CN113831835A - Heat insulation coating and preparation method thereof - Google Patents
Heat insulation coating and preparation method thereof Download PDFInfo
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- C09D5/18—Fireproof paints including high temperature resistant paints
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Abstract
The invention provides a heat insulation coating and a preparation method thereof, wherein the heat insulation coating comprises, by weight, 10-20 parts of a nano silicate inorganic binder, 15-20 parts of an organic silicon modified solution, 10-15 parts of fumed silica gel, 25-35 parts of nano hollow microspheres, 5-15 parts of inorganic hollow fiber powder, 2-8 parts of nano rare earth oxide, 1-5 parts of an auxiliary agent and 0.5 part of water. The heat-insulating and heat-preserving coating provided by the invention has the advantages of excellent heat-insulating property, low heat conductivity, corrosion resistance, impact resistance, fire resistance, water resistance, simple and convenient construction and strong adhesion with a coke oven body through the synergistic effect of the organic silicon modified solution and other components.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a heat insulation coating and a preparation method thereof.
Background
The coke oven is a complex industrial kiln, and has huge energy consumption. The heat utilization efficiency of each coke oven is about 76 percent, so that 24 percent of heat is not utilized; the heat wasted by the surface heat dissipation of the coke oven accounts for about 11 percent of the unused heat; the heat dissipation on the surface of the coke oven only causes the waste of energy and also causes heat pollution.
The surface heat dissipation of the coke oven is caused by the operation process, such as the heat dissipation caused by the opening of an oven door in the coke oven top area, the combustion chamber area, the oven bottom area and the heat accumulation chamber area and the coke pushing operation process; on the other hand, the heat dissipation is caused by the heat dissipation of the coke oven body; after the coke oven body is subjected to heat insulation and preservation, the heat dissipation of the surface of the coke oven body can be reduced by more than 1 percent, the heat efficiency of the coke oven can be greatly improved, the heat dissipation of the surface of the coke oven body is reduced, and the operating environment of workers is improved.
Coating inorganic high-temperature-resistant paint is a common method for insulating heat of a coke oven body at present; the inorganic high-temperature resistant coating is a coating using an inorganic material as a main film forming substance, and the inorganic polymer coating which consists of an inorganic polymer, a metal subjected to dispersion and activation, a metal oxide nano material and rare earth ultrafine powder can quickly react with iron atoms on the surface of a steel structure to generate an inorganic polymer anticorrosive coating which has physical and chemical double protection effects and is firmly combined with a substrate through a chemical bond. Compared with organic high-temperature resistant coatings, the inorganic high-temperature resistant coatings are usually directly obtained from the natural world, most of the inorganic high-temperature resistant coatings are nontoxic inorganic raw materials, the inorganic high-temperature resistant materials have little pollution to the environment in the production and use processes, and most of the products take water as a dispersion medium and have no adverse effect on the environment and health; however, the existing inorganic high-temperature resistant coating has poor adhesion with a coke oven body, and influences the heat insulation effect.
Disclosure of Invention
The invention solves the problem that the existing heat-insulating coating has poor adhesive force with a coke oven body.
In order to solve the problems, the invention provides a heat insulation coating which comprises, by weight, 10-20 parts of a nano silicate inorganic binder, 15-20 parts of an organic silicon modified solution, 10-15 parts of fumed silica gel, 25-35 parts of nano hollow microspheres, 5-15 parts of inorganic hollow fiber powder, 2-8 parts of nano rare earth oxide, 1-5 parts of an auxiliary agent and 0.5 part of water.
Optionally, the silicone modifying solution comprises a copolymer of a silicone monomer and a tetrafluoroethylene monomer.
Optionally, the nano silicate inorganic binder is selected from at least one of nano silica sol and nano potassium silicate.
Optionally, the nano hollow micro-beads are subjected to in-situ modification and coating by neodymium nitrate and nickel nitrate.
Optionally, the inorganic hollow fiber powder is selected from at least one of boron hollow fiber powder, zirconium hollow fiber powder and mullite hollow fiber powder.
Optionally, the nano rare earth oxide is selected from at least one of yttrium oxide and cerium oxide.
