CN111073506B - Inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating and preparation and use method thereof - Google Patents

Inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating and preparation and use method thereof Download PDF

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CN111073506B
CN111073506B CN201911398356.4A CN201911398356A CN111073506B CN 111073506 B CN111073506 B CN 111073506B CN 201911398356 A CN201911398356 A CN 201911398356A CN 111073506 B CN111073506 B CN 111073506B
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temperature
heat
organic silicon
insulating coating
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CN111073506A (en
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梁新磊
王刚
易祖耀
李娜
韩恩厚
刘亚伟
石天庆
商永强
张斌
王震宇
王帅
刘茜
常峻玮
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Institute of Metal Research of CAS
Huadian Zhengzhou Machinery Design and Research Institute Co Ltd
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Huadian Zhengzhou Machinery Design and Research Institute Co Ltd
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Abstract

The invention provides an inorganic silicon-organic silicon copolymerization temperature-resistant heat-insulating coating and a preparation method and a use method thereof, wherein the inorganic silicon-organic silicon copolymerization temperature-resistant heat-insulating coating comprises the following raw materials in parts by weight: 6.0-7.0 parts of absolute ethyl alcohol, 2.0-3.0 parts of isopropanol, 4020.0-25.0 parts of ethyl silicate, 1.0-1.5 parts of deionized water, 0.1-0.3 part of 35% hydrochloric acid and 0.3-0.5 part of zinc oxide; adding 2.5-4.0 parts of silane coupling agent into the silicate prepolymer, heating for reaction to prepare silane modified silicate prepolymer, and adding 12.0-20.0 parts of organic silicon polymer to prepare inorganic silicon-organic silicon copolymer; continuously adding 1.5-3.0 parts of silane coupling agent, 0.3-0.6 part of carbon fiber, 2.0-4.0 parts of floating aluminum powder and hollow glass beads: 30.0-40.0 parts of glass flakes, 5.0-6.0 parts of asbestos fiber powder: 3.0-4.0 parts of low-melting-point glass powder: 4.0-5.0 parts of a temperature-resistant heat-insulating coating; the hollow glass beads and the glass flakes are composite heat-insulating filler. The prepared temperature-resistant heat-insulating coating is used for a heat supply pipeline, and the temperature-resistant heat-insulating effect of the heat supply pipeline is improved.

Description

Inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating and preparation and use method thereof
Technical Field
The invention relates to the field of cooling and energy saving of a cogeneration heat supply pipeline and the like, in particular to an inorganic silicon-organic silicon copolymerization temperature-resistant heat-insulating coating and a preparation method and a use method thereof, and especially relates to an inorganic silicon-organic silicon copolymerization temperature-resistant heat-insulating coating used for energy saving of a heat supply pipeline and a preparation method and a use method thereof.
Background
The energy conservation and emission reduction is an important core for the social and economic development of China, and emphasizes the implementation of the industrialization demonstration of energy-saving technical equipment. The country encourages the development of cogeneration technology, and in recent years, the development of domestic heat supply transformation project is rapid, and heat supply pipeline uses more and more, and the distance is more and more far away, and the research of heat supply pipeline energy-conserving correlation technique is still in more preliminary stage, needs to carry out comprehensive upgrading to traditional heat preservation technique urgently. The high-efficiency temperature-resistant heat-insulating coating can prevent the surface of the equipment pipeline from being oxidized, and plays a role in cooling and energy saving, so that the energy-saving heat-insulating material technology of the heat supply pipeline is related to the operation benefit and safety of the whole heat supply system. Conventionally used heat insulating materials have low heat insulating efficiency, high operation and maintenance costs, and cause loss and safety problems, and development of high-efficiency heat insulating coatings is required to improve the use heat efficiency. At present, the heat-insulating and energy-saving coating is required to be developed towards integration of high-efficiency heat insulation and anticorrosion protection; meanwhile, the radiation heat transfer and the convection heat transfer are reduced under the synergistic effect of multiple heat insulation modes. The inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating is prepared by modifying the silicon dioxide active intermediate and organic silicon, the corrosion resistance, the flexibility and the bonding strength of the coating are improved, and meanwhile, the coating still has excellent heat resistance, and a heat-insulating coating mode combining a barrier type and a reflection type is adopted.
The invention solves the energy-saving problem of the heat supply pipeline, ensures the safe and economic operation of production, and saves the maintenance cost and the shutdown loss. Along with the needs of our country for economic high-speed development and conservation-oriented society, the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating plays an important role.
Disclosure of Invention
In order to solve the problems, the invention provides an inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating and a preparation method and a use method thereof.
