CN112680034A - Anticorrosive heat-insulating coating and preparation method thereof - Google Patents
Anticorrosive heat-insulating coating and preparation method thereof Download PDFInfo
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- CN112680034A CN112680034A CN202011544234.4A CN202011544234A CN112680034A CN 112680034 A CN112680034 A CN 112680034A CN 202011544234 A CN202011544234 A CN 202011544234A CN 112680034 A CN112680034 A CN 112680034A
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Abstract
The invention provides an anticorrosive heat-insulating coating, which comprises the following components: 50-60 parts of purified water; 1-2 parts of a film-forming assistant; 2-3 parts of a preservative; 5-10 parts of talcum powder; 1-2 parts of a dispersant; 0.1-0.2 part by weight of defoaming agent; 5-10 parts of porous powder quartz; 5-10 parts of heavy calcium carbonate; 30-50 parts of styrene-acrylic emulsion; 5-10 parts of hollow glass beads; 0.1-0.2 parts of graphene. The problem of static electricity is solved by adding the graphene, and the heat insulation performance and the corrosion resistance of the coating are normally kept and are not influenced. Thus, a coating for construction having good stability and solving the problem of static electricity is obtained.
Description
Technical Field
The invention relates to an anticorrosive heat-insulating material, in particular to a water-based anticorrosive heat-insulating coating with an antistatic effect and a preparation method thereof.
Background
The 'heat insulation coating' is a functional water-based coating which is developed recently and used for blocking, reflecting and radiating sunlight near infrared heat, so that the roof is heat-insulated and cooled, and energy is saved and consumption is reduced. The composite material has the characteristics of heat insulation, water resistance, rust prevention, corrosion prevention, short construction period and quick response, and can comprehensively replace water spraying systems, heat preservation cotton, foaming sponge, interlayer iron sheets and the like. The heat-insulating coating is classified into three types from the characteristic principle, namely, an insulating conductive heat-insulating coating, a reflective heat-insulating coating and a radiant heat-insulating coating. Besides the three types of heat-insulating coatings, foreign heat-insulating functional coatings have already appeared to be heat-insulating heat-preserving coatings, and have peculiar heat-preserving effects besides the advantages of the heat-insulating coatings.
An anticorrosive coating is an essential coating in paint coatings. The conventional anticorrosive paint plays a role in corrosion resistance on metals and the like under common conditions, and protects the service life of nonferrous metals.
With the progress of technology, coatings having both anticorrosive and heat-insulating functions have appeared, and in some special occasions, such as anticorrosive and heat-insulating treatment of the surface of metal products in the building industry and chemical industry, etc. However, in some cases, such coatings have problems with the generation of static electricity, particularly in dry environments, which can be problematic for some applications.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an anticorrosive heat-insulating coating for reducing or eliminating static electricity and a preparation method thereof.
The invention provides an anticorrosive heat-insulating coating which comprises the following components: 50-60 parts of purified water; 1-2 parts of a film-forming assistant; 2-3 parts of a preservative; 5-10 parts of talcum powder; 1-2 parts of a dispersant; 0.1-0.2 part by weight of defoaming agent; 5-10 parts of porous powder quartz; 5-10 parts of heavy calcium carbonate; 30-50 parts of styrene-acrylic emulsion; 5-10 parts of hollow glass beads; 0.1-0.2 parts of graphene.
The beneficial effect of above-mentioned scheme does: the problem of static electricity is solved by adding the graphene, and the heat insulation performance and the corrosion resistance of the coating are normally kept and are not influenced. Thus, a coating for construction having good stability and solving the problem of static electricity is obtained.
In a preferred scheme, the graphene is loaded on the porous powder quartz, and the graphene is loaded on the porous powder quartz in a sintering mode.
In a preferred scheme, the graphene is coated on the porous powder quartz, and the surface of the graphene is condensed with the surface aminated porous powder quartz amide to form the modified material.
In a preferred embodiment, the film-forming assistant is at least one of benzyl alcohol, ethylene glycol butyl ether, propylene glycol phenyl ether and dodecyl alcohol ester (the compatibility is best, and the flocculation is carried out on the other three).