Another object of the present invention is to provide a method for preparing the thermal insulation coating, which comprises the following steps:
s1: preparing an organic silicon modified solution;
s2: preparing nano hollow micro-beads;
s3: preparing fumed silica gel;
s4: adding 25-35 parts of the nano hollow microspheres into 15-20 parts of the organic silicon modified solution according to parts by weight, and uniformly mixing to obtain a solution A;
s5: according to the weight parts, 10-20 parts of nano silicate inorganic binder, 10-15 parts of fumed silica gel, 5-15 parts of inorganic hollow fiber powder, 2-8 parts of nano rare earth oxide, 1-5 parts of auxiliary agent and 0.5 part of water are added into the solution A and uniformly mixed, and the heat insulation coating is obtained.
Optionally, step S1 includes: according to the weight portion, 1.5 portions of organic silicon monomer and 1 portion of tetrafluoroethylene monomer are polymerized at 85 ℃ to obtain the organic silicon modified solution.
Optionally, step S2 includes:
s21: mixing 1-5 parts by weight of a stabilizer and 1-5 parts by weight of ethanol to obtain a solution B;
s22: adding 15-25 parts of nano hollow microspheres into the solution B according to the parts by weight, and uniformly mixing to obtain a solution C;
s23: adding 1-5 parts of neodymium nitrate and 1-5 parts of nickel nitrate into the solution C according to parts by weight, heating to 30-35 ℃, and uniformly mixing to obtain a dispersion liquid;
s24: and sequentially filtering, cleaning and drying the dispersion liquid, and sintering at 600-900 ℃ for 2-5 h to obtain the nano hollow microspheres.
Optionally, step S3 includes:
s31: adding 1-10 parts by weight of deionized water into 0.1-0.5 part by weight of wetting agent, and uniformly mixing to obtain a solution D;
s32: adding 1-10 parts by weight of deionized water into 0.1-0.5 part by weight of dispersant, and uniformly mixing to obtain a solution E;
s33: adding 5-15 parts by weight of fumed silica gel into the solution D, adding 0.01-0.1 part by weight of defoaming agent, and uniformly mixing to obtain a solution F;
s34: and adding the solution E into the solution F, and uniformly mixing to obtain the modified fumed silica gel dispersion.
Compared with the prior art, the heat insulation coating provided by the invention has the following advantages:
the heat-insulating and heat-preserving coating provided by the invention has the advantages of excellent heat-insulating property, low heat conductivity, corrosion resistance, impact resistance, fire resistance, water resistance, simple and convenient construction and strong adhesion with a coke oven body through the synergistic effect of the organic silicon modified solution and other components.
Detailed Description
The following describes embodiments of the present invention in detail. The embodiments described below are exemplary and are intended to be illustrative of the present invention and should not be construed as limiting the present invention, and all other embodiments that can be obtained by one of ordinary skill in the art based on the embodiments of the present invention without inventive step fall within the scope of the present invention.
The invention provides a heat insulation coating, aiming at solving the problem of poor adhesive force between the existing heat insulation coating and a coke oven body, and the heat insulation coating comprises, by weight, 10-20 parts of a nano silicate inorganic binder, 15-20 parts of an organic silicon modified solution, 10-15 parts of fumed silica gel, 25-35 parts of nano hollow microspheres, 5-15 parts of inorganic hollow fiber powder, 2-8 parts of nano rare earth oxide, 1-5 parts of an auxiliary agent and 0.5 part of water.
Wherein the nano silicate inorganic adhesive is used for improving the binding force among all components of the heat-insulating and heat-preserving paint and between the heat-insulating and heat-preserving paint and a coke oven body; the nano silicate inorganic binder is preferably selected from at least one of nano silica sol and nano potassium silicate.
The fumed silica gel has a fine nano-network structure, and the nano-network structure effectively limits the propagation of local thermal excitation in the thermal insulation coating, so that the thermal insulation performance of the thermal insulation coating is improved.
According to the heat insulation and preservation coating, a large number of nano hollow microspheres are added, so that on one hand, the advantages of small density, light weight, low heat conduction and good heat insulation performance of the nano hollow microspheres are utilized, and the heat insulation and preservation performance of the heat insulation and preservation coating is improved; on the other hand, compared with solid microbeads, the nano hollow microbeads are easier to move in the heat insulation coating, so that the coating difficulty can be reduced, and the construction difficulty can be reduced; inert gas can be filled in the nano hollow microspheres so as to further improve the heat insulation performance of the heat insulation coating.