The object of the invention is achieved in the following way: the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating comprises the following raw materials in parts by weight: 6.0-7.0 parts of absolute ethyl alcohol, 2.0-3.0 parts of isopropanol, 4020.0-25.0 parts of ethyl silicate, 1.0-1.5 parts of deionized water, 0.1-0.3 part of 35% hydrochloric acid and 0.3-0.5 part of zinc oxide; adding 2.5-4.0 parts of silane coupling agent into the silicate prepolymer, heating for reaction to prepare silane modified silicate prepolymer, and adding 12.0-20.0 parts of organic silicon polymer to prepare inorganic silicon-organic silicon copolymer; continuously adding 1.5-3.0 parts of silane coupling agent, 0.3-0.6 part of carbon fiber, 2.0-4.0 parts of floating aluminum powder and hollow glass beads: 30.0-40.0 parts of glass flakes, 5.0-6.0 parts of asbestos fiber powder: 3.0-4.0 parts of low-melting-point glass powder: 4.0-5.0 parts of a temperature-resistant heat-insulating coating; the hollow glass beads and the glass flakes are composite heat-insulating filler.
The silane coupling agent is phenyl trimethoxy silane, vinyl triethoxy silane and gamma-glycidyl ether oxygen propyl trimethoxy silane.
The hollow glass beads are 200-mesh hollow glass beads, 100-mesh hollow glass beads and 60-mesh hollow glass beads, and the glass flakes are 325-mesh glass flakes.
A preparation method of inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating comprises the following steps:
(1): anhydrous ethanol: 6.0-7.0 parts; isopropyl alcohol: 2.0-3.0 parts; ethyl silicate-40: 20.0-25.0 parts; stirring the components at a medium speed for 10-20 minutes to obtain a mixture A;
(2): deionized water: 1.0-1.5 parts; 35% by mass of hydrochloric acid: 0.1-0.3 part; zinc oxide: 0.3-0.5 part; the three components are mixed and stirred evenly to obtain a mixture B; adding the mixture B into the mixture A under the condition of stirring at medium speed, and standing for 30-50 minutes to obtain a mixture C;
(3) firstly, the mixture C is subjected to heat preservation reaction at 50-70 ℃ for 30-60 minutes, then 2.5-4.0 parts of silane coupling agent is added, and the reaction is carried out at 70-80 ℃ for 30-50 minutes to prepare silane modified silicate prepolymer; adding 12.0-20.0 parts of organic silicon polymer into the prepolymer for reaction to prepare inorganic silicon-organic silicon copolymer, wherein the reaction temperature is as follows: and (3) at 70-80 ℃, reaction time: 30-60 minutes;
(3): then adding silane coupling agent in (2): 1.5-3.0 parts of carbon fiber: 0.3-0.6 part, 5.0-6.0 parts of glass flakes, and floating aluminum powder: 2.0-4.0 parts of hollow glass beads: 30.0-40.0 parts of asbestos fiber powder: 3.0-4.0 parts of low-melting-point glass powder: 4.0-5.0 parts; stirring and dispersing for 20-40 minutes at 200-300 rpm by using a stirrer to prepare the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating.
The application method of the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating comprises the steps of brushing, blade coating or pouring the temperature-resistant heat-insulating coating on a heat supply pipeline, curing for 120-240 hours at 15-100 ℃, and curing to be used as the temperature-resistant heat-insulating coating.
Has the advantages that:
1. the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulation coating prepared by the invention can be used on a cogeneration high-temperature heat supply pipeline for a long time, has the advantages of high efficiency, heat insulation, high temperature resistance, energy conservation, consumption reduction and the like, and has the advantages of cold and hot impact damage resistance, long-term application in a corrosive environment and the like.
2. The invention generates a silicon dioxide active intermediate with a certain degree of polymerization and rich hydroxyl on the surface by controlling the sol-gel process of tetraethoxysilane, and the silicon dioxide active intermediate is further reacted with organic silicon molecules to generate SiO through crosslinking2Organosilicon copolymer, and then silane coupling agent is adopted to react with active groups such as residual hydroxyl groups on the copolymer to improve heat resistance, flexibility and corrosion resistance. The special coating is a novel material integrating multiple functions of heat insulation, temperature reduction, energy conservation, consumption reduction, corrosion resistance and the like.
The traditional ethyl orthosilicate sol-gel method is easy to crack because of uneven tension on a film forming material in the film forming process; if the hydrolysis is insufficient, the film formation is not continuous and the water resistance is poor. The invention adopts the organic silicon resin with better toughness and the nano inorganic silicon film generated by sol-gel to compound and improve the mechanical destruction resistance, and adopts the reaction of the silane coupling agent and the nano inorganic silicon to improve the overall water resistance of the coating.