The preparation method of the anticorrosive heat-insulating coating provided by the invention comprises the following steps:
s1: uniformly stirring purified water, a film forming auxiliary agent, a preservative and a dispersing agent;
s2: adding talcum powder, a defoaming agent, porous powder quartz, heavy calcium carbonate, hollow glass beads and graphene into S1 under high-speed stirring, controlling the particle size to be below 50 mu m, and finally adding styrene-acrylic emulsion to form a finished product.
One preferred scheme is that graphene is loaded on porous powder quartz, and the graphene is loaded on the porous powder quartz in a sintering mode; the method comprises the following steps: mixing graphene powder and porous quartz powder, filling the mixture into a mold, sintering the mixture in a sintering furnace at the sintering temperature of 900 ℃ under the vacuum condition, wherein the sintering pressure is 50MPa, and crushing and grinding the sintered mixture to obtain a powdery substance.
According to a preferable scheme, the graphene is coated on porous powder quartz, the porous powder quartz is surface aminated porous powder quartz, and the surface of the graphene is condensed with surface aminated porous powder quartz amide to form a material; the method comprises the following steps: obtaining graphene with oxygen-containing groups on the surface, obtaining porous powdered quartz with aminated surface, and locking the graphene with oxygen-containing groups on the surface and the porous powdered quartz with aminated surface through reaction so as to form a stable structure by combining the graphene and the porous powdered quartz through amido bonds.
Detailed Description
The first embodiment:
the anticorrosive heat-insulating coating provided by the embodiment comprises the following components: 50-60 parts of purified water; 1-2 parts of a film-forming assistant; 2-3 parts of a preservative; 5-10 parts of talcum powder; 1-2 parts of a dispersant; 0.1-0.2 part by weight of defoaming agent; 5-10 parts of porous powder quartz; 5-10 parts of heavy calcium carbonate; 30-50 parts of styrene-acrylic emulsion; 5-10 parts of hollow glass beads; 0.1-0.2 parts of graphene.
The preparation method of the anticorrosive heat-insulating coating provided by the embodiment comprises the following steps:
s1: uniformly stirring purified water, a film forming auxiliary agent, a preservative and a dispersing agent;
s2: adding talcum powder, a defoaming agent, porous powder quartz, heavy calcium carbonate, hollow glass beads and graphene into S1 under high-speed stirring, controlling the particle size to be below 50 mu m, and finally adding styrene-acrylic emulsion to form a finished product.
| Corrosion resistance | Thermal insulation | Antistatic properties | |
| Experimental example 1 | Qualified | Qualified | Low resistivity and no static electricity |
| Experimental example 4 | Qualified | Qualified | Low resistivity and no static electricity |
| Experimental example 5 | Qualified | Qualified | Low resistivity and no static electricity |
| Comparative example | Qualified | Qualified | High resistivity and static electricity |
Second embodiment:
the graphene of the embodiment is loaded on the porous powder quartz, and the graphene is loaded on the porous powder quartz in a sintering mode.
The method comprises the following steps that graphene is loaded on porous powder quartz, and the graphene is loaded on the porous powder quartz in a sintering mode; the method comprises the following steps: mixing graphene powder and porous quartz powder, filling the mixture into a mold, sintering the mixture in a sintering furnace at the sintering temperature of 900 ℃ under the vacuum condition, wherein the sintering pressure is 50MPa, and crushing and grinding the sintered mixture to obtain a powdery substance.
Compared with the common mixing mode, in the actual test, the resistivity errors of different detection points at multiple positions are reduced by using the graphene of the substance in the embodiment, which shows that the dispersibility of the graphene in the powder is enhanced, and the dispersibility in the coating is improved depending on the porous powder quartz.
The third embodiment:
the graphene of the embodiment is coated on the porous powder quartz, and the surface of the graphene is condensed with the porous powder quartz amide with aminated surface to form the modified material.
The graphene is coated on porous powder quartz, the porous powder quartz is surface aminated porous powder quartz, and the surface of the graphene is condensed with surface aminated porous powder quartz amide to form a material; the method comprises the following steps: obtaining graphene with oxygen-containing groups on the surface, obtaining porous powdered quartz with aminated surface, and locking the graphene with oxygen-containing groups on the surface and the porous powdered quartz with aminated surface through reaction so as to form a stable structure by combining the graphene and the porous powdered quartz through amido bonds.
The coating composition obtained in this example, the composition in the first example, has reduced errors of detection sites when testing resistivity, and this means that dispersibility is enhanced, and antistatic property does not disappear after weather resistance testing, because graphene is more stably dispersed in the coating due to formation of stable chemical bonds.
