-dimensional graphene is not less than 600m2/g。
3. The three-dimensional graphene water-based heat-conducting anticorrosive coating as claimed in claim 1 or 2, wherein the fatty alcohol, the auxiliary agent and the three-dimensional graphene dispersion liquid respectively account for 30% by weight, 1% by weight to 3% by weight and 30% by weight to 40% by weight of the component I, and the balance is the filler.
4. The three-dimensional graphene water-based heat-conducting anticorrosive paint according to claim 3, wherein the auxiliary agent is at least any one of a polysiloxane defoamer, an acrylic wetting agent and a polyurethane thickener.
5. The three-dimensional graphene water-based heat-conducting anticorrosive paint according to claim 3, wherein the filler is composed of a mixture of sericite, talcum powder and basic zinc phosphate, and the weight ratio of sericite, talcum powder and basic zinc phosphate is 3-5: 2: 1.
6. The preparation method of the three-dimensional graphene water-based heat-conducting anticorrosive paint as claimed in claim 1, characterized in that:
mixing three-dimensional graphene, deionized water and polyvinyl alcohol, and performing ultrasonic dispersion under the power of 100W-150W to obtain a three-dimensional graphene dispersion liquid with the concentration of 2 g/L-10 g/L;
adding the three-dimensional graphene dispersion liquid, the auxiliary agent and the filler into fatty alcohol, primarily stirring, and then putting into a sand mill for grinding to obtain a component I with the fineness of less than or equal to 40 microns;
the component II is bisphenol A epoxy resin emulsion;
and mixing the component I and the component II according to the weight ratio of 100: 55-62 to obtain the three-dimensional graphene water-based heat-conducting anticorrosive coating.
7. The preparation method of the three-dimensional graphene water-based heat-conducting anticorrosive paint according to claim 6, characterized by comprising the following steps: the three-dimensional graphene is in a 3-7-layer structure, and the specific surface area of the three-dimensional graphene is more than or equal to 600m2/g。
8. The preparation method of the three-dimensional graphene water-based heat-conducting anticorrosive paint according to claim 6 or 7, characterized by comprising the following steps: the fatty alcohol, the auxiliary agent and the three-dimensional graphene dispersion liquid respectively account for 30 percent, 1 percent to 3 percent and 30 percent to 40 percent of the component I by weight, and the rest is the filler.
9. The preparation method of the three-dimensional graphene water-based heat-conducting anticorrosive paint according to claim 8, characterized by comprising the following steps: the auxiliary agent is at least one of polysiloxane defoaming agent, acrylic acid wetting agent and polyurethane thickener.
10. The preparation method of the three-dimensional graphene water-based heat-conducting anticorrosive paint according to claim 8, characterized by comprising the following steps: the filler is composed of a mixture of sericite, talcum powder and basic zinc phosphate, and the weight ratio of the sericite, the talcum powder and the basic zinc phosphate is 3-5: 2: 1.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995933A (en) * | 2020-09-11 | 2020-11-27 | 松山湖材料实验室 | Three-dimensional graphene water-based epoxy anticorrosive paint, and preparation method and application method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106366710A (en) * | 2016-09-12 | 2017-02-01 | 中国航空工业集团公司北京航空材料研究院 | Graphene heat-conducting anticorrosive water-based paint, and preparation and application methods thereof |
| CN108610786A (en) * | 2016-12-12 | 2018-10-02 | 中国科学院上海硅酸盐研究所 | A kind of super-hydrophobic coat and preparation method thereof based on three-dimensional grapheme |
| CN110846743A (en) * | 2019-11-21 | 2020-02-28 | 泰州莱宝利复合材料科技有限公司 | Method for preparing three-dimensional graphene powder |
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2020
- 2020-05-26 CN CN202010452542.8A patent/CN111500153A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106366710A (en) * | 2016-09-12 | 2017-02-01 | 中国航空工业集团公司北京航空材料研究院 | Graphene heat-conducting anticorrosive water-based paint, and preparation and application methods thereof |
| CN108610786A (en) * | 2016-12-12 | 2018-10-02 | 中国科学院上海硅酸盐研究所 | A kind of super-hydrophobic coat and preparation method thereof based on three-dimensional grapheme |
| CN110846743A (en) * | 2019-11-21 | 2020-02-28 | 泰州莱宝利复合材料科技有限公司 | Method for preparing three-dimensional graphene powder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995933A (en) * | 2020-09-11 | 2020-11-27 | 松山湖材料实验室 | Three-dimensional graphene water-based epoxy anticorrosive paint, and preparation method and application method thereof |
| CN111995933B (en) * | 2020-09-11 | 2022-03-22 | 松山湖材料实验室 | Three-dimensional graphene water-based epoxy anticorrosive paint, and preparation method and application method thereof |
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