The invention defines the adding condition of hydrochloric acid for hydrolyzing ethyl silicate to form a film, the hydrolysis temperature and the standing time for forming the film by silica sol, the time and the temperature for reacting the silica sol with a silane coupling agent, and the time and the temperature for reacting with an organic silicon polymer, and provides an optimized chemical reaction condition favorable for film forming performance.
3. The invention adopts the compound use of hollow glass beads, glass flakes and aluminum powder to insulate heat. The heat-insulating coating adopts a heat-insulating buffer layer heat-insulating mode that hollow microspheres with different grain sizes are combined and arranged in a multistage mode in a heat-insulating coating, and a multi-interface reflecting structure of a reflecting material and the hollow beads. When the hollow glass beads are used independently, gaps exist among the particles, the compactness of a formed coating is low, and the reflection and heat insulation effects of the beads are weak due to strong heat radiation; when the composite flaky heat insulation filler is used, a coating film is more compact, and the reflective heat insulation performance is enhanced.
Different from the traditional organosilicon temperature-resistant coating, the invention has the advantages of temperature resistance and heat insulation performance, and can still maintain good heat insulation performance in corrosive environment.
4. The inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating can be used as an energy-saving heat-insulating coating after being maintained for 120-240 hours at 15-100 ℃ by adopting brush coating, blade coating or casting molding. The product of the invention can be coated, cured and molded at normal temperature, and can be applied under the condition that the site can not be heated for convenient construction.
Detailed Description
The inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating comprises the following raw materials in parts by weight: 6.0-7.0 parts of absolute ethyl alcohol, 2.0-3.0 parts of isopropanol, 4020.0-25.0 parts of ethyl silicate, 1.0-1.5 parts of deionized water, 0.1-0.3 part of 35% hydrochloric acid and 0.3-0.5 part of zinc oxide; adding 2.5-4.0 parts of silane coupling agent into the silicate prepolymer, heating for reaction to prepare silane modified silicate prepolymer, and adding 12.0-20.0 parts of organic silicon polymer to prepare inorganic silicon-organic silicon copolymer; continuously adding 1.5-3.0 parts of silane coupling agent, 0.3-0.6 part of carbon fiber, 2.0-4.0 parts of floating aluminum powder and hollow glass beads: 30.0-40.0 parts of glass flakes, 5.0-6.0 parts of asbestos fiber powder: 3.0-4.0 parts of low-melting-point glass powder: 4.0-5.0 parts of a temperature-resistant heat-insulating coating; the hollow glass beads and the glass flakes are composite heat-insulating filler.
The silane coupling agent is phenyl trimethoxy silane, vinyl triethoxy silane and gamma-glycidyl ether oxygen propyl trimethoxy silane.
The hollow glass beads are 200-mesh hollow glass beads, 100-mesh hollow glass beads and 60-mesh hollow glass beads, and the glass flakes are 325-mesh glass flakes.
The silicone polymer may be a methylphenyl silicone resin.
A preparation method of inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating comprises the following steps:
(1): anhydrous ethanol: 6.0-7.0 parts; isopropyl alcohol: 2.0-3.0 parts; ethyl silicate-40: 20.0-25.0 parts; stirring the components at a medium speed for 10-20 minutes to obtain a mixture A;
(2): deionized water: 1.0-1.5 parts; 35% by mass of hydrochloric acid: 0.1-0.3 part; zinc oxide: 0.3-0.5 part; the three components are mixed and stirred evenly to obtain a mixture B; adding the mixture B into the mixture A under the condition of stirring at medium speed, and standing for 30-50 minutes to obtain a mixture C; the placement is mainly to hydrolyze the ethyl silicate under the action of acid catalysis for a period of time.
(3) Firstly, the mixture C is subjected to heat preservation reaction at 50-70 ℃ for 30-60 minutes, then 2.5-4.0 parts of silane coupling agent is added, and the reaction is carried out at 70-80 ℃ for 30-50 minutes to prepare silane modified silicate prepolymer; adding 12.0-20.0 parts of organic silicon polymer into the prepolymer for reaction to prepare inorganic silicon-organic silicon copolymer, wherein the reaction temperature is as follows: and (3) at 70-80 ℃, reaction time: 30-60 minutes;
(4): then adding silane coupling agent in (2): 1.5-3.0 parts of carbon fiber: 0.3-0.6 part, 5.0-6.0 parts of glass flakes, and floating aluminum powder: 2.0-4.0 parts of hollow glass beads: 30.0-40.0 parts of asbestos fiber powder: 3.0-4.0 parts of low-melting-point glass powder: 4.0-5.0 parts; stirring and dispersing for 20-40 minutes at 200-300 rpm by using a stirrer to prepare the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating.