The fourth embodiment:
the film forming aid of this embodiment is at least one of benzyl alcohol, butyl cellosolve, propylene glycol phenyl ether, and dodecyl alcohol ester, and in practice, a variety of film forming aids are used, and these can be used in the coating composition of the present invention. However, three kinds of additives, i.e., benzyl alcohol, butyl cellosolve and propylene glycol phenyl ether, are preferable because they tend to form flocs in the solution and are less reproducible, and the dodecanol ester is most compatible with the solution and requires the shortest stirring time.
The preparation process of the surface aminated porous powder quartz comprises the following steps: taking ethanol as a solvent, preparing aminosilane into a solution with the concentration of 0.01mol/L, soaking the porous powder quartz into the solution, cleaning and drying after soaking for 24 hours to obtain the surface aminated porous powder quartz. The graphene oxide is prepared from the existing material or through the existing synthesis direction. For example, the reaction steps of graphene oxide and surface aminated porous powder quartz are as follows: mixing and stirring 0.1mol/L EDC and 0.1mol/L NHS aqueous solution and 1L graphene oxide dispersion liquid with the concentration of 2mg/mL for a certain time, then adding 10g of porous powder quartz with aminated surface, and stirring for 48 hours; centrifuging, washing and drying to obtain the final product.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (7)
1. An anticorrosive heat-insulating coating is characterized by comprising:
50-60 parts of purified water;
1-2 parts of a film-forming assistant;
2-3 parts of a preservative;
5-10 parts of talcum powder;
1-2 parts of a dispersant;
0.1-0.2 part by weight of defoaming agent;
5-10 parts of porous powder quartz;
5-10 parts of heavy calcium carbonate;
30-50 parts of styrene-acrylic emulsion;
5-10 parts of hollow glass beads;
0.1-0.2 parts of graphene.
2. The anticorrosive heat-insulating coating material according to claim 1,
the graphene is loaded on the porous powder quartz in a sintering mode.
3. The anticorrosive heat-insulating coating material according to claim 1,
the graphene is coated on the porous powder quartz, and the surface of the graphene is condensed with the surface aminated porous powder quartz amide to form the modified material.
4. The anticorrosive thermal insulation coating according to any one of claims 1 to 3,
the film-forming assistant is at least one of benzyl alcohol, ethylene glycol butyl ether, propylene glycol phenyl ether and dodecyl alcohol ester (the compatibility is best, and the other three have flocculation).
5. The preparation method of the anticorrosive heat-insulating coating according to claim 1, characterized by comprising the following steps:
s1: uniformly stirring purified water, a film forming auxiliary agent, a preservative and a dispersing agent;
s2: adding talcum powder, a defoaming agent, porous powder quartz, heavy calcium carbonate, hollow glass beads and graphene into S1 under high-speed stirring, controlling the particle size to be below 50 mu m, and finally adding styrene-acrylic emulsion to form a finished product.
6. The preparation method of the anticorrosive heat-insulating coating according to claim 5,
the method comprises the following steps that graphene is loaded on porous powder quartz, and the graphene is loaded on the porous powder quartz in a sintering mode; the method comprises the following steps: mixing graphene powder and porous quartz powder, filling the mixture into a mold, sintering the mixture in a sintering furnace at the sintering temperature of 900 ℃ under the vacuum condition, wherein the sintering pressure is 50MPa, and crushing and grinding the sintered mixture to obtain a powdery substance.
7. The preparation method of the anticorrosive heat-insulating coating according to claim 5,
the graphene is coated on the porous powder quartz, the porous powder quartz is surface aminated porous powder quartz, and the surface of the graphene and the surface aminated porous powder quartz amide are condensed to form a modified material; the method comprises the following steps: obtaining graphene with oxygen-containing groups on the surface, obtaining porous powdered quartz with aminated surface, and locking the graphene with oxygen-containing groups on the surface and the porous powdered quartz with aminated surface through reaction so as to form a stable structure by combining the graphene and the porous powdered quartz through amido bonds.
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| US20140199551A1 (en) * | 2013-01-16 | 2014-07-17 | Scott Lewit | Co-cured gel coats, elastomeric coatings, structural layers, and in-mold processes for their use |
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