In addition, in the heat insulation coating, gaps exist between adjacent nano hollow microspheres; the gaps can form heat convection units at the same time, so that the thermal conductivity of the thermal insulation coating is lower, and the thermal insulation effect is further improved.
Similarly, the inorganic hollow fiber powder has the characteristic of a hollow structure and low heat conductivity, and the hollow structure can be further filled with air or inert gas, so that the heat insulation performance is further improved; the inorganic hollow fiber powder is preferably selected from at least one of boron hollow fiber powder, zirconium hollow fiber powder and mullite hollow fiber powder.
According to the application, the nanometer rare earth oxide is added, and the excellent heat reflection performance of the nanometer rare earth oxide is utilized, so that the nanometer rare earth oxide and gas-phase silica gel, nanometer hollow microspheres and inorganic hollow fiber powder in the heat insulation coating are in synergistic effect, and after part of heat is reflected by the nanometer rare earth oxide, heat conduction is further carried out on the heat through other components, so that the heat insulation performance is improved; the application prefers that the nano rare earth oxide is selected from at least one of yttrium oxide and cerium oxide.
The performance of the heat-insulating and heat-preserving coating is further optimized by adding corresponding auxiliary agents; the application prefers that the auxiliary agent is selected from at least one of an emulsifier, a defoaming agent and a dispersing agent; the emulsifier, the defoamer and the dispersant can be selected from the emulsifiers, the defoamers and the dispersants which are available in the prior art, and the emulsifier is preferably alkyl polyoxyethylene ether, the defoamer is a polyether defoamer, and the dispersant is preferably a modified polyether compound.
In order to further improve the adhesive force between the heat insulation coating and the coke oven body, the heat insulation coating provided by the application also comprises an organic silicon modified solution, and a space net structure is formed by the organic silicon modified solution, on one hand, the organic silicon modified solution forms a continuous film in the sintering process and uniformly coats the nano hollow microspheres to improve the density of the coating, and on the other hand, the heat insulation coating is easier to permeate into a refractory material interface to form an interface transition layer, so that the adhesive force between the heat insulation coating and the coke oven body is increased.
The heat-insulating and heat-preserving coating provided by the invention has the advantages of excellent heat-insulating property, low heat conductivity, corrosion resistance, impact resistance, fire resistance, water resistance, simple and convenient construction and strong adhesion with a coke oven body through the synergistic effect of the organic silicon modified solution and other components.
Specifically, the organic silicon modified solution preferably comprises a copolymer of an organic silicon monomer and a tetrafluoroethylene monomer, and a hybrid monomer is prepared by copolymerization of the organic silicon monomer and the tetrafluoroethylene monomer, so that O-Si-O forms more covalent bonds and ionic bonds, a space net structure is formed, the density of the coating is improved, the thermal insulation coating is easier to permeate into a fire-resistant material interface, an interface transition layer is formed, and the adhesive force between the thermal insulation coating and a coke oven body is increased.
The application preferably selects the nano hollow micro-beads from at least one of nano ceramic hollow micro-beads and nano glass hollow micro-beads, and the particle size range of the nano hollow micro-beads is preferably 50-200 mu m; furthermore, the nanometer hollow micro-beads are preferably subjected to in-situ modification and coating by neodymium nitrate and nickel nitrate, namely, the neodymium nitrate and the nickel nitrate are coated on the outer sides of the nanometer hollow micro-beads, so that oxides are formed on the outer sides of the nanometer hollow micro-beads in the sintering process, and the heat insulation performance is further improved.
Another object of the present invention is to provide a method for preparing the thermal insulation coating, which comprises the following steps:
s1: preparing an organic silicon modified solution;
s2: preparing nano hollow micro-beads;
s3: preparing fumed silica gel;
s4: adding 25-35 parts of nano hollow microspheres into 15-20 parts of organic silicon modified solution according to parts by weight, and uniformly mixing to obtain solution A;
s5: according to the weight parts, 10-20 parts of nano silicate inorganic binder, 10-15 parts of fumed silica gel, 5-15 parts of inorganic hollow fiber powder, 2-8 parts of nano rare earth oxide, 1-5 parts of auxiliary agent and 0.5 part of water are added into the solution A, and the mixture is uniformly mixed to obtain the heat-insulating and heat-preserving coating.