The application method of the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating comprises the steps of brushing, blade coating or pouring the temperature-resistant heat-insulating coating on a heat supply pipeline, curing for 120-240 hours at 15-100 ℃, and curing to be used as the temperature-resistant heat-insulating coating.
The inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating prepared by the method can be constructed in the modes of brushing, blade coating, pouring and the like, is high-efficiency heat-insulating, can resist the temperature of 400 ℃, resists cold and hot impact, and is strong in binding force with a metal base material.
The present invention will be described in further detail below with reference to examples.
Example 1
In the embodiment, the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating for energy conservation of the heat supply pipeline comprises the following specific formula in parts by weight:
7.0 parts of absolute ethyl alcohol, 3.0 parts of isopropanol, 4023.5 parts of ethyl silicate and deionized water: 1.4 parts of hydrochloric acid with the mass fraction of 35%, 0.2 part of zinc oxide and 2.5 parts of phenyl trimethoxy silane coupling agent, wherein the components are silane modified silicate prepolymer; 12.0 parts of W991-6 organic silicon resin, 1.5 parts of gamma-glycidyl ether oxypropyl trimethoxy silane and carbon fiber: 0.5 part, 5.0 parts of 325-mesh glass flakes, and floating aluminum powder: 3.0 parts of hollow glass beads with 200 meshes, 10.0 parts of hollow glass beads with 100 meshes, 6.0 parts of hollow glass beads with 60 meshes, 3.0 parts of asbestos fiber powder and 5.0 parts of low-melting-point glass powder. The 200 mesh hollow glass beads are from American 3M company, and the 325 mesh glass flakes are from Japanese Asahi glass company
The preparation method of the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating comprises the following specific steps:
(1) stirring absolute ethyl alcohol, isopropanol and ethyl silicate-40 at a ratio of 300 revolutions per minute for 12 minutes in the mixing process to obtain a mixture A;
(2): mixing deionized water, hydrochloric acid, zinc oxide, etc. in proportion and stirring uniformly to obtain a mixture B; adding the mixture B into the mixture A under the stirring of 300 revolutions per minute, and standing for 35 minutes to obtain a mixture C, namely a silicate prepolymer;
(3) keeping the temperature of the silicate prepolymer at 55 ℃ for 40 minutes, adding 2.5 parts of phenyl trimethoxy silane coupling agent, reacting at 70 ℃ for 50 minutes to prepare silane modified silicate prepolymer, continuously adding W991-6 organic silicon resin, and reacting at 70 ℃ for 60 minutes to obtain inorganic silicon-organic silicon copolymer;
(4) 1.5 parts of gamma-glycidyl ether oxypropyl trimethoxy silane is added into an inorganic silicon-organic silicon copolymer, carbon fiber, glass flake, floating aluminum powder, 200-mesh hollow glass micro-beads, 100-mesh hollow glass micro-beads, 60-mesh hollow glass micro-beads, asbestos fiber powder and low-melting-point glass powder are added according to a proportion, the mixture is stirred and dispersed for 25 minutes at 300rpm by using a stirrer to prepare the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating energy-saving coating, the inorganic silicon-organic silicon copolymerized heat-insulating energy-saving coating is coated at the bottom of a metal matrix to be used as a heat-insulating base coat of the metal matrix, the thickness of the heat-insulating base coat is 0.2mm, the material of the metal matrix is Q carbon steel 235, the thickness of the metal matrix is 3mm, and the coating is completely cured after being maintained for 120 hours at 25 ℃.
And (3) measuring: the adhesive force between the heat-insulating base coat and the metal matrix is 4 MPa; the heat-insulating base coat has no damage after being subjected to cold-heat exchange change impact test for 60 times from 400 ℃ to 25 ℃; the neutral salt spray is carried out for 1000 hours, and the metal matrix is not corroded and damaged; the metal matrix is not corroded after being soaked in 3 percent sodium chloride salt water for 720 hours at the temperature of 25 ℃.
In addition, the heat insulation coating with the thickness of 3mm can cool the back of a steel plate with the temperature of 400 ℃ to 240 ℃, the thickness of the steel plate is 3mm, and the steel plate is made of Q235 carbon steel; 400 ℃ means the temperature of the heat source, i.e. the surface temperature of the steel sheet without coating in contact with the heat source; the back of the steel plate is coated with heat-insulating coating to play a role in cooling, so that the temperature of the back of the steel plate reaches 240 ℃.
