Silica Aerogel Coating

 

Key Properties 

1. Stable chemical properties: It has good chemical stability, is not easy to react with other substances, can maintain stable performance in different chemical environments, and can resist the erosion of chemical substances such as acid and alkali.

 

2. Excellent fire performance: It is a non-combustible material with flame retardant effect, can effectively prevent the spread of flame, can significantly improve the fire safety of coated objects, and is widely used in construction, industry and other fields with high fire protection requirements.

 

3. Sprayability: The coating can be constructed by spraying, can uniformly cover the surface of complex shapes and various materials, adapt to different application scenarios, such as pipelines, special-shaped equipment, etc., greatly improve construction efficiency, reduce construction difficulty and time cost.

 

4. Good compatibility: It can be well combined with a variety of substrates, including metals, ceramics, plastics, glass and various building materials, etc., without complex pretreatment process, it can ensure that there is a strong adhesion between the coating and the substrate, and ensure that the coating is not easy to fall off during long-term use.

1. High-temperature pipeline and equipment insulation: In petrochemical, electric power and other industries, a large number of high-temperature steam pipelines, hot oil pipelines and various reactors, cracking furnaces and other equipment need good insulation measures. Silica Aerogel Coating has very low thermal conductivity, which can effectively reduce heat loss, reduce energy loss, and improve energy efficiency. Meanwhile, its high temperature resistance ensures stable operation in long-term high temperature environment, reducing thermal stress and corrosion risk of equipment.

2.LNG tank insulation: The storage of liquefied natural gas (LNG) requires a very low temperature, Silica Aerogel Coating can be used for the insulation of LNG storage tanks, prevent the outside heat into the tank resulting in LNG vaporization, reduce the generation of BOG (evaporated gas), reduce safety risks and operating costs. At the same time, its good low temperature resistance and chemical stability can ensure long-term use in low temperature environment.

3. Metal high-temperature protection and fire prevention: In the metallurgical industry, such as iron and steel smelting, non-ferrous metal processing, etc., the surface of high-temperature furnaces, furnaces, heating furnaces and other equipment needs to be protected. Silica Aerogel Coating can not only play a role in heat insulation, reduce heat dissipation, improve thermal efficiency, but also effectively prevent flame and heat erosion of metal structure, prevent metal material deformation, oxidation and corrosion at high temperature, extend the service life of equipment, improve production safety.

4. Casting mold insulation: In the casting process, the temperature control of the mold is crucial to the quality of the casting. Silica Aerogel Coating can be applied to the surface of the casting mold, playing the role of heat preservation and heat insulation, so that the mold can maintain a stable temperature during the casting process, which is conducive to the filling and solidification of the metal liquid, and improve the quality and yield of the casting.

1. What is the principle of insulation?
On the one hand, the average aperture inside the aerogel is smaller than the air free path, which can greatly reduce the heat conduction of the gas and produce "zero convection" effect. On the other hand, the scattered pores minimize the heat transmitted by thermal radiation, which is equivalent to the "infinite thermal partition" effect, and then combined with special anti-radiation substances, can more effectively block radiation heat transfer. In addition, heat can only be transferred through holes in the aerogel, and the infinite number of holes makes the heat transfer path infinitely long, so that the heat transfer tends to be minimal.

2. How does the thickness of the coating affect the performance?
Under normal circumstances, the increase of coating thickness, thermal insulation, thermal insulation, sound insulation and other properties will be correspondingly enhanced, but at the same time, it may also increase the cost, weight and construction difficulty. Therefore, it is necessary to choose the appropriate coating thickness according to the specific application scenarios and needs.

3. What is the effect on industrial pipeline insulation?
It can effectively reduce heat loss, reduce energy loss, and improve energy efficiency. At the same time, its high temperature resistance can ensure stable work in a long-term high temperature environment, reduce the thermal stress and corrosion risk of the pipeline, which can greatly reduce the surface temperature of the pipeline and reduce the heat emission to the surrounding environment.

4. What are the application advantages in building energy efficiency?
It can be used for external wall insulation, roof insulation and energy-saving doors and Windows, which can effectively reduce the heat transfer inside and outside the building, reduce the heat loss in winter and the heat transfer in summer, reduce building energy consumption, improve energy utilization efficiency, and keep the indoor temperature environment comfortable, while also having certain waterproof, moisture-proof and sound insulation performance.

5. How to repair coating damage?
If the coating is damaged in a small area, it can be repaired by using the same paint. If the area of damage is large, it may be necessary to re-coat. Before repair, it is necessary to clean the damaged part and ensure that the surface is dry and smooth.

6. What are the main factors affecting the cost?
The cost is mainly affected by raw material price, production process complexity, coating thickness, application scale and other factors. With the continuous progress of technology and the expansion of production scale, its cost is expected to gradually reduce.

7. Is it harmful to human body and the environment?
Silica aerogel itself is a non-toxic, tasteless, pollution-free material, in the process of use will not cause harm to the human body and the environment. However, during the construction process, care should be taken to avoid inhaling volatiles and dust in the paint, and the construction personnel should wear appropriate protective equipment.

8. What are the main production processes?
The common production process is sol-gel method. Firstly, silica source such as ethyl orthosilicate is mixed with solvent and catalyst to form sol, and then hydrolyzed and polycondensation reaction to form wet gel. Finally, the solvent is removed by supercritical drying or atmospheric drying to obtain aerogel, and then the coating is prepared. There are also precipitation methods, microemulsion methods, etc. Different processes will affect the performance and cost of aerogel.

9. What are the quality control points in the production process?
In the production process, the key is to control the purity and proportion of raw materials, to ensure the stability of reaction conditions such as temperature, pH value, reaction time, etc., to ensure the consistency of the structure and performance of the aerogel. At the same time, the control of parameters in the drying process is also crucial, such as pressure and temperature in supercritical drying, otherwise it may lead to the destruction of aerogel structure or the degradation of performance.

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