According to the heat insulation coating provided by the application, firstly, the prepared nano hollow microspheres and the organic silicon modified solution are fully mixed, so that the organic silicon modified solution can uniformly coat the nano hollow microspheres to obtain a solution A; and the prepared thermal insulation coating has excellent thermal insulation performance, and simultaneously has the advantages of low thermal conductivity, corrosion resistance, impact resistance, fire resistance, water resistance, simple and convenient construction and strong adhesive force with a coke oven body.
Specifically, step S1 in the present application includes: according to the weight portion, 1.5 portions of organic silicon monomer and 1 portion of tetrafluoroethylene monomer are polymerized at 85 ℃ to obtain organic silicon modified solution.
The preferred organosilicon monomer herein is a methyl monomer (methylchlorosilane).
Step S2 in the present application includes:
s21: mixing 1-5 parts by weight of a stabilizer and 1-5 parts by weight of ethanol to obtain a solution B;
s22: adding 15-25 parts of nano hollow microspheres into the solution B according to the parts by weight, and uniformly mixing to obtain a solution C;
s23: adding 1-5 parts of neodymium nitrate and 1-5 parts of nickel nitrate into the solution C according to parts by weight, heating to 30-35 ℃, and uniformly mixing to obtain a dispersion liquid;
s24: sequentially filtering, cleaning and drying the dispersion liquid, and sintering at 600-900 ℃ for 2-5 h to obtain the nano hollow microspheres; the nanometer hollow microsphere is the nanometer hollow microsphere which is in-situ decorated and coated by neodymium nitrate and nickel nitrate.
The stabilizer in the present application is preferably a BN-1000 stabilizer, i.e. preferably the stabilizer is a yttrium nitrate mixture based stabilizer.
For reducing the construction degree of difficulty of thermal-insulated heat preservation coating, be convenient for scribble this thermal-insulated heat preservation coating, the preferred fumed silica gel of this application is the prefabricated dispersion of modification, and is specific, step S3 includes in this application:
s31: adding 1-10 parts by weight of deionized water into 0.1-0.5 part by weight of wetting agent, and uniformly mixing to obtain a solution D;
s32: adding 1-10 parts by weight of deionized water into 0.1-0.5 part by weight of dispersant, and uniformly mixing to obtain a solution E;
s33: adding 5-15 parts by weight of fumed silica gel into the solution D, adding 0.01-0.1 part by weight of defoaming agent, and uniformly mixing to obtain a solution F;
s34: and adding the solution E into the solution F, and uniformly mixing to obtain the modified fumed silica gel dispersion.
In the present application, it is preferable that the wetting agent in the above step is a DTH wetting agent, i.e., a trimethyl ammonium bromide wetting agent, the dispersing agent is a BHW dispersing agent, i.e., propylene glycol methyl ether acetate, and the defoaming agent is a polyether defoaming agent.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, specific embodiments thereof are described in detail below.