Example 2
In the embodiment, the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating for energy conservation of the heat supply pipeline comprises the following specific formula in parts by weight:
6.5 parts of absolute ethyl alcohol, 2.5 parts of isopropanol, 4020.0 parts of ethyl silicate, 1.5 parts of deionized water, 0.2 part of 35% hydrochloric acid by mass fraction, 0.3 part of zinc oxide and 3.0 parts of gamma-glycidyl ether oxypropyltrimethoxysilane, wherein the above are silane modified silicate prepolymer;
19.0 parts of W991-6 organic silicon resin, 1.6 parts of gamma-glycidyl ether oxypropyl trimethoxy silane and carbon fiber: 0.4 part, 5.0 parts of 325-mesh glass flakes, 2.0 parts of floating aluminum powder, 15.0 parts of 200-mesh hollow glass beads, 13.0 parts of 100-mesh hollow glass beads, 3.0 parts of 60-mesh hollow glass beads, 3.0 parts of asbestos fiber powder and low-melting-point glass powder: 4.0 parts. The 200 mesh hollow glass beads are from 3M company in America, and the 325 mesh glass flakes are from Asahi glass company in Japan.
The preparation method of the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating comprises the following specific steps:
(1) stirring absolute ethyl alcohol, isopropanol and ethyl silicate-40 at a speed of 300 revolutions per minute for 18 minutes in the mixing process according to the proportion to obtain a mixture A;
(2): mixing deionized water, hydrochloric acid, zinc oxide, etc. in proportion and stirring uniformly to obtain a mixture B; adding the mixture B into the mixture A under the stirring of 300 revolutions per minute, and standing for 40 minutes to obtain a mixture C, namely a silicate prepolymer;
(3) adding 3.0 parts of gamma-glycidyl ether oxypropyl trimethoxy silane coupling agent into the silicate prepolymer after the silicate prepolymer is subjected to heat preservation reaction at 60 ℃ for 40 minutes, reacting at 80 ℃ for 40 minutes to prepare silane modified silicate prepolymer, continuously adding W991-6 organic silicon resin into the silane modified silicate prepolymer, and reacting at 80 ℃ for 50 minutes to obtain SiO2-a silicone copolymer.
(4) 1.6 parts of gamma-glycidyl ether oxypropyltrimethoxysilane is added into an inorganic silicon-organic silicon copolymer, carbon fiber, glass flakes, floating aluminum powder, 200-mesh hollow glass microspheres, 100-mesh hollow glass microspheres, 60-mesh hollow glass microspheres, asbestos fiber powder, low-melting-point glass powder and the like are added according to a proportion, the mixture is stirred and dispersed for 40 minutes at 250rpm by using a stirrer to prepare the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating energy-saving coating, the inorganic silicon-organic silicon copolymerized heat-insulating energy-saving coating is coated at the bottom of a metal matrix and used as a heat-insulating base coat of the metal matrix, the thickness of the heat-insulating base coat is 0.2mm, the material of the metal matrix is Q carbon steel 235, the thickness of the metal matrix is 3mm, and the coating is completely cured after being maintained for 144 hours at 50 ℃.
And (3) measuring: the adhesive force between the heat-insulating base coat and the metal matrix is 4.6 MPa; the heat-insulating base coat is subjected to a cold-heat exchange change impact resistance test for 80 times from 400 ℃ to 25 ℃, and is free from damage; the neutral salt spray is carried out for 1000 hours, and the metal matrix is not corroded and damaged; the metal matrix is not corroded after being soaked in 3 percent sodium chloride salt water for 720 hours at the temperature of 25 ℃.
The 6mm heat insulation coating can cool the back of a steel plate at 400 ℃ to 176 ℃, and the thickness of the steel plate is 3 mm; the steel plate is made of Q235 carbon steel; 400 ℃ means the temperature of the heat source, i.e. the surface temperature of the steel sheet without coating in contact with the heat source; the back of the steel plate is coated with heat insulation paint to play a role in cooling, so that the temperature of the back of the steel plate reaches 176 ℃.
Example 3
The inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating for energy conservation of the heat supply pipeline comprises the following specific formula in parts by weight:
6.0 parts of absolute ethyl alcohol, 2.0 parts of isopropanol, 4020.0 parts of ethyl silicate, 1.0 part of deionized water, 0.1 part of hydrochloric acid with the mass fraction of 35%, 0.3 part of zinc oxide and 2.5 parts of vinyl triethoxysilane, wherein the above are silane modified silicate prepolymer;
12.0 parts of W991-6 organic silicon resin, 1.5 parts of vinyl triethoxysilane, and carbon fiber: 0.3 part, 5.0 parts of glass flakes, 2.0 parts of floating aluminum powder, 14.0 parts of 200-mesh hollow glass beads, 13.0 parts of 100-mesh hollow glass beads, 3.0 parts of 60-mesh hollow glass beads, 3.0 parts of asbestos fiber powder and low-melting-point glass powder: 4.0 parts.
The preparation method of the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating comprises the following specific steps:
(1) stirring absolute ethyl alcohol, isopropanol and ethyl silicate-40 for 10 minutes at 300 revolutions per minute in the mixing process according to the proportion to obtain a mixture A;
(2): mixing deionized water, hydrochloric acid, zinc oxide, etc. in proportion and stirring uniformly to obtain a mixture B; adding the mixture B into the mixture A under the stirring of 300 revolutions per minute, and standing for 30 minutes to obtain a mixture C, namely a silicate prepolymer;
(3) keeping the silicate prepolymer at 50 ℃ for reaction for 30 minutes, adding 2.5 parts of vinyltriethoxysilane, reacting at 70 ℃ for 30 minutes to prepare silane modified silicate prepolymer, adding W991-6 organic silicon resin, and reacting at 70 ℃ for 30 minutes to obtain the SiO 2-organic silicon copolymer.
(4) Adding 1.5 parts of vinyltriethoxysilane into an inorganic silicon-organic silicon copolymer, adding carbon fiber, glass flakes, aluminum flakes, 200-mesh hollow glass beads, 100-mesh hollow glass beads, 60-mesh hollow glass beads, asbestos fiber powder, low-melting-point glass powder and the like according to a proportion, stirring and dispersing for 20 minutes at 200rpm by using a stirrer to prepare the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating energy-saving coating, coating the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating energy-saving coating on the bottom of a metal matrix to serve as a heat-insulating base coat of the metal matrix, wherein the thickness of the heat-insulating base coat is 0.3mm, the material of the metal matrix is Q235 carbon steel, the thickness of the metal matrix is 3mm, and the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating energy-saving coating is completely cured after being maintained at 15 ℃ for 120 hours.
And (3) measuring: the adhesive force between the heat insulation base coat and the steel plate is 3.9 MPa; the heat-insulating base coat has no damage after being subjected to a cold-heat exchange change impact resistance test for 62 times from 400 ℃ to 25 ℃; the neutral salt spray is carried out for 1000 hours, and the metal matrix is not corroded and damaged; the metal matrix is not corroded after being soaked in 3 percent sodium chloride salt water for 720 hours at the temperature of 25 ℃.
In addition, the heat insulation coating with the thickness of 3mm can cool the back of a steel plate with the temperature of 400 ℃ to 251 ℃, the thickness of the steel plate is 3mm, and the steel plate is made of Q235 carbon steel; 400 ℃ means the temperature of the heat source, i.e. the surface temperature of the steel sheet without coating in contact with the heat source; the back of the steel plate is coated with heat insulation paint to play a role in cooling, so that the temperature of the back of the steel plate reaches 251 ℃.
Example 4
The inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating for energy conservation of the heat supply pipeline comprises the following specific formula in parts by weight:
7.0 parts of absolute ethyl alcohol, 3.0 parts of isopropanol, 4025.0 parts of ethyl silicate, 1.5 parts of deionized water, 0.3 part of 35% hydrochloric acid by mass fraction, 0.5 part of zinc oxide and 4.0 parts of gamma-glycidyl ether oxypropyltrimethoxysilane, wherein the above are silane modified silicate prepolymer;
20.0 parts of W991-6 organic silicon resin, 3.0 parts of phenyl trimethoxy silane and carbon fiber: 0.6 part, 6.0 parts of glass flakes, 4.0 parts of floating aluminum powder, 20.0 parts of 200-mesh hollow glass beads, 17.0 parts of 100-mesh hollow glass beads, 4.0 parts of 60-mesh hollow glass beads, 4.0 parts of asbestos fiber powder and low-melting-point glass powder: 5.0 parts.
The preparation method of the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating comprises the following specific steps:
(1) stirring absolute ethyl alcohol, isopropanol and ethyl silicate-40 for 20 minutes at 300 revolutions per minute in the mixing process according to the proportion to obtain a mixture A;
(2): mixing deionized water, hydrochloric acid, zinc oxide, etc. in proportion and stirring uniformly to obtain a mixture B; adding the mixture B into the mixture A under the stirring of 300 revolutions per minute, and standing for 50 minutes to obtain a mixture C, namely a silicate prepolymer;
(3) keeping the temperature of the silicate prepolymer at 70 ℃ for reacting for 60 minutes, adding 4.0 parts of gamma-glycidoxypropyltrimethoxysilane, reacting for 50 minutes at 80 ℃ to prepare a silane modified silicate prepolymer, continuously adding W991-6 organic silicon resin, and reacting for 60 minutes at 80 ℃ to obtain the SiO 2-organic silicon copolymer.