Example 1
The embodiment provides a preparation method of a heat insulation coating, which comprises the following steps:
s1: according to the weight portion, 1.5 portions of methyl monomer and 1 portion of tetrafluoroethylene monomer are polymerized at 85 ℃ to obtain organic silicon modified solution;
s21: mixing 1 part of BN-1000 stabilizer and 5 parts of ethanol according to parts by weight to obtain a solution B;
s22: adding 15 parts of nano ceramic hollow microspheres into the solution B according to the parts by weight, and uniformly mixing to obtain a solution C;
s23: adding 1 part of neodymium nitrate and 5 parts of nickel nitrate into the solution C according to parts by weight, heating to 30 ℃, and uniformly mixing to obtain a dispersion liquid;
s24: sequentially filtering, cleaning and drying the dispersion liquid, and sintering at 600 ℃ for 5 hours to obtain the nano hollow microspheres; the nanometer hollow microsphere is the nanometer hollow microsphere which is in-situ decorated and coated by neodymium nitrate and nickel nitrate;
s31: adding 10 parts by weight of deionized water into 0.1 part by weight of wetting agent, and uniformly mixing to obtain a solution D;
s32: adding 1 part of deionized water into 0.5 part of dispersing agent according to the parts by weight, and uniformly mixing to obtain a solution E;
s33: adding 5 parts by weight of fumed silica gel into the solution D, adding 0.01 part by weight of defoaming agent, and uniformly mixing to obtain a solution F;
s34: adding the solution E into the solution F, and uniformly mixing to obtain a modified gas-phase silicon dioxide gel dispersion liquid;
s4: adding 25 parts of nano hollow microspheres into 15 parts of organic silicon modified solution according to parts by weight, and uniformly mixing to obtain solution A;
s5: according to the weight parts, 10 parts of nano silica sol inorganic adhesive, 10 parts of fumed silica gel, 15 parts of boron hollow fiber powder, 2 parts of nano yttrium oxide, 1 part of alkyl polyoxyethylene ether, 1 part of polyether defoamer, 1 part of modified polyether compound dispersant and 0.5 part of water are added into the solution A and uniformly mixed to obtain the heat-insulating and heat-preserving coating.
The obtained heat-insulating coating is coated on the coke oven body, so that the coating difficulty is low, and the coating is easy; the thickness of the coating is 2 mm; and the coating is subjected to performance tests, and the test results are shown in table 1.
Example 2
The embodiment provides a preparation method of a heat insulation coating, which comprises the following steps:
s1: according to the weight portion, 1.5 portions of methyl monomer and 1 portion of tetrafluoroethylene monomer are polymerized at 85 ℃ to obtain organic silicon modified solution;
s21: mixing 5 parts of BN-1000 stabilizer and 1 part of ethanol according to parts by weight to obtain a solution B;
s22: adding 25 parts by weight of nano ceramic hollow microspheres into the solution B, and uniformly mixing to obtain a solution C;
s23: adding 5 parts of neodymium nitrate and 1 part of nickel nitrate into the solution C according to parts by weight, heating to 35 ℃, and uniformly mixing to obtain a dispersion liquid;
s24: sequentially filtering, cleaning and drying the dispersion liquid, and sintering at 900 ℃ for 3h to obtain the nano hollow microspheres; the nanometer hollow microsphere is the nanometer hollow microsphere which is in-situ decorated and coated by neodymium nitrate and nickel nitrate;
s31: adding 1 part of deionized water into 0.5 part of wetting agent according to the parts by weight, and uniformly mixing to obtain a solution D;
s32: adding 10 parts by weight of deionized water into 0.1 part by weight of dispersing agent, and uniformly mixing to obtain a solution E;
s33: adding 15 parts of fumed silica gel into the solution D according to the parts by weight, adding 0.1 part of defoaming agent, and uniformly mixing to obtain a solution F;
s34: adding the solution E into the solution F, and uniformly mixing to obtain a modified gas-phase silicon dioxide gel dispersion liquid;
s4: adding 35 parts of nano hollow microspheres into 20 parts of organic silicon modified solution according to parts by weight, and uniformly mixing to obtain solution A;
s5: according to the weight parts, 20 parts of nano silica sol inorganic adhesive, 10 parts of fumed silica gel, 15 parts of zirconium hollow fiber powder, 8 parts of nano yttrium oxide, 1 part of alkyl polyoxyethylene ether, 1 part of polyether defoamer, 1 part of modified polyether compound dispersant and 0.5 part of water are added into the solution A and uniformly mixed to obtain the heat-insulating and heat-preserving coating.
The obtained heat-insulating coating is coated on the coke oven body, so that the coating difficulty is low, and the coating is easy; the thickness of the coating is 2 mm; and the coating is subjected to performance tests, and the test results are shown in table 1.