(4) Adding 3.0 parts of phenyltrimethoxysilane into the inorganic silicon-organic silicon copolymer, adding carbon fiber, glass flakes, aluminum float powder, 200-mesh hollow glass beads, 100-mesh hollow glass beads, 60-mesh hollow glass beads, asbestos fiber powder, low-melting-point glass powder and the like according to the proportion, stirring and dispersing for 40 minutes at 300rpm by using a stirrer to prepare the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating energy-saving coating, coating the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating energy-saving coating on the bottom of a metal matrix to serve as a heat-insulating base coat of the metal matrix, wherein the thickness of the heat-insulating base coat is 0.3mm, the material of the metal matrix is Q235 carbon steel, the thickness of the metal matrix is 3mm, and the coating is completely cured after being maintained for 240 hours at 100 ℃.
And (3) measuring: the adhesive force between the heat insulation base coat and the steel plate is 4.0 MPa; the heat-insulating base coat has no damage after being subjected to cold-heat exchange change impact test for 64 times at the temperature of 400-25 ℃; the neutral salt spray is carried out for 1000 hours, and the metal matrix is not corroded and damaged; the metal matrix is not corroded after being soaked in 3 percent sodium chloride salt water for 720 hours at the temperature of 25 ℃.
In addition, the heat insulation coating with the thickness of 3mm can cool the back of a steel plate with the temperature of 400 ℃ to 246 ℃, and the steel plate is made of Q235 carbon steel; 400 ℃ means the temperature of the heat source, i.e. the surface temperature of the steel sheet without coating in contact with the heat source; the back of the steel plate is coated with heat insulation paint to play a role in cooling, so that the temperature of the back of the steel plate reaches 246 ℃.
Example 5
The inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating for energy conservation of the heat supply pipeline comprises the following specific formula in parts by weight:
6.6 parts of absolute ethyl alcohol, 2.3 parts of isopropanol, 4022.0 parts of ethyl silicate, 1.2 parts of deionized water, 0.2 part of hydrochloric acid with the mass fraction of 35%, 0.4 part of zinc oxide and 3.2 parts of phenyl trimethoxy silane, wherein the silane modified silicate prepolymer is prepared by mixing the raw materials;
16.0 parts of W991-6 organic silicon resin, 2.2 parts of vinyl triethoxysilane, and carbon fiber: 0.5 part, 5.6 parts of glass flakes, 3.0 parts of floating aluminum powder, 17.0 parts of 200-mesh hollow glass beads, 14.0 parts of 100-mesh hollow glass beads, 4.0 parts of 60-mesh hollow glass beads, 3.3 parts of asbestos fiber powder and low-melting-point glass powder: 3.2 parts.
The preparation method of the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating comprises the following specific steps:
(1) stirring absolute ethyl alcohol, isopropanol and ethyl silicate-40 for 16 minutes at 300 revolutions per minute in the mixing process according to the proportion to obtain a mixture A;
(2): mixing deionized water, hydrochloric acid, zinc oxide, etc. in proportion and stirring uniformly to obtain a mixture B; adding the mixture B into the mixture A under the stirring of 300 revolutions per minute, and standing for 45 minutes to obtain a mixture C, namely a silicate prepolymer;
(3) keeping the silicate prepolymer at 60 ℃ for reacting for 45 minutes, adding 3.2 parts of phenyl trimethoxy silane, reacting at 75 ℃ for 38 minutes to prepare a silane modified silicate prepolymer, adding W991-6 organic silicon resin, and reacting at 76 ℃ for 50 minutes to obtain the SiO 2-organic silicon copolymer.
(4) Adding 2.2 parts of vinyltriethoxysilane into an inorganic silicon-organic silicon copolymer, adding carbon fiber, glass flakes, aluminum float powder, 200-mesh hollow glass beads, 100-mesh hollow glass beads, 60-mesh hollow glass beads, asbestos fiber powder, low-melting-point glass powder and the like according to a proportion, stirring and dispersing for 36 minutes at 250rpm by using a stirrer to prepare the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating energy-saving coating, coating the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating energy-saving coating on the bottom of a metal matrix to serve as a heat-insulating base coat of the metal matrix, wherein the thickness of the heat-insulating base coat is 0.3mm, the material of the metal matrix is Q235 carbon steel, the thickness of the metal matrix is 3mm, and the coating is completely cured after being maintained for 150 hours at 45 ℃.