Example 3
The embodiment provides a preparation method of a heat insulation coating, which comprises the following steps:
s1: according to the weight portion, 1.5 portions of organic silicon monomer and 1 portion of tetrafluoroethylene monomer are polymerized at 85 ℃ to obtain organic silicon modified solution;
s21: mixing 3 parts of BN-1000 stabilizer and 3 parts of ethanol according to parts by weight to obtain a solution B;
s22: adding 20 parts of nano ceramic hollow microspheres into the solution B according to the parts by weight, and uniformly mixing to obtain a solution C;
s23: adding 3 parts of neodymium nitrate and 3 parts of nickel nitrate into the solution C according to parts by weight, heating to 33 ℃, and uniformly mixing to obtain a dispersion liquid;
s24: sequentially filtering, cleaning and drying the dispersion liquid, and sintering at 800 ℃ for 3h to obtain the nano hollow microspheres; the nanometer hollow microsphere is the nanometer hollow microsphere which is in-situ decorated and coated by neodymium nitrate and nickel nitrate;
s31: adding 5 parts by weight of deionized water into 0.3 part by weight of wetting agent, and uniformly mixing to obtain a solution D;
s32: adding 5 parts by weight of deionized water into 0.3 part by weight of dispersing agent, and uniformly mixing to obtain a solution E;
s33: adding 10 parts by weight of fumed silica gel into the solution D, adding 0.3 part by weight of defoaming agent, and uniformly mixing to obtain a solution F;
s34: adding the solution E into the solution F, and uniformly mixing to obtain a modified gas-phase silicon dioxide gel dispersion liquid;
s4: adding 30 parts of nano hollow microspheres into 28 parts of organic silicon modified solution according to parts by weight, and uniformly mixing to obtain solution A;
s5: according to the weight parts, 15 parts of nano silica sol inorganic adhesive, 13 parts of fumed silica gel, 10 parts of mullite hollow fiber powder, 5 parts of nano cerium oxide, 1 part of alkyl polyoxyethylene ether, 1 part of polyether defoamer, 1 part of modified polyether compound dispersant and 0.5 part of water are added into the solution A and uniformly mixed to obtain the heat-insulating and heat-preserving coating.
The obtained heat-insulating coating is coated on the coke oven body, so that the coating difficulty is low, and the coating is easy; the thickness of the coating is 2 mm; and the coating is subjected to performance tests, and the test results are shown in table 1.
Comparative example 1
The comparative example was run without the silicone modifying solution and the remaining steps were the same as in example 3.
The obtained heat-insulating coating is coated on the coke oven body, so that the coating difficulty is low, and the coating is easy; the thickness of the coating is 2 mm; and the coating is subjected to performance tests, and the test results are shown in table 1.
Comparative example 2
The nano ceramic hollow microspheres in the comparative example are not coated with neodymium nitrate and nickel nitrate in-situ modification, so that the coating difficulty is low and the coating is easy; the rest is the same as in example 3.
The obtained heat-insulating coating is coated on the coke oven body, so that the coating difficulty is low, and the coating is easy; the thickness of the coating is 2 mm; and the coating is subjected to performance tests, and the test results are shown in table 1.
Comparative example 3
The fumed silica gel in this comparative example was not prepared as a modified dispersion, and the rest was the same as in example 3.
The obtained heat-insulating coating is coated on the coke oven body, so that the coating difficulty is high and the coating is difficult; the thickness of the coating is 2 mm; and the coating is subjected to performance tests, and the test results are shown in table 1.
TABLE 1
According to the data, the thermal insulation coating provided by the application has excellent thermal insulation performance under the synergistic effect of the components, and the temperature resistance range is-90-2000 ℃; the coating obtained by the heat-insulating coating has the advantages of easy coating, low heat conductivity, good wear resistance, high bonding strength with a coke oven body and good adhesive force; and is optimized for the coating performance in example 3.
Compared with the embodiment 3, the organic silicon modified solution is not added in the comparative example 1, so that the adhesive force between the obtained coating and the coke oven body is obviously reduced; compared with the embodiment 3, the nano hollow microspheres in the comparative example 2 are not coated in situ, and the wear resistance and the heat insulation performance of the coating obtained by the comparative example are reduced; compared with the embodiment 3, the fumed silica gel is not prefabricated into the modified dispersion liquid, so that the coating difficulty is higher, and the construction difficulty is increased; and the coatings obtained in comparative examples 1 to 3 have reduced heat insulation and preservation capabilities.
In conclusion, the heat-insulating and heat-preserving coating provided by the invention has the advantages of excellent heat-insulating property, low heat conductivity, corrosion resistance, impact resistance, fire resistance, water resistance, simple and convenient construction and strong adhesion with a coke oven body through the synergistic effect of the components.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.
Claims (10)
1. The heat insulation coating is characterized by comprising, by weight, 10-20 parts of a nano silicate inorganic binder, 15-20 parts of an organic silicon modified solution, 10-15 parts of fumed silica gel, 25-35 parts of nano hollow microspheres, 5-15 parts of inorganic hollow fiber powder, 2-8 parts of nano rare earth oxide, 1-5 parts of an auxiliary agent and 0.5 part of water.
2. The thermal insulating coating of claim 1, wherein the silicone modified solution comprises a copolymer of a silicone monomer and a tetrafluoroethylene monomer.
3. The heat-insulating coating as claimed in claim 1 or 2, wherein the nano silicate inorganic binder is at least one selected from nano silica sol and nano potassium silicate.
4. The heat-insulating and heat-preserving coating as claimed in claim 1 or 2, wherein the nano hollow microspheres are in-situ modified and coated by neodymium nitrate and nickel nitrate.
5. The thermal insulating coating according to claim 1 or 2, wherein the inorganic hollow fiber powder is at least one selected from the group consisting of boron hollow fiber powder, zirconium hollow fiber powder, and mullite hollow fiber powder.
6. The thermal insulation coating material according to claim 1 or 2, wherein the nano rare earth oxide is at least one selected from yttrium oxide and cerium oxide.
7. A preparation method of the heat insulation coating as claimed in any one of claims 1 to 6, characterized by comprising the following steps:
s1: preparing an organic silicon modified solution;
s2: preparing nano hollow micro-beads;
s3: preparing fumed silica gel;
s4: adding 25-35 parts of the nano hollow microspheres into 15-20 parts of the organic silicon modified solution according to parts by weight, and uniformly mixing to obtain a solution A;
s5: according to the weight parts, 10-20 parts of nano silicate inorganic binder, 10-15 parts of fumed silica gel, 5-15 parts of inorganic hollow fiber powder, 2-8 parts of nano rare earth oxide, 1-5 parts of auxiliary agent and 0.5 part of water are added into the solution A and uniformly mixed, and the heat insulation coating is obtained.
8. The method for preparing a thermal insulation coating material according to claim 7, wherein the step S1 includes: according to the weight portion, 1.5 portions of organic silicon monomer and 1 portion of tetrafluoroethylene monomer are polymerized at 85 ℃ to obtain the organic silicon modified solution.
9. The method for preparing a thermal insulation coating material according to claim 7, wherein the step S2 includes:
s21: mixing 1-5 parts by weight of a stabilizer and 1-5 parts by weight of ethanol to obtain a solution B;
s22: adding 15-25 parts of nano hollow microspheres into the solution B according to parts by weight, and uniformly mixing to obtain a solution C;
s23: adding 1-5 parts of neodymium nitrate and 1-5 parts of nickel nitrate into the solution C according to parts by weight, heating to 30-35 ℃, and uniformly mixing to obtain a dispersion liquid;
s24: and sequentially filtering, cleaning and drying the dispersion liquid, and sintering at 600-900 ℃ for 2-5 h to obtain the nano hollow microspheres.
10. The method for preparing a thermal insulation coating material according to claim 7, wherein the step S3 includes:
s31: adding 1-10 parts by weight of deionized water into 0.1-0.5 part by weight of wetting agent, and uniformly mixing to obtain a solution D;
s32: adding 1-10 parts by weight of deionized water into 0.1-0.5 part by weight of dispersant, and uniformly mixing to obtain a solution E;
s33: adding 5-15 parts by weight of fumed silica gel into the solution D, adding 0.01-0.1 part by weight of defoaming agent, and uniformly mixing to obtain a solution F;
s34: and adding the solution E into the solution F, and uniformly mixing to obtain the modified fumed silica gel dispersion.
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| CN114790358A (en) * | 2022-06-02 | 2022-07-26 | 蚌埠圣米诺生物科技有限公司 | Rare earth fireproof coating for building walls |
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