And (3) measuring: the adhesive force between the heat insulation base coat and the steel plate is 4.3 MPa; the heat-insulating base coat has 70 times of cold-heat exchange change impact resistance tests from 400 ℃ to 25 ℃, and has no damage; the neutral salt spray is carried out for 1000 hours, and the metal matrix is not corroded and damaged; the metal matrix is not corroded after being soaked in 3 percent sodium chloride salt water for 720 hours at the temperature of 25 ℃.
In addition, the heat insulation coating with the thickness of 3mm can cool the back of a steel plate with the temperature of 400 ℃ to 230 ℃, the thickness of the steel plate is 3mm, and the steel plate is made of Q235 carbon steel; 400 ℃ means the temperature of the heat source, i.e. the surface temperature of the steel sheet without coating in contact with the heat source; the back of the steel plate is coated with heat insulation paint to play a role in cooling, so that the temperature of the back of the steel plate reaches 230 ℃.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the overall concept of the present invention, and these should also be considered as the protection scope of the present invention.

Claims (5)

1. The inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating is characterized by comprising the following raw materials in parts by weight: 6.0-7.0 parts of absolute ethyl alcohol, 2.0-3.0 parts of isopropanol, 4020.0-25.0 parts of ethyl silicate, 1.0-1.5 parts of deionized water, 0.1-0.3 part of 35% hydrochloric acid and 0.3-0.5 part of zinc oxide; adding 2.5-4.0 parts of silane coupling agent into the silicate prepolymer, heating for reaction to prepare silane modified silicate prepolymer, and adding 12.0-20.0 parts of organic silicon polymer to prepare inorganic silicon-organic silicon copolymer; continuously adding 1.5-3.0 parts of silane coupling agent, 0.3-0.6 part of carbon fiber, 2.0-4.0 parts of floating aluminum powder and hollow glass beads: 30.0-40.0 parts of glass flakes, 5.0-6.0 parts of asbestos fiber powder: 3.0-4.0 parts of low-melting-point glass powder: 4.0-5.0 parts of a temperature-resistant heat-insulating coating; the hollow glass beads and the glass flakes are composite heat-insulating filler.
2. The inorganic silicon-organic silicon copolymerization temperature-resistant heat-insulating coating as claimed in claim 1, wherein the silane coupling agent is phenyl trimethoxy silane, vinyl triethoxy silane, gamma-glycidyl ether oxypropyl trimethoxy silane.
3. The inorganic silicon-organic silicon copolymerization temperature-resistant heat-insulating coating as claimed in claim 1, wherein the hollow glass beads are 200 mesh hollow glass beads, 100 mesh hollow glass beads and 60 mesh hollow glass beads, and the glass flakes are 325 mesh glass flakes.
4. A preparation method of inorganic silicon-organic silicon copolymer temperature-resistant heat-insulating coating is characterized by comprising the following steps:
(1): anhydrous ethanol: 6.0-7.0 parts; isopropyl alcohol: 2.0-3.0 parts; ethyl silicate-40: 20.0-25.0 parts; stirring the components at a medium speed for 10-20 minutes to obtain a mixture A;
(2): deionized water: 1.0-1.5 parts; 35% by mass of hydrochloric acid: 0.1-0.3 part; zinc oxide: 0.3-0.5 part; the three components are mixed and stirred evenly to obtain a mixture B; adding the mixture B into the mixture A under the condition of stirring at medium speed, and standing for 30-50 minutes to obtain a mixture C;
(3) firstly, the mixture C is subjected to heat preservation reaction at 50-70 ℃ for 30-60 minutes, then 2.5-4.0 parts of silane coupling agent is added, and the reaction is carried out at 70-80 ℃ for 30-50 minutes to prepare silane modified silicate prepolymer; adding 12.0-20.0 parts of organic silicon polymer into the prepolymer for reaction to prepare inorganic silicon-organic silicon copolymer, wherein the reaction temperature is as follows: and (3) at 70-80 ℃, reaction time: 30-60 minutes;
(3): then adding a silane coupling agent: 1.5-3.0 parts of carbon fiber: 0.3-0.6 part, 5.0-6.0 parts of glass flakes, and floating aluminum powder: 2.0-4.0 parts of hollow glass beads: 30.0-40.0 parts of asbestos fiber powder: 3.0-4.0 parts of low-melting-point glass powder: 4.0-5.0 parts; stirring and dispersing for 20-40 minutes at 200-300 rpm by using a stirrer to prepare the inorganic silicon-organic silicon copolymerized temperature-resistant heat-insulating coating.
5. The use method of the inorganic silicon-organic silicon copolymer temperature-resistant heat-insulating coating according to any one of claims 1 to 4, wherein the temperature-resistant heat-insulating coating is brushed, blade-coated or poured on a heat supply pipeline, and cured at 15-100 ℃ for 120-240 hours to be used as the temperature-resistant heat-insulating coating.
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